The kinematic identification of a thick stellar disc in M31
Identifieur interne : 006305 ( Main/Exploration ); précédent : 006304; suivant : 006306The kinematic identification of a thick stellar disc in M31
Auteurs : M. L. M. Collins [Royaume-Uni] ; S. C. Chapman [Royaume-Uni] ; R. A. Ibata [France] ; M. J. Irwin [Royaume-Uni] ; R. M. Rich [États-Unis] ; A. M. N. Ferguson [Royaume-Uni] ; G. F. Lewis [Australie] ; N. Tanvir ; A. KochSource :
- Monthly Notices of the Royal Astronomical Society [ 0035-8711 ] ; 2011-05-21.
Descripteurs français
- Pascal (Inist)
English descriptors
- KwdEn :
- Abundance, Average dispersion, Average metallicities, Average metallicity, Average properties, Average velocity, Binney, Bottom panel, Bullock, Carollo, Chemin, Circular orbits, Classical disc, Colours, Component, Composite spectra, Composite spectrum, Contamination, Dalcanton, Deimos, Deimos instrument, Density ratio, Disc, Disc frame, Disc galaxies, Disc model, Dispersion, Eld, Exponential, Formation mechanism, Galaxy, Galaxy evolution, Galaxy structure, Gaussian, Gaussian cuts, Gilmore, Halo, Hernquist, Histogram, Ibata, Individual stars, Internal heating, Irwin, Isochrone, Ivezi, Kazantzidis, Kinematic, Kinematics, Large errors, Large radii, Linear relation, Lines grating, Local group, Lower panel, Mars satellite, Mcconnachie, Median, Metallicities, Metallicity, Middle panel, Milky Way, Mnras, Model data, Monthly notices, More metal, Nrich binney, Outer disc, Photometric, Possible formation mechanisms, Present epoch, Purcell, Quinn, Radius, Recent work, Rotation curve, Same analysis, Scaleheight, Scaleheights, Scalelength, Scalelengths, Scenario, Selection criteria, Solid lines, Spectroscopic, Spiral galaxies, Stellar, Stellar density, Stellar disc, Stellar discs, Stellar dynamics, Stellar kinematics, Structural properties, Tanvir, Thick component, Thick disc, Thick discs, Thin disc, Thin discs, Total number, Tted, Velocity dispersion, Velocity dispersions, Walterbos, Walterbos kennicutt, Yoachim, Yoachim dalcanton.
- Teeft :
- Average dispersion, Average metallicities, Average metallicity, Average properties, Average velocity, Binney, Bottom panel, Bullock, Carollo, Chemin, Circular orbits, Classical disc, Colours, Component, Composite spectra, Composite spectrum, Contamination, Dalcanton, Deimos, Deimos instrument, Density ratio, Disc, Disc frame, Disc galaxies, Disc model, Dispersion, Eld, Exponential, Galaxy, Gaussian, Gaussian cuts, Gilmore, Halo, Hernquist, Histogram, Ibata, Individual stars, Internal heating, Irwin, Isochrone, Ivezi, Kazantzidis, Kinematic, Kinematics, Large errors, Large radii, Linear relation, Lines grating, Lower panel, Mcconnachie, Median, Metallicities, Metallicity, Middle panel, Mnras, Model data, Monthly notices, More metal, Nrich binney, Outer disc, Photometric, Possible formation mechanisms, Present epoch, Purcell, Quinn, Radius, Recent work, Rotation curve, Same analysis, Scaleheight, Scaleheights, Scalelength, Scalelengths, Scenario, Selection criteria, Solid lines, Spectroscopic, Spiral galaxies, Stellar, Stellar density, Stellar disc, Stellar discs, Structural properties, Tanvir, Thick component, Thick disc, Thick discs, Thin disc, Thin discs, Total number, Tted, Velocity dispersion, Velocity dispersions, Walterbos, Walterbos kennicutt, Yoachim, Yoachim dalcanton.
