A BAYESIAN APPROACH TO LOCATING THE RED GIANT BRANCH TIP MAGNITUDE. II. DISTANCES TO THE SATELLITES OF M31
Identifieur interne : 005F44 ( Main/Exploration ); précédent : 005F43; suivant : 005F45A BAYESIAN APPROACH TO LOCATING THE RED GIANT BRANCH TIP MAGNITUDE. II. DISTANCES TO THE SATELLITES OF M31
Auteurs : A. R. Conn [Australie, France] ; R. A. Ibata [France] ; G. F. Lewis [Australie] ; Q. A. Parker [Australie] ; D. B. Zucker [Australie] ; N. F. Martin [France] ; A. W. Mcconnachie [Canada] ; M. J. Irwin [Royaume-Uni] ; N. Tanvir [Royaume-Uni] ; M. A. Fardal [États-Unis] ; A. M. N. Ferguson [Royaume-Uni] ; S. C. Chapman [Royaume-Uni] ; D. Valls-Gabaud [France]Source :
- The Astrophysical journal [ 0004-637X ] ; 2012.
Descripteurs français
- Pascal (Inist)
English descriptors
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Abstract
In "A Bayesian Approach to Locating the Red Giant Branch Tip Magnitude (Part I)," a new technique was introduced for obtaining distances using the tip of the red giant branch (TRGB) standard candle. Here we describe a useful complement to the technique with the potential to further reduce the uncertainty in our distance measurements by incorporating a matched-filter weighting scheme into the model likelihood calculations. In this scheme, stars are weighted according to their probability of being true object members. We then re-test our modified algorithm using random-realization artificial data to verify the validity of the generated posterior probability distributions (PPDs) and proceed to apply the algorithm to the satellite system of M31, culminating in a three-dimensional view of the system. Further to the distributions thus obtained, we apply a satellite-specific prior on the satellite distances to weight the resulting distance posterior distributions, based on the halo density profile. Thus in a single publication, using a single method, a comprehensive coverage of the distances to the companion galaxies of M31 is presented, encompassing the dwarf spheroidals Andromedas I-III, V, IX-XXVII, and XXX along with NGC 147, NGC 185, M33, and M31 itself. Of these, the distances to Andromedas XXIV-XXVII and Andromeda XXX have never before been derived using the TRGB. Object distances are determined from high-resolution tip magnitude posterior distributions generated using the Markov Chain Monte Carlo technique and associated sampling of these distributions to take into account uncertainties in foreground extinction and the absolute magnitude of the TRGB as well as photometric errors. The distance PPDs obtained for each object both with and without the aforementioned prior are made available to the reader in tabular form. The large object coverage takes advantage of the unprecedented size and photometric depth of the Pan-Andromeda Archaeological Survey. Finally, a preliminary investigation into the satellite density distribution within the halo is made using the obtained distance distributions. For simplicity, this investigation assumes a single power law for the density as a function of radius, with the slope of this power law examined for several subsets of the entire satellite sample.
