Velocity anti-correlation of diametrically opposed galaxy satellites in the low-redshift Universe.
Identifieur interne : 003069 ( PubMed/Checkpoint ); précédent : 003068; suivant : 003070Velocity anti-correlation of diametrically opposed galaxy satellites in the low-redshift Universe.
Auteurs : Neil G. Ibata [France] ; Rodrigo A. Ibata [France] ; Benoit Famaey [France] ; Geraint F. Lewis [Australie]Source :
- Nature [ 1476-4687 ] ; 2014.
Abstract
Recent work has shown that the Milky Way and the Andromeda galaxies both possess the unexpected property that their dwarf satellite galaxies are aligned in thin and kinematically coherent planar structures. It is interesting to evaluate the incidence of such planar structures in the larger galactic population, because the Local Group may not be a representative environment. Here we report measurements of the velocities of pairs of diametrically opposed satellite galaxies. In the local Universe (redshift z < 0.05), we find that satellite pairs out to a distance of 150 kiloparsecs from the galactic centre are preferentially anti-correlated in their velocities (99.994 per cent confidence level), and that the distribution of galaxies in the larger-scale environment (out to distances of about 2 megaparsecs) is strongly clumped along the axis joining the inner satellite pair (>7σ confidence). This may indicate that planes of co-rotating satellites, similar to those seen around the Andromeda galaxy, are ubiquitous, and their coherent motion suggests that they represent a substantial repository of angular momentum on scales of about 100 kiloparsecs.
DOI: 10.1038/nature13481
PubMed: 25043008
Affiliations:
- Australie, France
- Alsace (région administrative), Grand Est, Nouvelle-Galles du Sud
- Strasbourg, Sydney
- Université de Strasbourg, Université de Sydney
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It is interesting to evaluate the incidence of such planar structures in the larger galactic population, because the Local Group may not be a representative environment. Here we report measurements of the velocities of pairs of diametrically opposed satellite galaxies. In the local Universe (redshift z < 0.05), we find that satellite pairs out to a distance of 150 kiloparsecs from the galactic centre are preferentially anti-correlated in their velocities (99.994 per cent confidence level), and that the distribution of galaxies in the larger-scale environment (out to distances of about 2 megaparsecs) is strongly clumped along the axis joining the inner satellite pair (>7σ confidence). This may indicate that planes of co-rotating satellites, similar to those seen around the Andromeda galaxy, are ubiquitous, and their coherent motion suggests that they represent a substantial repository of angular momentum on scales of about 100 kiloparsecs.</div></front></TEI><pubmed><MedlineCitation Status="PubMed-not-MEDLINE" Owner="NLM"><PMID Version="1">25043008</PMID><DateCreated><Year>2014</Year><Month>08</Month><Day>01</Day></DateCreated><DateCompleted><Year>2014</Year><Month>09</Month><Day>16</Day></DateCompleted><DateRevised><Year>2017</Year><Month>02</Month><Day>20</Day></DateRevised><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Electronic">1476-4687</ISSN><JournalIssue CitedMedium="Internet"><Volume>511</Volume><Issue>7511</Issue><PubDate><Year>2014</Year><Month>Jul</Month><Day>31</Day></PubDate></JournalIssue><Title>Nature</Title><ISOAbbreviation>Nature</ISOAbbreviation></Journal><ArticleTitle>Velocity anti-correlation of diametrically opposed galaxy satellites in the low-redshift Universe.</ArticleTitle><Pagination><MedlinePgn>563-6</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1038/nature13481</ELocationID><Abstract><AbstractText>Recent work has shown that the Milky Way and the Andromeda galaxies both possess the unexpected property that their dwarf satellite galaxies are aligned in thin and kinematically coherent planar structures. It is interesting to evaluate the incidence of such planar structures in the larger galactic population, because the Local Group may not be a representative environment. Here we report measurements of the velocities of pairs of diametrically opposed satellite galaxies. In the local Universe (redshift z < 0.05), we find that satellite pairs out to a distance of 150 kiloparsecs from the galactic centre are preferentially anti-correlated in their velocities (99.994 per cent confidence level), and that the distribution of galaxies in the larger-scale environment (out to distances of about 2 megaparsecs) is strongly clumped along the axis joining the inner satellite pair (>7σ confidence). This may indicate that planes of co-rotating satellites, similar to those seen around the Andromeda galaxy, are ubiquitous, and their coherent motion suggests that they represent a substantial repository of angular momentum on scales of about 100 kiloparsecs.