THE DAWNING OF THE STREAM OF AQUARIUS IN RAVE
Identifieur interne : 006679 ( Main/Exploration ); précédent : 006678; suivant : 006680THE DAWNING OF THE STREAM OF AQUARIUS IN RAVE
Auteurs : M. E. K. Williams [Allemagne] ; M. Steinmetz [Allemagne] ; S. Sharma [Australie] ; J. Bland-Hawthorn [Australie] ; R. S. De Jong [Allemagne] ; G. M. Seabroke [Royaume-Uni] ; A. Helmi [Pays-Bas] ; K. C. Freeman [Australie] ; J. Binney [Royaume-Uni] ; I. Minchev [Allemagne] ; O. Bienayme [France] ; R. Campbell [États-Unis] ; J. P. Fulbright [États-Unis] ; B. K. Gibson [Royaume-Uni] ; G. F. Gilmore [Royaume-Uni] ; E. K. Grebel [Allemagne] ; U. Munari [Italie] ; J. F. Navarro [Canada] ; Q. A. Parker [Australie] ; W. Reid [Australie] ; A. Siebert [France] ; A. Siviero [Allemagne, Italie] ; F. G. Watson [Australie] ; R. F. G. Wyse [États-Unis] ; T. Zwitter [Slovénie]Source :
- The Astrophysical journal [ 0004-637X ] ; 2011.
Descripteurs français
- Pascal (Inist)
English descriptors
- KwdEn :
Abstract
We identify a new, nearby (0.5 kpc ? d ? 10 kpc) stream in data from the RAdial Velocity Experiment (RAVE). As the majority of stars in the stream lie in the constellation of Aquarius, we name it the Aquarius Stream. We identify 15 members of the stream lying between 30° < l < 75° and -70° < b < -50°, with heliocentric line-of-sight velocities Vlos ∼ -200 km s-1. The members are outliers in the radial velocity distribution, and the overdensity is statistically significant when compared to mock samples created with both the Besançon Galaxy model and newly developed code Galaxia. The metallicity distribution function and isochrone fit in the log g-Teff plane suggest that the stream consists of a 10 Gyr old population with [M/H] ∼ -1.0. We explore relations to other streams and substructures, finding that the stream cannot be identified with known structures: it is a new, nearby substructure in the Galaxy's halo. Using a simple dynamical model of a dissolving satellite galaxy, we account for the localization of the stream. We find that the stream is dynamically young and therefore likely the debris of a recently disrupted dwarf galaxy or globular cluster. The Aquarius stream is thus a specimen of ongoing hierarchical Galaxy formation, rare for being right in the solar suburb.
Affiliations:
- Allemagne, Australie, Canada, France, Italie, Pays-Bas, Royaume-Uni, Slovénie, États-Unis
- Alsace (région administrative), Angleterre, Angleterre de l'Est, Bade-Wurtemberg, District de Karlsruhe, Grand Est, Grand Londres, Groningue (province), Kentucky, Nouvelle-Galles du Sud, Oxfordshire
- Cambridge, Groningue (ville), Heidelberg, Londres, Oxford, Strasbourg, Sydney
- University College de Londres, Université d'Oxford, Université de Cambridge, Université de Groningue, Université de Strasbourg, Université de Sydney
Links toward previous steps (curation, corpus...)
- to stream PascalFrancis, to step Corpus: 001E65
- to stream PascalFrancis, to step Curation: 004072
- to stream PascalFrancis, to step Checkpoint: 001629
- to stream Main, to step Merge: 006A80
- to stream Main, to step Curation: 006679
Le document en format XML
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Helmi</name><affiliation wicri:level="4"><inist:fA14 i1="05"><s1>Kapteyn Astronomical Institute, University of Groningen, Postbus 800</s1><s2>9700 AV Groningen</s2><s3>NLD</s3><sZ>7 aut.</sZ></inist:fA14><country>Pays-Bas</country><wicri:noRegion>9700 AV Groningen</wicri:noRegion><orgName type="university">Université de Groningue</orgName><placeName><settlement type="city">Groningue (ville)</settlement><region>Groningue (province)</region></placeName></affiliation></author><author><name sortKey="Freeman, K C" sort="Freeman, K C" uniqKey="Freeman K" first="K. C." last="Freeman">K. C. Freeman</name><affiliation wicri:level="1"><inist:fA14 i1="06"><s1>RSAA Australian National University, Mount Stromlo Observatory, Cotter Road, Weston Creek</s1><s2>Canberra, ACT 72611</s2><s3>AUS</s3><sZ>8 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>Canberra, ACT 72611</wicri:noRegion></affiliation></author><author><name sortKey="Binney, J" sort="Binney, J" uniqKey="Binney J" first="J." last="Binney">J. Binney</name><affiliation wicri:level="4"><inist:fA14 i1="07"><s1>Rudolf Pierls Center for Theoretical Physics, University of Oxford, 1 Keble Road</s1><s2>Oxford OX1 3NP</s2><s3>GBR</s3><sZ>9 aut.