Affiliations:
- Australie, Canada, France, Royaume-Uni, États-Unis
- Alsace (région administrative), Angleterre, Angleterre de l'Est, Grand Est, Massachusetts, Nouvelle-Galles du Sud, Écosse, Île-de-France
- Amherst (Massachusetts), Cambridge, Paris, Strasbourg, Sydney, Édimbourg
- Université d'Édimbourg, Université de Cambridge, Université de Strasbourg, Université de Sydney, Université du Massachusetts
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B." last="Zucker">D. B. Zucker</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Department of Physics & Astronomy, Macquarie University</s1><s2>NSW 2109</s2><s3>AUS</s3><sZ>1 aut.</sZ><sZ>4 aut.</sZ><sZ>5 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>NSW 2109</wicri:noRegion></affiliation><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Research Centre in Astronomy, Astrophysics, and Astrophotonics (MQAASTRO), Macquarie University</s1><s2>NSW 2109</s2><s3>AUS</s3><sZ>1 aut.</sZ><sZ>4 aut.</sZ><sZ>5 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>NSW 2109</wicri:noRegion></affiliation><affiliation wicri:level="1"><inist:fA14 i1="05"><s1>Australian Astronomical Observatory, P.O. Box 296</s1><s2>Epping, NSW 2121</s2><s3>AUS</s3><sZ>4 aut.</sZ><sZ>5 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>Epping, NSW 2121</wicri:noRegion></affiliation></author><author><name sortKey="Martin, N F" sort="Martin, N F" uniqKey="Martin N" first="N. F." last="Martin">N. F. Martin</name><affiliation wicri:level="4"><inist:fA14 i1="03"><s1>Observatoire Astronomique, Universite de Strasbourg, CNRS</s1><s2>67000 Strasbourg</s2><s3>FRA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>6 aut.</sZ></inist:fA14><country>France</country><wicri:noRegion>67000 Strasbourg</wicri:noRegion><placeName><settlement type="city">Strasbourg</settlement><region type="region" nuts="2">Grand Est</region><region type="old region" nuts="2">Alsace (région administrative)</region><settlement type="city">Strasbourg</settlement></placeName><orgName type="university">Université de Strasbourg</orgName></affiliation></author><author><name sortKey="Mcconnachie, A W" sort="Mcconnachie, A W" uniqKey="Mcconnachie A" first="A. W." last="Mcconnachie">A. W. Mcconnachie</name><affiliation wicri:level="1"><inist:fA14 i1="06"><s1>NRC Herzberg Institute of Astrophysics, 5071 West Saanich Road, Victoria</s1><s2>British Columbia V9E 2E7</s2><s3>CAN</s3><sZ>7 aut.</sZ></inist:fA14><country>Canada</country><wicri:noRegion>British Columbia V9E 2E7</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"><inist:fA14 i1="07"><s1>Institute of Astronomy, University of Cambridge, Madingley Road</s1><s2>Cambridge CB3 0HA</s2><s3>GBR</s3><sZ>8 aut.</sZ><sZ>12 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="Tanvir, N" sort="Tanvir, N" uniqKey="Tanvir N" first="N." last="Tanvir">N. Tanvir</name><affiliation wicri:level="1"><inist:fA14 i1="08"><s1>Department of Physics and Astronomy, University of Leicester</s1><s2>Leicester LE1 7RH</s2><s3>GBR</s3><sZ>9 aut.</sZ></inist:fA14><country>Royaume-Uni</country><wicri:noRegion>Leicester LE1 7RH</wicri:noRegion></affiliation></author><author><name sortKey="Fardal, M A" sort="Fardal, M A" uniqKey="Fardal M" first="M. A." last="Fardal">M. A. Fardal</name><affiliation wicri:level="4"><inist:fA14 i1="09"><s1>University of Massachusetts, Department of Astronomy, LGRT 619-E, 710 N. Pleasant Street</s1><s2>Amherst, MA 01003-9305</s2><s3>USA</s3><sZ>10 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Amherst, MA 01003-9305</wicri:noRegion><orgName type="university">Université du Massachusetts</orgName><placeName><settlement type="city">Amherst (Massachusetts)</settlement><region type="state">Massachusetts</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"><inist:fA14 i1="10"><s1>Institute for Astronomy, University of Edinburgh, Royal Observatory, Blackford Hill</s1><s2>Edinburgh EH9 3HJ</s2><s3>GBR</s3><sZ>11 aut.