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Ibata</LastName><ForeName>Neil G</ForeName><Initials>NG</Initials><AffiliationInfo><Affiliation>Lycée international des Pontonniers, 1 rue des Pontonniers, F-67000 Strasbourg, France.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Ibata</LastName><ForeName>Rodrigo A</ForeName><Initials>RA</Initials><AffiliationInfo><Affiliation>Observatoire astronomique de Strasbourg, Université de Strasbourg, CNRS, UMR 7550, 11 rue de l'Université, F-67000 Strasbourg, France.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Famaey</LastName><ForeName>Benoit</ForeName><Initials>B</Initials><AffiliationInfo><Affiliation>Observatoire astronomique de Strasbourg, Université de Strasbourg, CNRS, UMR 7550, 11 rue de l'Université, F-67000 Strasbourg, France.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Lewis</LastName><ForeName>Geraint F</ForeName><Initials>GF</Initials><AffiliationInfo><Affiliation>Sydney Institute for Astronomy, School of Physics, A28, The University of Sydney, New South Wales 2006, Australia.</Affiliation></AffiliationInfo></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType><PublicationType UI="D013485">Research Support, Non-U.S. Gov't</PublicationType></PublicationTypeList><ArticleDate DateType="Electronic"><Year>2014</Year><Month>07</Month><Day>20</Day></ArticleDate></Article><MedlineJournalInfo><Country>England</Country><MedlineTA>Nature</MedlineTA><NlmUniqueID>0410462</NlmUniqueID><ISSNLinking>0028-0836</ISSNLinking></MedlineJournalInfo><CommentsCorrectionsList><CommentsCorrections RefType="Cites"><RefSource>Nature. 2009 Sep 3;461(7260):66-9</RefSource><PMID Version="1">19727194</PMID></CommentsCorrections><CommentsCorrections RefType="Cites"><RefSource>Nature. 2013 Jan 3;493(7430):62-5</RefSource><PMID Version="1">23282362</PMID></CommentsCorrections></CommentsCorrectionsList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="received"><Year>2014</Year><Month>03</Month><Day>15</Day></PubMedPubDate><PubMedPubDate PubStatus="accepted"><Year>2014</Year><Month>05</Month><Day>08</Day></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>2014</Year><Month>7</Month><Day>22</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2014</Year><Month>7</Month><Day>22</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2014</Year><Month>7</Month><Day>22</Day><Hour>6</Hour><Minute>1</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">25043008</ArticleId><ArticleId IdType="pii">nature13481</ArticleId><ArticleId IdType="doi">10.1038/nature13481</ArticleId></ArticleIdList></PubmedData></pubmed><affiliations><list><country><li>Australie</li><li>France</li></country><region><li>Alsace (région administrative)</li><li>Grand Est</li><li>Nouvelle-Galles du Sud</li></region><settlement><li>Strasbourg</li><li>Sydney</li></settlement><orgName><li>Université de Strasbourg</li><li>Université de Sydney</li></orgName></list><tree><country name="France"><region name="Grand Est"><name sortKey="Ibata, Neil G" sort="Ibata, Neil G" uniqKey="Ibata N" first="Neil G" last="Ibata">Neil G. Ibata</name></region><name sortKey="Famaey, Benoit" sort="Famaey, Benoit" uniqKey="Famaey B" first="Benoit" last="Famaey">Benoit Famaey</name><name sortKey="Ibata, Rodrigo A" sort="Ibata, Rodrigo A" uniqKey="Ibata R" first="Rodrigo A" last="Ibata">Rodrigo A. Ibata</name></country><country name="Australie"><region name="Nouvelle-Galles du Sud"><name sortKey="Lewis, Geraint F" sort="Lewis, Geraint F" uniqKey="Lewis G" first="Geraint F" last="Lewis">Geraint F. Lewis</name></region></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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