</sZ></inist:fA14><country>Royaume-Uni</country><wicri:noRegion>Oxford OX1 3NP</wicri:noRegion><orgName type="university">Université d'Oxford</orgName><placeName><settlement type="city">Oxford</settlement><region type="nation">Angleterre</region><region type="région" nuts="1">Oxfordshire</region></placeName></affiliation></author><author><name sortKey="Minchev, I" sort="Minchev, I" uniqKey="Minchev I" first="I." last="Minchev">I. Minchev</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Astrophysikalisches Institut Potsdam, An der Sterwarte 16</s1><s2>14482 Potsdam</s2><s3>DEU</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>5 aut.</sZ><sZ>10 aut.</sZ><sZ>22 aut.</sZ></inist:fA14><country>Allemagne</country><wicri:noRegion>14482 Potsdam</wicri:noRegion><wicri:noRegion>An der Sterwarte 16</wicri:noRegion><wicri:noRegion>14482 Potsdam</wicri:noRegion></affiliation></author><author><name sortKey="Bienayme, O" sort="Bienayme, O" uniqKey="Bienayme O" first="O." last="Bienayme">O. Bienayme</name><affiliation wicri:level="4"><inist:fA14 i1="08"><s1>Observatoire astronomique de Strasbourg, Université de Strasbourg, CNRS, UMR 7550</s1><s2>Strasbourg</s2><s3>FRA</s3><sZ>11 aut.</sZ><sZ>21 aut.</sZ></inist:fA14><country>France</country><placeName><region type="region">Grand Est</region><region type="old region">Alsace (région administrative)</region><settlement type="city">Strasbourg</settlement><settlement type="city">Strasbourg</settlement></placeName><orgName type="university">Université de Strasbourg</orgName></affiliation></author><author><name sortKey="Campbell, R" sort="Campbell, R" uniqKey="Campbell R" first="R." last="Campbell">R. Campbell</name><affiliation wicri:level="2"><inist:fA14 i1="09"><s1>Department of Physics and Astronomy, Western Kentucky University</s1><s2>Bowling Green, Kentucky</s2><s3>USA</s3><sZ>12 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">Kentucky</region></placeName></affiliation></author><author><name sortKey="Fulbright, J P" sort="Fulbright, J P" uniqKey="Fulbright J" first="J. P." last="Fulbright">J. P. Fulbright</name><affiliation wicri:level="1"><inist:fA14 i1="10"><s1>Department of Physics and Astronomy, Johns Hopkins University, 3400 N Charles Street</s1><s2>Baltimore, MD 21218</s2><s3>USA</s3><sZ>13 aut.</sZ><sZ>24 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Baltimore, MD 21218</wicri:noRegion></affiliation></author><author><name sortKey="Gibson, B K" sort="Gibson, B K" uniqKey="Gibson B" first="B. K." last="Gibson">B. K. Gibson</name><affiliation wicri:level="1"><inist:fA14 i1="11"><s1>Jeremiah Horrocks Institute for Astrophysics & Super-computing, University of Central Lancashire</s1><s2>Preston</s2><s3>GBR</s3><sZ>14 aut.</sZ></inist:fA14><country>Royaume-Uni</country><wicri:noRegion>Preston</wicri:noRegion></affiliation></author><author><name sortKey="Gilmore, G F" sort="Gilmore, G F" uniqKey="Gilmore G" first="G. F." last="Gilmore">G. F. Gilmore</name><affiliation wicri:level="4"><inist:fA14 i1="12"><s1>Institute of Astronomy, University of Cambridge, Madingley Road</s1><s2>Cambridge CB3 0HA</s2><s3>GBR</s3><sZ>15 aut.</sZ></inist:fA14><country>Royaume-Uni</country><wicri:noRegion>Cambridge CB3 0HA</wicri:noRegion><orgName type="university">Université de Cambridge</orgName><placeName><settlement type="city">Cambridge</settlement><region type="country">Angleterre</region><region type="région" nuts="1">Angleterre de l'Est</region></placeName></affiliation></author><author><name sortKey="Grebel, E K" sort="Grebel, E K" uniqKey="Grebel E" first="E. K." last="Grebel">E. K. Grebel</name><affiliation wicri:level="3"><inist:fA14 i1="13"><s1>Astronomisches Rechen-Institut, Zentrum für Astronomie der Universität Heidelberg</s1><s2>69120 Heidelberg</s2><s3>DEU</s3><sZ>16 aut.</sZ></inist:fA14><country>Allemagne</country><placeName><region type="land" nuts="1">Bade-Wurtemberg</region><region type="district" nuts="2">District de Karlsruhe</region><settlement type="city">Heidelberg</settlement></placeName></affiliation></author><author><name sortKey="Munari, U" sort="Munari, U" uniqKey="Munari U" first="U." last="Munari">U. Munari</name><affiliation wicri:level="1"><inist:fA14 i1="14"><s1>INAF Osservatorio Astronomico di Padova, Via dell'Osservatorio 8</s1><s2>Asiago 36012</s2><s3>ITA</s3><sZ>17 aut.</sZ><sZ>22 aut.