Abstract
We present the first characterization of a thick‐disc component in the Andromeda galaxy (M31) using kinematic data from the DEIMOS instrument on Keck II. Using 21 fields in the south‐west of the galaxy, we measure the lag of this component with respect to the thin disc, as well as the dispersion, metallicity and scalelength of the component. We find an average lag between the two components of 〈Δv〉= 46.0 ± 3.9 km s−1. The velocity dispersion of the thick disc is σthick= 50.8 ± 1.9 km s−1, greater than the value of dispersion we determine for the thin disc, σthin= 35.7 ± 1.0 km s−1. The thick disc is more metal poor than the thin disc, with [Fe/H]spec=−1.0 ± 0.1 compared with [Fe/H]spec=−0.7 ± 0.05 for the thin disc. We measure a radial scalelength of the thin and thick discs of hr= 7.3 ± 1.0 and 8.0 ± 1.2 kpc, respectively. From this, we infer scaleheights for both discs of 1.1 ± 0.2 and 2.8 ± 0.6 kpc, both of which are approximately two to three times larger than those observed in the Milky Way. We estimate a mass range for the thick‐disc component of 2.4 × 1010 < M*, thick < 4.1 × 1010 M⊙. This value provides a useful constraint on possible formation mechanisms, as any proposed method for forming a thick disc must be able to heat (or deposit) at least this amount of material.
Url:
DOI: 10.1111/j.1365-2966.2011.18238.x
Affiliations:
- Australie, France, Royaume-Uni, États-Unis
- Angleterre, Angleterre de l'Est, Californie, Nouvelle-Galles du Sud, Écosse
- Cambridge, Sydney, Édimbourg
- Université d'Édimbourg, Université de Cambridge, Université de Sydney
Links toward previous steps (curation, corpus...)
- to stream Istex, to step Corpus: 002383
- to stream Istex, to step Curation: 002383
- to stream Istex, to step Checkpoint: 000724
- to stream Main, to step Merge: 006681
- to stream PascalFrancis, to step Corpus: 001D11
- to stream PascalFrancis, to step Curation: 004232
- to stream PascalFrancis, to step Checkpoint: 001564
- to stream Main, to step Merge: 006A15
- to stream Main, to step Curation: 006305
Le document en format XML
<record><TEI wicri:istexFullTextTei="biblStruct"><teiHeader><fileDesc><titleStmt><title xml:lang="en">The kinematic identification of a thick stellar disc in M31</title><author><name sortKey="Collins, M L M" sort="Collins, M L M" uniqKey="Collins M" first="M. L. M." last="Collins">M. L. M. Collins</name></author><author><name sortKey="Chapman, S C" sort="Chapman, S C" uniqKey="Chapman S" first="S. C." last="Chapman">S. C. Chapman</name></author><author><name sortKey="Ibata, R A" sort="Ibata, R A" uniqKey="Ibata R" first="R. A." last="Ibata">R. A. Ibata</name></author><author><name sortKey="Irwin, M J" sort="Irwin, M J" uniqKey="Irwin M" first="M. J." last="Irwin">M. J. Irwin</name></author><author><name sortKey="Rich, R M" sort="Rich, R M" uniqKey="Rich R" first="R. M." last="Rich">R. M. Rich</name></author><author><name sortKey="Ferguson, A M N" sort="Ferguson, A M N" uniqKey="Ferguson A" first="A. M. N." last="Ferguson">A. M. N. Ferguson</name></author><author><name sortKey="Lewis, G F" sort="Lewis, G F" uniqKey="Lewis G" first="G. F." last="Lewis">G. F. Lewis</name></author><author><name sortKey="Tanvir, N" sort="Tanvir, N" uniqKey="Tanvir N" first="N." last="Tanvir">N. Tanvir</name></author><author><name sortKey="Koch, A" sort="Koch, A" uniqKey="Koch A" first="A." last="Koch">A. Koch</name></author></titleStmt><publicationStmt><idno type="wicri:source">ISTEX</idno><idno type="RBID">ISTEX:C0D673980181B32B7FEF7F5B4B1D6B1271E999C9</idno><date when="2011" year="2011">2011</date><idno type="doi">10.1111/j.1365-2966.2011.18238.x</idno><idno