</sZ></inist:fA14><country>Royaume-Uni</country><wicri:noRegion>Edinburgh EH9 3HJ</wicri:noRegion><orgName type="university">Université d'Édimbourg</orgName><placeName><settlement type="city">Édimbourg</settlement><region type="country">Écosse</region></placeName></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"><inist:fA14 i1="07"><s1>Institute of Astronomy, University of Cambridge, Madingley Road</s1><s2>Cambridge CB3 0HA</s2><s3>GBR</s3><sZ>8 aut.</sZ><sZ>12 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="Valls Gabaud, D" sort="Valls Gabaud, D" uniqKey="Valls Gabaud D" first="D." last="Valls-Gabaud">D. Valls-Gabaud</name><affiliation wicri:level="1"><inist:fA14 i1="11"><s1>Observatoire de Paris, LERMA, 61 Avenue de l'Observatoire</s1><s2>75014 Paris</s2><s3>FRA</s3><sZ>13 aut.</sZ></inist:fA14><country>France</country><wicri:noRegion>75014 Paris</wicri:noRegion><placeName><settlement type="city">Paris</settlement><region type="région" nuts="2">Île-de-France</region></placeName></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">INIST</idno><idno type="inist">12-0410359</idno><date when="2012">2012</date><idno type="stanalyst">PASCAL 12-0410359 INIST</idno><idno type="RBID">Pascal:12-0410359</idno><idno type="wicri:Area/PascalFrancis/Corpus">000F28</idno><idno type="wicri:Area/PascalFrancis/Curation">004F93</idno><idno type="wicri:Area/PascalFrancis/Checkpoint">001441</idno><idno type="wicri:explorRef" wicri:stream="PascalFrancis" wicri:step="Checkpoint">001441</idno><idno type="wicri:doubleKey">0004-637X:2012:Conn A:a:bayesian:approach</idno><idno type="wicri:Area/Main/Merge">006276</idno><idno type="wicri:Area/Main/Curation">005F44</idno><idno type="wicri:Area/Main/Exploration">005F44</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">A BAYESIAN APPROACH TO LOCATING THE RED GIANT BRANCH TIP MAGNITUDE. II. DISTANCES TO THE SATELLITES OF M31</title><author><name sortKey="Conn, A R" sort="Conn, A R" uniqKey="Conn A" first="A. R." last="Conn">A. R. Conn</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Department of Physics & Astronomy, Macquarie University</s1><s2>NSW 2109</s2><s3>AUS</s3><sZ>1 aut.</sZ><sZ>4 aut.</sZ><sZ>5 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>NSW 2109</wicri:noRegion></affiliation><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Research Centre in Astronomy, Astrophysics, and Astrophotonics (MQAASTRO), Macquarie University</s1><s2>NSW 2109</s2><s3>AUS</s3><sZ>1 aut.</sZ><sZ>4 aut.</sZ><sZ>5 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>NSW 2109</wicri:noRegion></affiliation><affiliation wicri:level="4"><inist:fA14 i1="03"><s1>Observatoire Astronomique, Universite de Strasbourg, CNRS</s1><s2>67000 Strasbourg</s2><s3>FRA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>6 aut.</sZ></inist:fA14><country>France</country><wicri:noRegion>67000 Strasbourg</wicri:noRegion><placeName><settlement type="city">Strasbourg</settlement><region type="region" nuts="2">Grand Est</region><region type="old region" nuts="2">Alsace (région administrative)</region><settlement type="city">Strasbourg</settlement></placeName><orgName type="university">Université de Strasbourg</orgName></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="4"><inist:fA14 i1="03"><s1>Observatoire Astronomique, Universite de Strasbourg, CNRS</s1><s2>67000 Strasbourg</s2><s3>FRA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>6 aut.</sZ></inist:fA14><country>France</country><wicri:noRegion>67000 Strasbourg</wicri:noRegion><placeName><settlement type="city">Strasbourg</settlement><region type="region" nuts="2">Grand Est</region><region type="old region" nuts="2">Alsace (région administrative)</region><settlement type="city">Strasbourg</settlement></placeName><orgName type="university">Université de Strasbourg</orgName></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"><inist:fA14 i1="04"><s1>Sydney Institute for Astronomy, School of Physics, A28, University of Sydney</s1><s2>Sydney, 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="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="01"><s1>Department of Physics & Astronomy, Macquarie University</s1><s2>NSW 2109</s2><s3>AUS</s3><sZ>1 aut.