</sZ></inist:fA14><country>Italie</country><wicri:noRegion>Asiago 36012</wicri:noRegion></affiliation></author><author><name sortKey="Navarro, J F" sort="Navarro, J F" uniqKey="Navarro J" first="J. F." last="Navarro">J. F. Navarro</name><affiliation wicri:level="1"><inist:fA14 i1="15"><s1>Department of Physics and Astronomy, University of Victoria, P.O. Box 3055, Station CSC</s1><s2>Victoria, BC V8W 3P6</s2><s3>CAN</s3><sZ>18 aut.</sZ></inist:fA14><country>Canada</country><wicri:noRegion>Victoria, BC V8W 3P6</wicri:noRegion></affiliation></author><author><name sortKey="Parker, Q A" sort="Parker, Q A" uniqKey="Parker Q" first="Q. A." last="Parker">Q. A. Parker</name><affiliation wicri:level="1"><inist:fA14 i1="03"><s1>Australian Astronomical Observatory, P.O. Box 296</s1><s2>Epping, NSW 1710</s2><s3>AUS</s3><sZ>4 aut.</sZ><sZ>19 aut.</sZ><sZ>23 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>Epping, NSW 1710</wicri:noRegion></affiliation><affiliation wicri:level="1"><inist:fA14 i1="16"><s1>Department of Physics and Astronomy, Macquarie University</s1><s2>Sydney, NSW 2109</s2><s3>AUS</s3><sZ>19 aut.</sZ><sZ>20 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>Sydney, NSW 2109</wicri:noRegion></affiliation></author><author><name sortKey="Reid, W" sort="Reid, W" uniqKey="Reid W" first="W." last="Reid">W. Reid</name><affiliation wicri:level="1"><inist:fA14 i1="16"><s1>Department of Physics and Astronomy, Macquarie University</s1><s2>Sydney, NSW 2109</s2><s3>AUS</s3><sZ>19 aut.</sZ><sZ>20 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>Sydney, NSW 2109</wicri:noRegion></affiliation></author><author><name sortKey="Siebert, A" sort="Siebert, A" uniqKey="Siebert A" first="A." last="Siebert">A. Siebert</name><affiliation wicri:level="4"><inist:fA14 i1="08"><s1>Observatoire astronomique de Strasbourg, Université de Strasbourg, CNRS, UMR 7550</s1><s2>Strasbourg</s2><s3>FRA</s3><sZ>11 aut.</sZ><sZ>21 aut.</sZ></inist:fA14><country>France</country><placeName><region type="region">Grand Est</region><region type="old region">Alsace (région administrative)</region><settlement type="city">Strasbourg</settlement><settlement type="city">Strasbourg</settlement></placeName><orgName type="university">Université de Strasbourg</orgName></affiliation></author><author><name sortKey="Siviero, A" sort="Siviero, A" uniqKey="Siviero A" first="A." last="Siviero">A. Siviero</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Astrophysikalisches Institut Potsdam, An der Sterwarte 16</s1><s2>14482 Potsdam</s2><s3>DEU</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>5 aut.</sZ><sZ>10 aut.</sZ><sZ>22 aut.</sZ></inist:fA14><country>Allemagne</country><wicri:noRegion>14482 Potsdam</wicri:noRegion><wicri:noRegion>An der Sterwarte 16</wicri:noRegion><wicri:noRegion>14482 Potsdam</wicri:noRegion></affiliation><affiliation wicri:level="1"><inist:fA14 i1="14"><s1>INAF Osservatorio Astronomico di Padova, Via dell'Osservatorio 8</s1><s2>Asiago 36012</s2><s3>ITA</s3><sZ>17 aut.</sZ><sZ>22 aut.</sZ></inist:fA14><country>Italie</country><wicri:noRegion>Asiago 36012</wicri:noRegion></affiliation></author><author><name sortKey="Watson, F G" sort="Watson, F G" uniqKey="Watson F" first="F. G." last="Watson">F. G. Watson</name><affiliation wicri:level="1"><inist:fA14 i1="03"><s1>Australian Astronomical Observatory, P.O. Box 296</s1><s2>Epping, NSW 1710</s2><s3>AUS</s3><sZ>4 aut.</sZ><sZ>19 aut.</sZ><sZ>23 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>Epping, NSW 1710</wicri:noRegion></affiliation></author><author><name sortKey="Wyse, R F G" sort="Wyse, R F G" uniqKey="Wyse R" first="R. F. G." last="Wyse">R. F. G. Wyse</name><affiliation wicri:level="1"><inist:fA14 i1="10"><s1>Department of Physics and Astronomy, Johns Hopkins University, 3400 N Charles Street</s1><s2>Baltimore, MD 21218</s2><s3>USA</s3><sZ>13 aut.</sZ><sZ>24 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Baltimore, MD 21218</wicri:noRegion></affiliation></author><author><name sortKey="Zwitter, T" sort="Zwitter, T" uniqKey="Zwitter T" first="T." last="Zwitter">T. Zwitter</name><affiliation wicri:level="1"><inist:fA14 i1="17"><s1>Faculty of Mathematics and Physics, University of Ljubljana</s1><s2>Ljubljana</s2><s3>SVN</s3><sZ>25 aut.</sZ></inist:fA14><country>Slovénie</country><wicri:noRegion>Ljubljana</wicri:noRegion></affiliation><affiliation wicri:level="1"><inist:fA14 i1="18"><s1>Center of Excellence SPACE-SI</s1><s2>Ljubljana</s2><s3>SVN</s3><sZ>25 aut.