type="url">https://api.istex.fr/document/C0D673980181B32B7FEF7F5B4B1D6B1271E999C9/fulltext/pdf</idno><idno type="wicri:Area/Istex/Corpus">002383</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Corpus" wicri:corpus="ISTEX">002383</idno><idno type="wicri:Area/Istex/Curation">002383</idno><idno type="wicri:Area/Istex/Checkpoint">000724</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Checkpoint">000724</idno><idno type="wicri:doubleKey">0035-8711:2011:Collins M:the:kinematic:identification</idno><idno type="wicri:Area/Main/Merge">006681</idno><idno type="wicri:source">INIST</idno><idno type="RBID">Pascal:11-0260679</idno><idno type="wicri:Area/PascalFrancis/Corpus">001D11</idno><idno type="wicri:Area/PascalFrancis/Curation">004232</idno><idno type="wicri:Area/PascalFrancis/Checkpoint">001564</idno><idno type="wicri:explorRef" wicri:stream="PascalFrancis" wicri:step="Checkpoint">001564</idno><idno type="wicri:doubleKey">0035-8711:2011:Collins M:the:kinematic:identification</idno><idno type="wicri:Area/Main/Merge">006A15</idno><idno type="wicri:Area/Main/Curation">006305</idno><idno type="wicri:Area/Main/Exploration">006305</idno></publicationStmt><sourceDesc><biblStruct><analytic><title level="a" type="main">The kinematic identification of a thick stellar disc in M31<ref type="note" target="#fn1 #fn2"><hi rend="superscript">★</hi>†</ref></title><author><name sortKey="Collins, M L M" sort="Collins, M L M" uniqKey="Collins M" first="M. L. M." last="Collins">M. L. M. Collins</name><affiliation wicri:level="4"><orgName type="university">Université de Cambridge</orgName><country>Royaume-Uni</country><placeName><settlement type="city">Cambridge</settlement><region type="country">Angleterre</region><region type="région" nuts="1">Angleterre de l'Est</region></placeName></affiliation><affiliation wicri:level="1"><country wicri:rule="url">Royaume-Uni</country></affiliation></author><author><name sortKey="Chapman, S C" sort="Chapman, S C" uniqKey="Chapman S" first="S. C." last="Chapman">S. C. Chapman</name><affiliation wicri:level="4"><orgName type="university">Université de Cambridge</orgName><country>Royaume-Uni</country><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="Ibata, R A" sort="Ibata, R A" uniqKey="Ibata R" first="R. A." last="Ibata">R. A. Ibata</name><affiliation wicri:level="1"><country xml:lang="fr">France</country><wicri:regionArea>Observatoire de Strasbourg, 11 rue de l’Université, F‐67000 Strasbourg</wicri:regionArea><wicri:noRegion>67000 Strasbourg</wicri:noRegion><wicri:noRegion>F‐67000 Strasbourg</wicri:noRegion></affiliation></author><author><name sortKey="Irwin, M J" sort="Irwin, M J" uniqKey="Irwin M" first="M. J." last="Irwin">M. J. Irwin</name><affiliation wicri:level="4"><orgName type="university">Université de Cambridge</orgName><country>Royaume-Uni</country><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="Rich, R M" sort="Rich, R M" uniqKey="Rich R" first="R. M." last="Rich">R. M. Rich</name><affiliation wicri:level="2"><country xml:lang="fr">États-Unis</country><wicri:regionArea>Department of Physics and Astronomy, University of California, Los Angeles, CA 90095‐1547</wicri:regionArea><placeName><region type="state">Californie</region></placeName></affiliation></author><author><name sortKey="Ferguson, A M N" sort="Ferguson, A M N" uniqKey="Ferguson A" first="A. M. N." last="Ferguson">A. M. N. Ferguson</name><affiliation wicri:level="4"><orgName type="university">Université d'Édimbourg</orgName><country>Royaume-Uni</country><placeName><settlement type="city">Édimbourg</settlement><region type="country">Écosse</region></placeName></affiliation></author><author><name sortKey="Lewis, G