</sZ><sZ>4 aut.</sZ><sZ>5 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>NSW 2109</wicri:noRegion></affiliation><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Research Centre in Astronomy, Astrophysics, and Astrophotonics (MQAASTRO), Macquarie University</s1><s2>NSW 2109</s2><s3>AUS</s3><sZ>1 aut.</sZ><sZ>4 aut.</sZ><sZ>5 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>NSW 2109</wicri:noRegion></affiliation><affiliation wicri:level="1"><inist:fA14 i1="05"><s1>Australian Astronomical Observatory, P.O. Box 296</s1><s2>Epping, NSW 2121</s2><s3>AUS</s3><sZ>4 aut.</sZ><sZ>5 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>Epping, NSW 2121</wicri:noRegion></affiliation></author><author><name sortKey="Zucker, D B" sort="Zucker, D B" uniqKey="Zucker D" first="D. B." last="Zucker">D. B. Zucker</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Department of Physics & Astronomy, Macquarie University</s1><s2>NSW 2109</s2><s3>AUS</s3><sZ>1 aut.</sZ><sZ>4 aut.</sZ><sZ>5 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>NSW 2109</wicri:noRegion></affiliation><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Research Centre in Astronomy, Astrophysics, and Astrophotonics (MQAASTRO), Macquarie University</s1><s2>NSW 2109</s2><s3>AUS</s3><sZ>1 aut.</sZ><sZ>4 aut.</sZ><sZ>5 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>NSW 2109</wicri:noRegion></affiliation><affiliation wicri:level="1"><inist:fA14 i1="05"><s1>Australian Astronomical Observatory, P.O. Box 296</s1><s2>Epping, NSW 2121</s2><s3>AUS</s3><sZ>4 aut.</sZ><sZ>5 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>Epping, NSW 2121</wicri:noRegion></affiliation></author><author><name sortKey="Martin, N F" sort="Martin, N F" uniqKey="Martin N" first="N. F." last="Martin">N. F. Martin</name><affiliation wicri:level="4"><inist:fA14 i1="03"><s1>Observatoire Astronomique, Universite de Strasbourg, CNRS</s1><s2>67000 Strasbourg</s2><s3>FRA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>6 aut.</sZ></inist:fA14><country>France</country><wicri:noRegion>67000 Strasbourg</wicri:noRegion><placeName><settlement type="city">Strasbourg</settlement><region type="region" nuts="2">Grand Est</region><region type="old region" nuts="2">Alsace (région administrative)</region><settlement type="city">Strasbourg</settlement></placeName><orgName type="university">Université de Strasbourg</orgName></affiliation></author><author><name sortKey="Mcconnachie, A W" sort="Mcconnachie, A W" uniqKey="Mcconnachie A" first="A. W." last="Mcconnachie">A. W. Mcconnachie</name><affiliation wicri:level="1"><inist:fA14 i1="06"><s1>NRC Herzberg Institute of Astrophysics, 5071 West Saanich Road, Victoria</s1><s2>British Columbia V9E 2E7</s2><s3>CAN</s3><sZ>7 aut.</sZ></inist:fA14><country>Canada</country><wicri:noRegion>British Columbia V9E 2E7</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"><inist:fA14 i1="07"><s1>Institute of Astronomy, University of Cambridge, Madingley Road</s1><s2>Cambridge CB3 0HA</s2><s3>GBR</s3><sZ>8 aut.</sZ><sZ>12 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="Tanvir, N" sort="Tanvir, N" uniqKey="Tanvir N" first="N." last="Tanvir">N. Tanvir</name><affiliation wicri:level="1"><inist:fA14 i1="08"><s1>Department of Physics and Astronomy, University of Leicester</s1><s2>Leicester LE1 7RH</s2><s3>GBR</s3><sZ>9 aut.</sZ></inist:fA14><country>Royaume-Uni</country><wicri:noRegion>Leicester LE1 7RH</wicri:noRegion></affiliation></author><author><name sortKey="Fardal, M A" sort="Fardal, M A" uniqKey="Fardal M" first="M. A." last="Fardal">M. A. Fardal</name><affiliation wicri:level="4"><inist:fA14 i1="09"><s1>University of Massachusetts, Department of Astronomy, LGRT 619-E, 710 N. Pleasant Street</s1><s2>Amherst, MA 01003-9305</s2><s3>USA</s3><sZ>10 aut.