</sZ></inist:fA14><country>Slovénie</country><wicri:noRegion>Center of Excellence SPACE-SI</wicri:noRegion></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">INIST</idno><idno type="inist">11-0171778</idno><date when="2011">2011</date><idno type="stanalyst">PASCAL 11-0171778 INIST</idno><idno type="RBID">Pascal:11-0171778</idno><idno type="wicri:Area/PascalFrancis/Corpus">001E65</idno><idno type="wicri:Area/PascalFrancis/Curation">004072</idno><idno type="wicri:Area/PascalFrancis/Checkpoint">001629</idno><idno type="wicri:explorRef" wicri:stream="PascalFrancis" wicri:step="Checkpoint">001629</idno><idno type="wicri:doubleKey">0004-637X:2011:Williams M:the:dawning:of</idno><idno type="wicri:Area/Main/Merge">006A80</idno><idno type="wicri:Area/Main/Curation">006679</idno><idno type="wicri:Area/Main/Exploration">006679</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">THE DAWNING OF THE STREAM OF AQUARIUS IN RAVE</title><author><name sortKey="Williams, M E K" sort="Williams, M E K" uniqKey="Williams M" first="M. E. K." last="Williams">M. E. K. Williams</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Astrophysikalisches Institut Potsdam, An der Sterwarte 16</s1><s2>14482 Potsdam</s2><s3>DEU</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>5 aut.</sZ><sZ>10 aut.</sZ><sZ>22 aut.</sZ></inist:fA14><country>Allemagne</country><wicri:noRegion>14482 Potsdam</wicri:noRegion><wicri:noRegion>An der Sterwarte 16</wicri:noRegion><wicri:noRegion>14482 Potsdam</wicri:noRegion></affiliation></author><author><name sortKey="Steinmetz, M" sort="Steinmetz, M" uniqKey="Steinmetz M" first="M." last="Steinmetz">M. Steinmetz</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Astrophysikalisches Institut Potsdam, An der Sterwarte 16</s1><s2>14482 Potsdam</s2><s3>DEU</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>5 aut.</sZ><sZ>10 aut.</sZ><sZ>22 aut.</sZ></inist:fA14><country>Allemagne</country><wicri:noRegion>14482 Potsdam</wicri:noRegion><wicri:noRegion>An der Sterwarte 16</wicri:noRegion><wicri:noRegion>14482 Potsdam</wicri:noRegion></affiliation></author><author><name sortKey="Sharma, S" sort="Sharma, S" uniqKey="Sharma S" first="S." last="Sharma">S. Sharma</name><affiliation wicri:level="4"><inist:fA14 i1="02"><s1>School of Physics, University of Sydney</s1><s2>NSW-2006</s2><s3>AUS</s3><sZ>3 aut.</sZ></inist:fA14><country>Australie</country><placeName><settlement type="city">Sydney</settlement><region type="état">Nouvelle-Galles du Sud</region></placeName><orgName type="university">Université de Sydney</orgName></affiliation></author><author><name sortKey="Bland Hawthorn, J" sort="Bland Hawthorn, J" uniqKey="Bland Hawthorn J" first="J." last="Bland-Hawthorn">J. Bland-Hawthorn</name><affiliation wicri:level="1"><inist:fA14 i1="03"><s1>Australian Astronomical Observatory, P.O. Box 296</s1><s2>Epping, NSW 1710</s2><s3>AUS</s3><sZ>4 aut.</sZ><sZ>19 aut.</sZ><sZ>23 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>Epping, NSW 1710</wicri:noRegion></affiliation></author><author><name sortKey="De Jong, R S" sort="De Jong, R S" uniqKey="De Jong R" first="R. S." last="De Jong">R. S. De Jong</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Astrophysikalisches Institut Potsdam, An der Sterwarte 16</s1><s2>14482 Potsdam</s2><s3>DEU</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>5 aut.</sZ><sZ>10 aut.</sZ><sZ>22 aut.</sZ></inist:fA14><country>Allemagne</country><wicri:noRegion>14482 Potsdam</wicri:noRegion><wicri:noRegion>An der Sterwarte 16</wicri:noRegion><wicri:noRegion>14482 Potsdam</wicri:noRegion></affiliation></author><author><name sortKey="Seabroke, G M" sort="Seabroke, G M" uniqKey="Seabroke G" first="G. M." last="Seabroke">G. M. Seabroke</name><affiliation wicri:level="4"><inist:fA14 i1="04"><s1>Mullard Space Science Laboratory, University College London, Holmbury St Mary</s1><s2>Dorking, RH5 6NT</s2><s3>GBR</s3><sZ>6 aut.</sZ></inist:fA14><country>Royaume-Uni</country><wicri:noRegion>Dorking, RH5 6NT</wicri:noRegion><orgName type="university">University College de Londres</orgName><placeName><settlement type="city">Londres</settlement><region type="country">Angleterre</region><region type="région" nuts="1">Grand Londres</region></placeName></affiliation></author><author><name sortKey="Helmi, A" sort="Helmi, A" uniqKey="Helmi A" first="A." last="Helmi">A. Helmi</name><affiliation wicri:level="4"><inist:fA14 i1="05"><s1>Kapteyn Astronomical Institute, University of Groningen, Postbus 800</s1><s2>9700 AV Groningen</s2><s3>NLD</s3><sZ>7 aut.