F" sort="Lewis, G F" uniqKey="Lewis G" first="G. F." last="Lewis">G. F. Lewis</name><affiliation wicri:level="4"><country xml:lang="fr">Australie</country><wicri:regionArea>Sydney Institute for Astronomy, School of Physics, A29, University of Sydney, NSW 2006</wicri:regionArea><orgName type="university">Université de Sydney</orgName><placeName><settlement type="city">Sydney</settlement><region type="état">Nouvelle-Galles du Sud</region></placeName></affiliation></author><author><name sortKey="Tanvir, N" sort="Tanvir, N" uniqKey="Tanvir N" first="N." last="Tanvir">N. Tanvir</name><affiliation><wicri:noCountry code="subField">7RH</wicri:noCountry></affiliation></author><author><name sortKey="Koch, A" sort="Koch, A" uniqKey="Koch A" first="A." last="Koch">A. Koch</name><affiliation><wicri:noCountry code="subField">7RH</wicri:noCountry></affiliation></author></analytic><monogr></monogr><series><title level="j" type="main">Monthly Notices of the Royal Astronomical Society</title><title level="j" type="alt">MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY</title><idno type="ISSN">0035-8711</idno><idno type="eISSN">1365-2966</idno><imprint><biblScope unit="vol">413</biblScope><biblScope unit="issue">3</biblScope><biblScope unit="page" from="1548">1548</biblScope><biblScope unit="page" to="1568">1568</biblScope><biblScope unit="page-count">21</biblScope><publisher>Blackwell Publishing Ltd</publisher><pubPlace>Oxford, UK</pubPlace><date type="published" when="2011-05-21">2011-05-21</date></imprint><idno type="ISSN">0035-8711</idno></series></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0035-8711</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Abundance</term><term>Average dispersion</term><term>Average metallicities</term><term>Average metallicity</term><term>Average properties</term><term>Average velocity</term><term>Binney</term><term>Bottom panel</term><term>Bullock</term><term>Carollo</term><term>Chemin</term><term>Circular orbits</term><term>Classical disc</term><term>Colours</term><term>Component</term><term>Composite spectra</term><term>Composite spectrum</term><term>Contamination</term><term>Dalcanton</term><term>Deimos</term><term>Deimos instrument</term><term>Density ratio</term><term>Disc</term><term>Disc frame</term><term>Disc galaxies</term><term>Disc model</term><term>Dispersion</term><term>Eld</term><term>Exponential</term><term>Formation mechanism</term><term>Galaxy</term><term>Galaxy evolution</term><term>Galaxy structure</term><term>Gaussian</term><term>Gaussian cuts</term><term>Gilmore</term><term>Halo</term><term>Hernquist</term><term>Histogram</term><term>Ibata</term><term>Individual stars</term><term>Internal heating</term><term>Irwin</term><term>Isochrone</term><term>Ivezi</term><term>Kazantzidis</term><term>Kinematic</term><term>Kinematics</term><term>Large errors</term><term>Large radii</term><term>Linear relation</term><term>Lines grating</term><term>Local group</term><term>Lower panel</term><term>Mars satellite</term><term>Mcconnachie</term><term>Median</term><term>Metallicities</term><term>Metallicity</term><term>Middle panel</term><term>Milky Way</term><term>Mnras</term><term>Model data</term><term>Monthly notices</term><term>More metal</term><term>Nrich binney</term><term>Outer disc</term><term>Photometric</term><term>Possible formation mechanisms</term><term>Present epoch</term><term>Purcell</term><term>Quinn</term><term>Radius</term><term>Recent work</term><term>Rotation curve</term><term>Same analysis</term><term>Scaleheight</term><term>Scaleheights</term><term>Scalelength</term><term>Scalelengths</term><term>Scenario</term><term>Selection