</sZ></inist:fA14><country>États-Unis</country><wicri:noRegion>Amherst, MA 01003-9305</wicri:noRegion><orgName type="university">Université du Massachusetts</orgName><placeName><settlement type="city">Amherst (Massachusetts)</settlement><region type="state">Massachusetts</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"><inist:fA14 i1="10"><s1>Institute for Astronomy, University of Edinburgh, Royal Observatory, Blackford Hill</s1><s2>Edinburgh EH9 3HJ</s2><s3>GBR</s3><sZ>11 aut.</sZ></inist:fA14><country>Royaume-Uni</country><wicri:noRegion>Edinburgh EH9 3HJ</wicri:noRegion><orgName type="university">Université d'Édimbourg</orgName><placeName><settlement type="city">Édimbourg</settlement><region type="country">Écosse</region></placeName></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"><inist:fA14 i1="07"><s1>Institute of Astronomy, University of Cambridge, Madingley Road</s1><s2>Cambridge CB3 0HA</s2><s3>GBR</s3><sZ>8 aut.</sZ><sZ>12 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="Valls Gabaud, D" sort="Valls Gabaud, D" uniqKey="Valls Gabaud D" first="D." last="Valls-Gabaud">D. Valls-Gabaud</name><affiliation wicri:level="1"><inist:fA14 i1="11"><s1>Observatoire de Paris, LERMA, 61 Avenue de l'Observatoire</s1><s2>75014 Paris</s2><s3>FRA</s3><sZ>13 aut.</sZ></inist:fA14><country>France</country><wicri:noRegion>75014 Paris</wicri:noRegion><placeName><settlement type="city">Paris</settlement><region type="région" nuts="2">Île-de-France</region></placeName></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="2012">2012</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>Absolute magnitude</term><term>Algorithms</term><term>Density distribution</term><term>Distance measurement</term><term>Galaxies</term><term>Local group</term><term>Markov chain</term><term>Matched filters</term><term>Models</term><term>Monte Carlo methods</term><term>Pan</term><term>Power law</term><term>Probability</term><term>Probability distribution</term><term>Red giant stars</term><term>Saturn satellite</term><term>Stellar content</term><term>Uncertainty</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Géante rouge</term><term>Incertitude</term><term>Mesure de distance</term><term>Mesure distance</term><term>Filtre adapté</term><term>Modèle</term><term>Probabilité</term><term>Algorithme</term><term>Loi probabilité</term><term>Galaxies</term><term>Chaîne Markov</term><term>Méthode Monte Carlo</term><term>Magnitude absolue</term><term>Pan</term><term>Distribution densité</term><term>Loi puissance</term><term>Contenu stellaire</term><term>Groupe local</term><term>Satellite Saturne</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">In "A Bayesian Approach to Locating the Red Giant Branch Tip Magnitude (Part I)," a new technique was introduced for obtaining distances using the tip of the red giant branch (TRGB) standard candle. Here we describe a useful complement to the technique with the potential to further reduce the uncertainty in our distance measurements by incorporating a matched-filter weighting scheme into the model likelihood calculations. In this scheme, stars are weighted according to their probability of being true object members. We then re-test our modified algorithm using random-realization artificial data to verify the validity of the generated posterior probability distributions (PPDs) and proceed to apply the algorithm to the satellite system of M31, culminating in a three-dimensional view of the system. Further to the distributions thus obtained, we apply a satellite-specific prior on the satellite distances to weight the resulting distance posterior distributions, based on the halo density profile. Thus in a single publication, using a single method, a comprehensive coverage of the distances to the companion galaxies of M31 is presented, encompassing the dwarf spheroidals Andromedas I-III, V, IX-XXVII, and XXX along with NGC 147, NGC 185, M33, and M31 