</sZ></inist:fA14><country>Pays-Bas</country><wicri:noRegion>9700 AV Groningen</wicri:noRegion><orgName type="university">Université de Groningue</orgName><placeName><settlement type="city">Groningue (ville)</settlement><region>Groningue (province)</region></placeName></affiliation></author><author><name sortKey="Freeman, K C" sort="Freeman, K C" uniqKey="Freeman K" first="K. C." last="Freeman">K. C. Freeman</name><affiliation wicri:level="1"><inist:fA14 i1="06"><s1>RSAA Australian National University, Mount Stromlo Observatory, Cotter Road, Weston Creek</s1><s2>Canberra, ACT 72611</s2><s3>AUS</s3><sZ>8 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>Canberra, ACT 72611</wicri:noRegion></affiliation></author><author><name sortKey="Binney, J" sort="Binney, J" uniqKey="Binney J" first="J." last="Binney">J. Binney</name><affiliation wicri:level="4"><inist:fA14 i1="07"><s1>Rudolf Pierls Center for Theoretical Physics, University of Oxford, 1 Keble Road</s1><s2>Oxford OX1 3NP</s2><s3>GBR</s3><sZ>9 aut.</sZ></inist:fA14><country>Royaume-Uni</country><wicri:noRegion>Oxford OX1 3NP</wicri:noRegion><orgName type="university">Université d'Oxford</orgName><placeName><settlement type="city">Oxford</settlement><region type="nation">Angleterre</region><region type="région" nuts="1">Oxfordshire</region></placeName></affiliation></author><author><name sortKey="Minchev, I" sort="Minchev, I" uniqKey="Minchev I" first="I." last="Minchev">I. Minchev</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Astrophysikalisches Institut Potsdam, An der Sterwarte 16</s1><s2>14482 Potsdam</s2><s3>DEU</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>5 aut.</sZ><sZ>10 aut.</sZ><sZ>22 aut.</sZ></inist:fA14><country>Allemagne</country><wicri:noRegion>14482 Potsdam</wicri:noRegion><wicri:noRegion>An der Sterwarte 16</wicri:noRegion><wicri:noRegion>14482 Potsdam</wicri:noRegion></affiliation></author><author><name sortKey="Bienayme, O" sort="Bienayme, O" uniqKey="Bienayme O" first="O." last="Bienayme">O. Bienayme</name><affiliation wicri:level="4"><inist:fA14 i1="08"><s1>Observatoire astronomique de Strasbourg, Université de Strasbourg, CNRS, UMR 7550</s1><s2>Strasbourg</s2><s3>FRA</s3><sZ>11 aut.</sZ><sZ>21 aut.</sZ></inist:fA14><country>France</country><placeName><region type="region">Grand Est</region><region type="old region">Alsace (région administrative)</region><settlement type="city">Strasbourg</settlement><settlement type="city">Strasbourg</settlement></placeName><orgName type="university">Université de Strasbourg</orgName></affiliation></author><author><name sortKey="Campbell, R" sort="Campbell, R" uniqKey="Campbell R" first="R." last="Campbell">R. Campbell</name><affiliation wicri:level="2"><inist:fA14 i1="09"><s1>Department of Physics and Astronomy, Western Kentucky University</s1><s2>Bowling Green, Kentucky</s2><s3>USA</s3><sZ>12 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">Kentucky</region></placeName></affiliation></author><author><name sortKey="Fulbright, J P" sort="Fulbright, J P" uniqKey="Fulbright J" first="J. P." last="Fulbright">J. P. Fulbright</name><affiliation wicri:level="1"><inist:fA14 i1="10"><s1>Department of Physics and Astronomy, Johns Hopkins University, 3400 N Charles Street</s1><s2>Baltimore, MD 21218</s2><s3>USA</s3><sZ>13 aut.</sZ><sZ>24 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Baltimore, MD 21218</wicri:noRegion></affiliation></author><author><name sortKey="Gibson, B K" sort="Gibson, B K" uniqKey="Gibson B" first="B. K." last="Gibson">B. K. Gibson</name><affiliation wicri:level="1"><inist:fA14 i1="11"><s1>Jeremiah Horrocks Institute for Astrophysics & Super-computing, University of Central Lancashire</s1><s2>Preston</s2><s3>GBR</s3><sZ>14 aut.</sZ></inist:fA14><country>Royaume-Uni</country><wicri:noRegion>Preston</wicri:noRegion></affiliation></author><author><name sortKey="Gilmore, G F" sort="Gilmore, G F" uniqKey="Gilmore G" first="G. F." last="Gilmore">G. F. Gilmore</name><affiliation wicri:level="4"><inist:fA14 i1="12"><s1>Institute of Astronomy, University of Cambridge, Madingley Road</s1><s2>Cambridge CB3 0HA</s2><s3>GBR</s3><sZ>15 aut.