criteria</term><term>Solid lines</term><term>Spectroscopic</term><term>Spiral galaxies</term><term>Stellar</term><term>Stellar density</term><term>Stellar disc</term><term>Stellar discs</term><term>Stellar dynamics</term><term>Stellar kinematics</term><term>Structural properties</term><term>Tanvir</term><term>Thick component</term><term>Thick disc</term><term>Thick discs</term><term>Thin disc</term><term>Thin discs</term><term>Total number</term><term>Tted</term><term>Velocity dispersion</term><term>Velocity dispersions</term><term>Walterbos</term><term>Walterbos kennicutt</term><term>Yoachim</term><term>Yoachim dalcanton</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Abondance</term><term>Cinématique stellaire</term><term>Deimos</term><term>Dispersion vitesse</term><term>Dynamique stellaire</term><term>Evolution galaxies</term><term>Galaxies spirales</term><term>Groupe local</term><term>Mécanisme formation</term><term>Métallicité</term><term>Satellite Mars</term><term>Structure galaxies</term><term>Voie lactée</term></keywords><keywords scheme="Teeft" xml:lang="en"><term>Average dispersion</term><term>Average metallicities</term><term>Average metallicity</term><term>Average properties</term><term>Average velocity</term><term>Binney</term><term>Bottom panel</term><term>Bullock</term><term>Carollo</term><term>Chemin</term><term>Circular orbits</term><term>Classical disc</term><term>Colours</term><term>Component</term><term>Composite spectra</term><term>Composite spectrum</term><term>Contamination</term><term>Dalcanton</term><term>Deimos</term><term>Deimos instrument</term><term>Density ratio</term><term>Disc</term><term>Disc frame</term><term>Disc galaxies</term><term>Disc model</term><term>Dispersion</term><term>Eld</term><term>Exponential</term><term>Galaxy</term><term>Gaussian</term><term>Gaussian cuts</term><term>Gilmore</term><term>Halo</term><term>Hernquist</term><term>Histogram</term><term>Ibata</term><term>Individual stars</term><term>Internal heating</term><term>Irwin</term><term>Isochrone</term><term>Ivezi</term><term>Kazantzidis</term><term>Kinematic</term><term>Kinematics</term><term>Large errors</term><term>Large radii</term><term>Linear relation</term><term>Lines grating</term><term>Lower panel</term><term>Mcconnachie</term><term>Median</term><term>Metallicities</term><term>Metallicity</term><term>Middle panel</term><term>Mnras</term><term>Model data</term><term>Monthly notices</term><term>More metal</term><term>Nrich binney</term><term>Outer disc</term><term>Photometric</term><term>Possible formation mechanisms</term><term>Present epoch</term><term>Purcell</term><term>Quinn</term><term>Radius</term><term>Recent work</term><term>Rotation curve</term><term>Same analysis</term><term>Scaleheight</term><term>Scaleheights</term><term>Scalelength</term><term>Scalelengths</term><term>Scenario</term><term>Selection criteria</term><term>Solid lines</term><term>Spectroscopic</term><term>Spiral galaxies</term><term>Stellar</term><term>Stellar density</term><term>Stellar disc</term><term>Stellar discs</term><term>Structural properties</term><term>Tanvir</term><term>Thick component</term><term>Thick disc</term><term>Thick discs</term><term>Thin disc</term><term>Thin discs</term><term>Total number</term><term>Tted</term><term>Velocity dispersion</term><term>Velocity dispersions</term><term>Walterbos</term><term>Walterbos kennicutt</term><term>Yoachim</term><term>Yoachim dalcanton</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">We present the first characterization of a thick‐disc component in the Andromeda galaxy (M31) using kinematic data from the DEIMOS instrument on Keck II. Using 21 