Antlia Cluster

Galaxy cluster
name = Antlia Cluster


epoch=
ra = RA|10|27|60
dec = DEC|-35|15|00
constellation = Antlia
member_no = 254
brightest_member = NGC 3268, NGC 3258
other_names = Abell S636

The Antlia Cluster (or Abell S636) is a cluster of galaxies located in the Hydra-Centaurus Supercluster. The Antlia Cluster is the third nearest to our Local Group after the Virgo Cluster and Fornax Cluster.citation
url = http://adsabs.harvard.edu/abs/2008MNRAS.386.2311S
title = Galaxy populations in the Antlia cluster - I. Photometric properties of early-type galaxies
year = 2008
date = June 2008
authors = Smith Castelli, Analía V.; Bassino, Lilia P.; Richtler, Tom; Cellone, Sergio A.; Aruta, Cristian; Infante, Leopoldo
journal = Monthly Notices of the Royal Astronomical Society
volume = 386
issue = 4
pages = 2311–2322
doi = 10.1111/j.1365-2966.2008.13211.x] The cluster's distance from earth is 32.58 - 32.71 Mly away and can be viewed from earth in the Constellation Antlia. [Castelli, Bassino, Cellone, Richtler, Dirsch, Infante, Auruta, and Gomez, p.1; Dirsch, Richtler, and Bassino p.1] The Antlia Cluster should not be confused with the Antlia Dwarf Galaxy. Dirsch, Richtler, and Bassino pp.1-12]

The cluster is classified, as a rare "Bautz-morgan type III" cluster [Hopp and Materne, p.93; Nakazawa, Makishima, Fukazawa, and Tamura, p.1] , meaning the cluster has no dominating Giant diffuse galaxy (cD). [Guthrie, p.15] Although, this cluster is dominated by two massive elliptical galaxies, NGC 3268 and NGC 3258, the cluster has about 234 galaxies in total. [Dirsch, Richtler, and Bassino p.1; Nakazawa; Makishima; Fukazawa; and Tamura, p.624 ] The cluster is very dense compared to other clusters such as Virgo and Fornax, thus containing early-type galaxies and a larger portion of dwarf ellipticals. [Castelli, Bassino, Cellone, Richtler, Dirsch, Infante, Auruta, and Gomez p.1; Dirsch, Richtler, and Bassino p.1] The Cluster is split into two groups, "The Northern subgroup" gravitating around NGC 3268, and "the Southern subgroup" centered around NGC 3258.

The cluster has an overall redshift of z = 0.0087, implying the cluster like most objects in the universe are expanding away from our Local group and others. Using the now obsolete scientific satellite ASCA , X-ray observations show the cluster is almost isothermal, with a mean temperature of kT ~ 2.0 keV. Nakazawa, Makishima, Fukazawa, and Tamura, p.623-630]

Antila Galaxies: NGC 3267, NGC 3568, NGC 3258, NGC 3269, NGC 3271

Notes

References

*Burnham Jr., Robert (1978) "Burham's Celestial Handbook" Revised Edition Vol. 1 of 3. Dover Publications. New York ISBN 0-486-240630
*Castelli, Bassino, Cellone, Richtler, Dirsch, Infante, Auruta, and Gomez (2006) [http://arxiv.org/pdf/astro-ph/0603391 "Dwarf galaxies in the Antlia Cluster: First results"] . ArXiv.org.
*Dirsch, Richtler, and Bassino (2003) [http://arxiv.org/pdf/astro-ph/0307200 "The Globular Cluster Systems of NGC 3258 and NGC 3268 in the Antlia Cluster"] . ArXiv.org. Astronomy & Astrophysics manuscript no. h4465
*Guthrie, B. N. G. (1974) [http://adsabs.harvard.edu/full/1974MNRAS.168...15G "Radio emission associated with the brightest galaxies in clusters"] . Monthly Notices of the Royal Astronomical Society, Vol. 168, p. 15-20
*Hopp, U. and Materne, J. (1985) [http://adsabs.harvard.edu/abs/1985A&AS...61...93H "The Antlia Cluster of Galaxies and its Environment: The Hydra I-Centarus Supercluster"] . Astronomy and Astrophysics Supplement Series vol. 61, July 1985, p. 93-106
*Nakazawa, K.; Makishima, K.; Fukazawa, Y.; and Tamura, T. (2000) [http://adsabs.harvard.edu/abs/2000PASJ...52..623N "ASCA Observations of a Near-by Cluster in Antlia " ] . Publications of the Astronomical Society of Japan, Vol.52

External links

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