</sZ></inist:fA14><country>Royaume-Uni</country><wicri:noRegion>Cambridge CB3 0HA</wicri:noRegion><orgName type="university">Université de Cambridge</orgName><placeName><settlement type="city">Cambridge</settlement><region type="country">Angleterre</region><region type="région" nuts="1">Angleterre de l'Est</region></placeName></affiliation></author><author><name sortKey="Grebel, E K" sort="Grebel, E K" uniqKey="Grebel E" first="E. K." last="Grebel">E. K. Grebel</name><affiliation wicri:level="3"><inist:fA14 i1="13"><s1>Astronomisches Rechen-Institut, Zentrum für Astronomie der Universität Heidelberg</s1><s2>69120 Heidelberg</s2><s3>DEU</s3><sZ>16 aut.</sZ></inist:fA14><country>Allemagne</country><placeName><region type="land" nuts="1">Bade-Wurtemberg</region><region type="district" nuts="2">District de Karlsruhe</region><settlement type="city">Heidelberg</settlement></placeName></affiliation></author><author><name sortKey="Munari, U" sort="Munari, U" uniqKey="Munari U" first="U." last="Munari">U. Munari</name><affiliation wicri:level="1"><inist:fA14 i1="14"><s1>INAF Osservatorio Astronomico di Padova, Via dell'Osservatorio 8</s1><s2>Asiago 36012</s2><s3>ITA</s3><sZ>17 aut.</sZ><sZ>22 aut.</sZ></inist:fA14><country>Italie</country><wicri:noRegion>Asiago 36012</wicri:noRegion></affiliation></author><author><name sortKey="Navarro, J F" sort="Navarro, J F" uniqKey="Navarro J" first="J. F." last="Navarro">J. F. Navarro</name><affiliation wicri:level="1"><inist:fA14 i1="15"><s1>Department of Physics and Astronomy, University of Victoria, P.O. Box 3055, Station CSC</s1><s2>Victoria, BC V8W 3P6</s2><s3>CAN</s3><sZ>18 aut.</sZ></inist:fA14><country>Canada</country><wicri:noRegion>Victoria, BC V8W 3P6</wicri:noRegion></affiliation></author><author><name sortKey="Parker, Q A" sort="Parker, Q A" uniqKey="Parker Q" first="Q. A." last="Parker">Q. A. Parker</name><affiliation wicri:level="1"><inist:fA14 i1="03"><s1>Australian Astronomical Observatory, P.O. Box 296</s1><s2>Epping, NSW 1710</s2><s3>AUS</s3><sZ>4 aut.</sZ><sZ>19 aut.</sZ><sZ>23 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>Epping, NSW 1710</wicri:noRegion></affiliation><affiliation wicri:level="1"><inist:fA14 i1="16"><s1>Department of Physics and Astronomy, Macquarie University</s1><s2>Sydney, NSW 2109</s2><s3>AUS</s3><sZ>19 aut.</sZ><sZ>20 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>Sydney, NSW 2109</wicri:noRegion></affiliation></author><author><name sortKey="Reid, W" sort="Reid, W" uniqKey="Reid W" first="W." last="Reid">W. Reid</name><affiliation wicri:level="1"><inist:fA14 i1="16"><s1>Department of Physics and Astronomy, Macquarie University</s1><s2>Sydney, NSW 2109</s2><s3>AUS</s3><sZ>19 aut.</sZ><sZ>20 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>Sydney, NSW 2109</wicri:noRegion></affiliation></author><author><name sortKey="Siebert, A" sort="Siebert, A" uniqKey="Siebert A" first="A." last="Siebert">A. Siebert</name><affiliation wicri:level="4"><inist:fA14 i1="08"><s1>Observatoire astronomique de Strasbourg, Université de Strasbourg, CNRS, UMR 7550</s1><s2>Strasbourg</s2><s3>FRA</s3><sZ>11 aut.</sZ><sZ>21 aut.</sZ></inist:fA14><country>France</country><placeName><region type="region">Grand Est</region><region type="old region">Alsace (région administrative)</region><settlement type="city">Strasbourg</settlement><settlement type="city">Strasbourg</settlement></placeName><orgName type="university">Université de Strasbourg</orgName></affiliation></author><author><name sortKey="Siviero, A" sort="Siviero, A" uniqKey="Siviero A" first="A." last="Siviero">A. Siviero</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Astrophysikalisches Institut Potsdam, An der Sterwarte 16</s1><s2>14482 Potsdam</s2><s3>DEU</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>5 aut.</sZ><sZ>10 aut.</sZ><sZ>22 aut.</sZ></inist:fA14><country>Allemagne</country><wicri:noRegion>14482 Potsdam</wicri:noRegion><wicri:noRegion>An der Sterwarte 16</wicri:noRegion><wicri:noRegion>14482 Potsdam</wicri:noRegion></affiliation><affiliation wicri:level="1"><inist:fA14 i1="14"><s1>INAF Osservatorio Astronomico di Padova, Via dell'Osservatorio 8</s1><s2>Asiago 36012</s2><s3>ITA</s3><sZ>17 aut.</sZ><sZ>22 aut.</sZ></inist:fA14><country>Italie</country><wicri:noRegion>Asiago 36012</wicri:noRegion></affiliation></author><author><name sortKey="Watson, F G" sort="Watson, F G" uniqKey="Watson F" first="F. G." last="Watson">F. G. Watson</name><affiliation wicri:level="1"><inist:fA14 i1="03"><s1>Australian Astronomical Observatory, P.O. Box 296</s1><s2>Epping, NSW 1710</s2><s3>AUS</s3><sZ>4 aut.