fields in the south‐west of the galaxy, we measure the lag of this component with respect to the thin disc, as well as the dispersion, metallicity and scalelength of the component. We find an average lag between the two components of 〈Δv〉= 46.0 ± 3.9 km s−1. The velocity dispersion of the thick disc is σthick= 50.8 ± 1.9 km s−1, greater than the value of dispersion we determine for the thin disc, σthin= 35.7 ± 1.0 km s−1. The thick disc is more metal poor than the thin disc, with [Fe/H]spec=−1.0 ± 0.1 compared with [Fe/H]spec=−0.7 ± 0.05 for the thin disc. We measure a radial scalelength of the thin and thick discs of hr= 7.3 ± 1.0 and 8.0 ± 1.2 kpc, respectively. From this, we infer scaleheights for both discs of 1.1 ± 0.2 and 2.8 ± 0.6 kpc, both of which are approximately two to three times larger than those observed in the Milky Way. We estimate a mass range for the thick‐disc component of 2.4 × 1010 < M*, thick < 4.1 × 1010 M⊙. This value provides a useful constraint on possible formation mechanisms, as any proposed method for forming a thick disc must be able to heat (or deposit) at least this amount of material.</div></front></TEI><affiliations><list><country><li>Australie</li><li>France</li><li>Royaume-Uni</li><li>États-Unis</li></country><region><li>Angleterre</li><li>Angleterre de l'Est</li><li>Californie</li><li>Nouvelle-Galles du Sud</li><li>Écosse</li></region><settlement><li>Cambridge</li><li>Sydney</li><li>Édimbourg</li></settlement><orgName><li>Université d'Édimbourg</li><li>Université de Cambridge</li><li>Université de Sydney</li></orgName></list><tree><noCountry><name sortKey="Koch, A" sort="Koch, A" uniqKey="Koch A" first="A." last="Koch">A. Koch</name><name sortKey="Tanvir, N" sort="Tanvir, N" uniqKey="Tanvir N" first="N." last="Tanvir">N. Tanvir</name></noCountry><country name="Royaume-Uni"><region name="Angleterre"><name sortKey="Collins, M L M" sort="Collins, M L M" uniqKey="Collins M" first="M. L. M." last="Collins">M. L. M. Collins</name></region><name sortKey="Chapman, S C" sort="Chapman, S C" uniqKey="Chapman S" first="S. C." last="Chapman">S. C. Chapman</name><name sortKey="Collins, M L M" sort="Collins, M L M" uniqKey="Collins M" first="M. L. M." last="Collins">M. L. M. Collins</name><name sortKey="Ferguson, A M N" sort="Ferguson, A M N" uniqKey="Ferguson A" first="A. M. N." last="Ferguson">A. M. N. Ferguson</name><name sortKey="Irwin, M J" sort="Irwin, M J" uniqKey="Irwin M" first="M. J." last="Irwin">M. J. Irwin</name></country><country name="France"><noRegion><name sortKey="Ibata, R A" sort="Ibata, R A" uniqKey="Ibata R" first="R. A." last="Ibata">R. A. Ibata</name></noRegion></country><country name="États-Unis"><region name="Californie"><name sortKey="Rich, R M" sort="Rich, R M" uniqKey="Rich R" first="R. M." last="Rich">R. M. Rich</name></region></country><country name="Australie"><region name="Nouvelle-Galles du Sud"><name sortKey="Lewis, G F" sort="Lewis, G F" uniqKey="Lewis G" first="G. F." last="Lewis">G. F. Lewis</name></region></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
EXPLOR_STEP=$WICRI_ROOT/Wicri/Asie/explor/AustralieFrV1/Data/Main/Exploration
HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 006305 | SxmlIndent | more
Ou
HfdSelect -h $EXPLOR_AREA/Data/Main/Exploration/biblio.hfd -nk 006305 | SxmlIndent | more
Pour mettre un lien sur cette page dans le réseau Wicri
{{Explor lien
|wiki= Wicri/Asie
|area= AustralieFrV1
|flux= Main
|étape= Exploration
|type= RBID
|clé= ISTEX:C0D673980181B32B7FEF7F5B4B1D6B1271E999C9
|texte= The kinematic identification of a thick stellar disc in M31
}}
| This area was generated with Dilib version V0.6.33. |  |