itself. Of these, the distances to Andromedas XXIV-XXVII and Andromeda XXX have never before been derived using the TRGB. Object distances are determined from high-resolution tip magnitude posterior distributions generated using the Markov Chain Monte Carlo technique and associated sampling of these distributions to take into account uncertainties in foreground extinction and the absolute magnitude of the TRGB as well as photometric errors. The distance PPDs obtained for each object both with and without the aforementioned prior are made available to the reader in tabular form. The large object coverage takes advantage of the unprecedented size and photometric depth of the Pan-Andromeda Archaeological Survey. Finally, a preliminary investigation into the satellite density distribution within the halo is made using the obtained distance distributions. For simplicity, this investigation assumes a single power law for the density as a function of radius, with the slope of this power law examined for several subsets of the entire satellite sample.</div></front></TEI><affiliations><list><country><li>Australie</li><li>Canada</li><li>France</li><li>Royaume-Uni</li><li>États-Unis</li></country><region><li>Alsace (région administrative)</li><li>Angleterre</li><li>Angleterre de l'Est</li><li>Grand Est</li><li>Massachusetts</li><li>Nouvelle-Galles du Sud</li><li>Écosse</li><li>Île-de-France</li></region><settlement><li>Amherst (Massachusetts)</li><li>Cambridge</li><li>Paris</li><li>Strasbourg</li><li>Sydney</li><li>Édimbourg</li></settlement><orgName><li>Université d'Édimbourg</li><li>Université de Cambridge</li><li>Université de Strasbourg</li><li>Université de Sydney</li><li>Université du Massachusetts</li></orgName></list><tree><country name="Australie"><noRegion><name sortKey="Conn, A R" sort="Conn, A R" uniqKey="Conn A" first="A. R." last="Conn">A. R. Conn</name></noRegion><name sortKey="Conn, A R" sort="Conn, A R" uniqKey="Conn A" first="A. R." last="Conn">A. R. Conn</name><name sortKey="Lewis, G F" sort="Lewis, G F" uniqKey="Lewis G" first="G. F." last="Lewis">G. F. Lewis</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="Parker, Q A" sort="Parker, Q A" uniqKey="Parker Q" first="Q. A." last="Parker">Q. A. Parker</name><name sortKey="Zucker, D B" sort="Zucker, D B" uniqKey="Zucker D" first="D. B." last="Zucker">D. B. Zucker</name><name sortKey="Zucker, D B" sort="Zucker, D B" uniqKey="Zucker D" first="D. B." last="Zucker">D. B. Zucker</name><name sortKey="Zucker, D B" sort="Zucker, D B" uniqKey="Zucker D" first="D. B." last="Zucker">D. B. Zucker</name></country><country name="France"><region name="Grand Est"><name sortKey="Conn, A R" sort="Conn, A R" uniqKey="Conn A" first="A. R." last="Conn">A. R. Conn</name></region><name sortKey="Ibata, R A" sort="Ibata, R A" uniqKey="Ibata R" first="R. A." last="Ibata">R. A. Ibata</name><name sortKey="Martin, N F" sort="Martin, N F" uniqKey="Martin N" first="N. F." last="Martin">N. F. Martin</name><name sortKey="Valls Gabaud, D" sort="Valls Gabaud, D" uniqKey="Valls Gabaud D" first="D." last="Valls-Gabaud">D. Valls-Gabaud</name></country><country name="Canada"><noRegion><name sortKey="Mcconnachie, A W" sort="Mcconnachie, A W" uniqKey="Mcconnachie A" first="A. W." last="Mcconnachie">A. W. Mcconnachie</name></noRegion></country><country name="Royaume-Uni"><region name="Angleterre"><name sortKey="Irwin, M J" sort="Irwin, M J" uniqKey="Irwin M" first="M. J." last="Irwin">M. J. Irwin</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="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="Tanvir, N" sort="Tanvir, N" uniqKey="Tanvir N" first="N." last="Tanvir">N. Tanvir</name></country><country name="États-Unis"><region name="Massachusetts"><name sortKey="Fardal, M A" sort="Fardal, M A" uniqKey="Fardal M" first="M. A." last="Fardal">M. A. Fardal</name></region></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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