</sZ><sZ>19 aut.</sZ><sZ>23 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>Epping, NSW 1710</wicri:noRegion></affiliation></author><author><name sortKey="Wyse, R F G" sort="Wyse, R F G" uniqKey="Wyse R" first="R. F. G." last="Wyse">R. F. G. Wyse</name><affiliation wicri:level="1"><inist:fA14 i1="10"><s1>Department of Physics and Astronomy, Johns Hopkins University, 3400 N Charles Street</s1><s2>Baltimore, MD 21218</s2><s3>USA</s3><sZ>13 aut.</sZ><sZ>24 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Baltimore, MD 21218</wicri:noRegion></affiliation></author><author><name sortKey="Zwitter, T" sort="Zwitter, T" uniqKey="Zwitter T" first="T." last="Zwitter">T. Zwitter</name><affiliation wicri:level="1"><inist:fA14 i1="17"><s1>Faculty of Mathematics and Physics, University of Ljubljana</s1><s2>Ljubljana</s2><s3>SVN</s3><sZ>25 aut.</sZ></inist:fA14><country>Slovénie</country><wicri:noRegion>Ljubljana</wicri:noRegion></affiliation><affiliation wicri:level="1"><inist:fA14 i1="18"><s1>Center of Excellence SPACE-SI</s1><s2>Ljubljana</s2><s3>SVN</s3><sZ>25 aut.</sZ></inist:fA14><country>Slovénie</country><wicri:noRegion>Center of Excellence SPACE-SI</wicri:noRegion></affiliation></author></analytic><series><title level="j" type="main">The Astrophysical journal</title><title level="j" type="abbreviated">Astrophys. j.</title><idno type="ISSN">0004-637X</idno><imprint><date when="2011">2011</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">The Astrophysical journal</title><title level="j" type="abbreviated">Astrophys. j.</title><idno type="ISSN">0004-637X</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Dwarf galaxies</term><term>Dynamic model</term><term>Dynamics</term><term>Galaxy clusters</term><term>Galaxy formation</term><term>Galaxy halo</term><term>Globular clusters</term><term>Isochrone</term><term>Kinematics</term><term>Localization</term><term>Metallicity</term><term>Radial distribution</term><term>Radial velocity</term><term>Satellite galaxies</term><term>Solar neighborhood</term><term>Star clusters</term><term>Substructure</term><term>Velocity distribution</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Vitesse radiale</term><term>Distribution radiale</term><term>Distribution vitesse</term><term>Galaxies compagnons</term><term>Modèle dynamique</term><term>Métallicité</term><term>Isochrone</term><term>Sous structure</term><term>Halo galaxies</term><term>Localisation</term><term>Galaxies naines</term><term>Amas galaxies</term><term>Amas globulaire</term><term>Formation galaxies</term><term>Cinématique</term><term>Dynamique</term><term>Voisinage solaire</term><term>Amas stellaire</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">We identify a new, nearby (0.5 kpc ? d ? 10 kpc) stream in data from the RAdial Velocity Experiment (RAVE). As the majority of stars in the stream lie in the constellation of Aquarius, we name it the Aquarius Stream. We identify 15 members of the stream lying between 30° < l < 75° and -70° < b < -50°, with heliocentric line-of-sight velocities V<sub>los</sub> ∼ -200 km s<sup>-1</sup>. The members are outliers in the radial velocity distribution, and the overdensity is statistically significant when compared to mock samples created with both the Besançon Galaxy model and newly developed code Galaxia. The metallicity distribution function and isochrone fit in the log g-T<sub>eff</sub> plane suggest that the stream consists of a 10 Gyr old population with [M/H] ∼ -1.0. We explore relations to other streams and substructures, finding that the stream cannot be identified with known structures: it is a new, nearby substructure in the Galaxy's halo. Using a simple dynamical model of a dissolving satellite galaxy, we account for the localization of the stream. We find that the stream is dynamically young and therefore likely the debris of a recently disrupted dwarf galaxy or globular cluster. The Aquarius stream is thus a specimen of ongoing hierarchical Galaxy formation, rare for being right in the solar suburb.