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Article: New structure in the Shapley supercluster

TitleNew structure in the Shapley supercluster
Authors
KeywordsLarge-scale structure of universe
Galaxies: clusters, distances and redshifts
Issue Date1999
Citation
Publications of the Astronomical Society of Australia, 1999, v. 16, n. 2, p. 113-123 How to Cite?
AbstractWe present new radial velocities for 306 bright (R < 16) galaxies in a 77 deg2 region of the Shapley supercluster, measured with the FLAIR-11 spectrograph on the UK Schmidt Telescope. The galaxies we measured were uniformly distributed over the survey area, in contrast to previous samples which were concentrated in several rich Abell clusters. Most of the galaxies (230) were members of the Shapley supercluster: they trace out two previously unknown sheets of galaxies linking the Abell clusters of the supercluster. In a 44 deg2 area of the supercluster excluding the Abell clusters, these sheets alone represent an overdensity of a factor of 2·0 ± 0·2 compared to a uniform galaxy distribution. The supercluster is not flattened in the Declination direction as has been suggested in previous papers. Within our survey area the new galaxies contribute an additional 50% to the known contents of the Shapley supercluster, with a corresponding increase in its contribution to the motion of the Local Group.
Persistent Identifierhttp://hdl.handle.net/10722/208814
ISSN
2015 Impact Factor: 3.245

 

DC FieldValueLanguage
dc.contributor.authorDrinkwater, Michael J.-
dc.contributor.authorProust, Dominique-
dc.contributor.authorParker, Quentin A.-
dc.contributor.authorQuintana, Hernán-
dc.contributor.authorSlezak, Éric-
dc.date.accessioned2015-03-23T02:01:47Z-
dc.date.available2015-03-23T02:01:47Z-
dc.date.issued1999-
dc.identifier.citationPublications of the Astronomical Society of Australia, 1999, v. 16, n. 2, p. 113-123-
dc.identifier.issn1323-3580-
dc.identifier.urihttp://hdl.handle.net/10722/208814-
dc.description.abstractWe present new radial velocities for 306 bright (R < 16) galaxies in a 77 deg2 region of the Shapley supercluster, measured with the FLAIR-11 spectrograph on the UK Schmidt Telescope. The galaxies we measured were uniformly distributed over the survey area, in contrast to previous samples which were concentrated in several rich Abell clusters. Most of the galaxies (230) were members of the Shapley supercluster: they trace out two previously unknown sheets of galaxies linking the Abell clusters of the supercluster. In a 44 deg2 area of the supercluster excluding the Abell clusters, these sheets alone represent an overdensity of a factor of 2·0 ± 0·2 compared to a uniform galaxy distribution. The supercluster is not flattened in the Declination direction as has been suggested in previous papers. Within our survey area the new galaxies contribute an additional 50% to the known contents of the Shapley supercluster, with a corresponding increase in its contribution to the motion of the Local Group.-
dc.languageeng-
dc.relation.ispartofPublications of the Astronomical Society of Australia-
dc.subjectLarge-scale structure of universe-
dc.subjectGalaxies: clusters, distances and redshifts-
dc.titleNew structure in the Shapley supercluster-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.scopuseid_2-s2.0-0033418282-
dc.identifier.volume16-
dc.identifier.issue2-
dc.identifier.spage113-
dc.identifier.epage123-

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