</div></front></TEI><affiliations><list><country><li>Allemagne</li><li>Australie</li><li>Canada</li><li>France</li><li>Italie</li><li>Pays-Bas</li><li>Royaume-Uni</li><li>Slovénie</li><li>États-Unis</li></country><region><li>Alsace (région administrative)</li><li>Angleterre</li><li>Angleterre de l'Est</li><li>Bade-Wurtemberg</li><li>District de Karlsruhe</li><li>Grand Est</li><li>Grand Londres</li><li>Groningue (province)</li><li>Kentucky</li><li>Nouvelle-Galles du Sud</li><li>Oxfordshire</li></region><settlement><li>Cambridge</li><li>Groningue (ville)</li><li>Heidelberg</li><li>Londres</li><li>Oxford</li><li>Strasbourg</li><li>Sydney</li></settlement><orgName><li>University College de Londres</li><li>Université d'Oxford</li><li>Université de Cambridge</li><li>Université de Groningue</li><li>Université de Strasbourg</li><li>Université de Sydney</li></orgName></list><tree><country name="Allemagne"><noRegion><name sortKey="Williams, M E K" sort="Williams, M E K" uniqKey="Williams M" first="M. E. K." last="Williams">M. E. K. Williams</name></noRegion><name sortKey="De Jong, R S" sort="De Jong, R S" uniqKey="De Jong R" first="R. S." last="De Jong">R. S. De Jong</name><name sortKey="Grebel, E K" sort="Grebel, E K" uniqKey="Grebel E" first="E. K." last="Grebel">E. K. Grebel</name><name sortKey="Minchev, I" sort="Minchev, I" uniqKey="Minchev I" first="I." last="Minchev">I. Minchev</name><name sortKey="Siviero, A" sort="Siviero, A" uniqKey="Siviero A" first="A." last="Siviero">A. Siviero</name><name sortKey="Steinmetz, M" sort="Steinmetz, M" uniqKey="Steinmetz M" first="M." last="Steinmetz">M. Steinmetz</name></country><country name="Australie"><region name="Nouvelle-Galles du Sud"><name sortKey="Sharma, S" sort="Sharma, S" uniqKey="Sharma S" first="S." last="Sharma">S. Sharma</name></region><name sortKey="Bland Hawthorn, J" sort="Bland Hawthorn, J" uniqKey="Bland Hawthorn J" first="J." last="Bland-Hawthorn">J. Bland-Hawthorn</name><name sortKey="Freeman, K C" sort="Freeman, K C" uniqKey="Freeman K" first="K. C." last="Freeman">K. C. Freeman</name><name sortKey="Parker, Q A" sort="Parker, Q A" uniqKey="Parker Q" first="Q. A." last="Parker">Q. A. Parker</name><name sortKey="Parker, Q A" sort="Parker, Q A" uniqKey="Parker Q" first="Q. A." last="Parker">Q. A. Parker</name><name sortKey="Reid, W" sort="Reid, W" uniqKey="Reid W" first="W." last="Reid">W. Reid</name><name sortKey="Watson, F G" sort="Watson, F G" uniqKey="Watson F" first="F. G." last="Watson">F. G. Watson</name></country><country name="Royaume-Uni"><region name="Angleterre"><name sortKey="Seabroke, G M" sort="Seabroke, G M" uniqKey="Seabroke G" first="G. M." last="Seabroke">G. M. Seabroke</name></region><name sortKey="Binney, J" sort="Binney, J" uniqKey="Binney J" first="J." last="Binney">J. Binney</name><name sortKey="Gibson, B K" sort="Gibson, B K" uniqKey="Gibson B" first="B. K." last="Gibson">B. K. Gibson</name><name sortKey="Gilmore, G F" sort="Gilmore, G F" uniqKey="Gilmore G" first="G. F." last="Gilmore">G. F. Gilmore</name></country><country name="Pays-Bas"><region name="Groningue (province)"><name sortKey="Helmi, A" sort="Helmi, A" uniqKey="Helmi A" first="A." last="Helmi">A. Helmi</name></region></country><country name="France"><region name="Grand Est"><name sortKey="Bienayme, O" sort="Bienayme, O" uniqKey="Bienayme O" first="O." last="Bienayme">O. Bienayme</name></region><name sortKey="Siebert, A" sort="Siebert, A" uniqKey="Siebert A" first="A." last="Siebert">A. Siebert</name></country><country name="États-Unis"><region name="Kentucky"><name sortKey="Campbell, R" sort="Campbell, R" uniqKey="Campbell R" first="R." last="Campbell">R. Campbell</name></region><name sortKey="Fulbright, J P" sort="Fulbright, J P" uniqKey="Fulbright J" first="J. P." last="Fulbright">J. P. Fulbright</name><name sortKey="Wyse, R F G" sort="Wyse, R F G" uniqKey="Wyse R" first="R. F. G." last="Wyse">R. F. G. Wyse</name></country><country name="Italie"><noRegion><name sortKey="Munari, U" sort="Munari, U" uniqKey="Munari U" first="U." last="Munari">U. Munari</name></noRegion><name sortKey="Siviero, A" sort="Siviero, A" uniqKey="Siviero A" first="A." last="Siviero">A. Siviero</name></country><country name="Canada"><noRegion><name sortKey="Navarro, J F" sort="Navarro, J F" uniqKey="Navarro J" first="J. F." last="Navarro">J. F. Navarro</name></noRegion></country><country name="Slovénie"><noRegion><name sortKey="Zwitter, T" sort="Zwitter, T" uniqKey="Zwitter T" first="T." last="Zwitter">T. Zwitter</name></noRegion><name sortKey="Zwitter, T" sort="Zwitter, T" uniqKey="Zwitter T" first="T." last="Zwitter">T. Zwitter</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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