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Coordinates: Sky map 10h 30m 03.5s, −35° 19′ 24″
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}}</ref> However, the cluster is dominated by two massive [[Elliptical galaxy|elliptical galaxies]], [[NGC 3268]] and [[NGC 3258]], and contains a total of about 234 galaxies.<ref name="Nakazawa2000" /><ref name="Dirsch2003" /> 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.<ref name="Dirsch2003" /><ref name="SmithCastelli2005" />{{clarification needed|date=May 2015}} The Cluster is split into two [[galaxy group]]s, ''The Northern subgroup'' gravitating around NGC 3268, and ''the Southern subgroup'' centered on NGC 3258.<ref name="Dirsch2003" />
}}</ref> However, the cluster is dominated by two massive [[Elliptical galaxy|elliptical galaxies]], [[NGC 3268]] and [[NGC 3258]], and contains a total of about 234 galaxies.<ref name="Nakazawa2000" /><ref name="Dirsch2003" /> 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.<ref name="Dirsch2003" /><ref name="SmithCastelli2005" />{{clarification needed|date=May 2015}} The Cluster is split into two [[galaxy group]]s, ''The Northern subgroup'' gravitating around NGC 3268, and ''the Southern subgroup'' centered on NGC 3258.<ref name="Dirsch2003" />


The cluster has an overall [[redshift]] of z = 0.0087, implying that the cluster is, like most objects in the universe, receding from the [[Local Group]].<ref name="Nakazawa2000" /> Using the now-obsolete scientific satellite [[Advanced Satellite for Cosmology and Astrophysics|ASCA]], [[X-ray]] observations show that the cluster is almost [[isothermal]], with a mean temperature of kT ~ 2.0 keV.<ref name="Nakazawa2000" />
The cluster has an overall [[redshift]] of z = 0.0087, implying that the cluster is, like most objects in the Universe, receding from the [[Local Group]].<ref name="Nakazawa2000" /> Using the now-obsolete scientific satellite [[Advanced Satellite for Cosmology and Astrophysics|ASCA]], [[X-ray]] observations show that the cluster is almost [[isothermal]], with a mean temperature of kT ~ 2.0 keV.<ref name="Nakazawa2000" />


==List of named objects in the Antlia Cluster==
==List of named objects in the Antlia Cluster==

Revision as of 23:54, 3 January 2016

Antlia Cluster
Observation data (Epoch J2000)
Constellation(s)Antlia
Right ascension10h 30m 03.5s [1]
Declination−35° 19′ 24″ [1]
Brightest memberNGC 3268, NGC 3258
Number of galaxies254
Richness class0[2]
Bautz–Morgan classificationI-II[2]
Velocity dispersion444-591 km/s[3]
Redshift0.0087[4]
Distance40.7 Mpc (132.7 Mly)[5]
ICM temperature~2.0 keV[4]
Binding mass~3.3×1014[3] M☉
X-ray luminosity3.4×1042 h75−2 erg/s (0.5-10.0 keV)[4]
Other designations
Abell S0636

The Antlia Cluster (or Abell S0636) [4] is a cluster of galaxies located in the Hydra-Centaurus Supercluster. The Antlia Cluster is the third nearest to the Local Group after the Virgo Cluster and Fornax Cluster.[6] Antlia's distance from Earth is 40.5 Mpc (132.1 Mly) to 40.9 Mpc (133.4 Mly)[5] and can be viewed from Earth in the constellation Antlia.[5][7] The Antlia Cluster should not be confused with the Antlia Dwarf Galaxy.[5]

Antlia is classified as a rare Bautz-Morgan type III cluster,[4][3] meaning it has no central dominant (cD) brightest cluster galaxy.[8] However, the cluster is dominated by two massive elliptical galaxies, NGC 3268 and NGC 3258, and contains a total of about 234 galaxies.[4][5] 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.[5][7][clarification needed] The Cluster is split into two galaxy groups, The Northern subgroup gravitating around NGC 3268, and the Southern subgroup centered on NGC 3258.[5]

The cluster has an overall redshift of z = 0.0087, implying that the cluster is, like most objects in the Universe, receding from the Local Group.[4] Using the now-obsolete scientific satellite ASCA, X-ray observations show that the cluster is almost isothermal, with a mean temperature of kT ~ 2.0 keV.[4]

List of named objects in the Antlia Cluster

See also

References

  1. ^ a b "NASA/IPAC Extragalactic Database". Results for NGC 7424. Archived from the original on 16 December 2008. Retrieved 26 Nov 2008. {{cite web}}: Unknown parameter |deadurl= ignored (|url-status= suggested) (help)
  2. ^ a b Abell, George O.; Corwin, Harold G., Jr.; Olowin, Ronald P. (May 1989). "A catalog of rich clusters of galaxies" (PDF). Astrophysical Journal Supplement Series. 70 (May 1989): 1–138. Bibcode:1989ApJS...70....1A. doi:10.1086/191333. ISSN 0067-0049. Retrieved March 12, 2012.{{cite journal}}: CS1 maint: multiple names: authors list (link)
  3. ^ a b c Hopp, U.; Materne, J. (July 1985). "The Antlia cluster of galaxies and its environment - The Hydra I-Centaurus supercluster". Astronomy and Astrophysics Supplement Series. 61: 93–106. Bibcode:1985A&AS...61...93H. ISSN 0365-0138. Retrieved March 4, 2012.
  4. ^ a b c d e f g h i j k l m Nakazawa, Kazuhiro; Makishima, Kazuo; Fukazawa, Yasushi; Tamura, Takayuki (August 2000). "ASCA Observations of a Near-by Cluster in Antlia". Publications of the Astronomical Society of Japan. 52. Tokyo, Japan: PASJ: 623–630. Bibcode:2000PASJ...52..623N. doi:10.1093/pasj/52.4.623. Retrieved March 4, 2012. {{cite journal}}: Cite has empty unknown parameter: |trans_title= (help)
  5. ^ a b c d e f g Dirsch, B.; Richtler, T.; Bassino, L. P. (September 2003). "The globular cluster systems of NGC 3258 and NGC 3268 in the Antlia cluster". Astronomy and Astrophysics. 408. A&A: 929–939. arXiv:astro-ph/0307200. Bibcode:2003A&A...408..929D. doi:10.1051/0004-6361:20031027. Retrieved March 3, 2012. {{cite journal}}: Cite has empty unknown parameter: |trans_title= (help)
  6. ^ a b c d e f g h i j k l Smith Castelli, Analía V.; Bassino, Lilia P.; Richtler, Tom; Cellone, Sergio A.; Aruta, Cristian; Infante, Leopoldo (June 2008). "Galaxy populations in the Antlia cluster - I. Photometric properties of early-type galaxies". Monthly Notices of the Royal Astronomical Society. 386 (4). MNRAS: 2311–2322. arXiv:0803.1630. Bibcode:2008MNRAS.386.2311S. doi:10.1111/j.1365-2966.2008.13211.x. Retrieved March 4, 2012.{{cite journal}}: CS1 maint: multiple names: authors list (link) CS1 maint: unflagged free DOI (link)
  7. ^ a b Smith Castelli, A. V.; Bassino, L. P.; Cellone, S. A.; Richtler, T.; Dirsch, B.; Infante, L.; Aruta, C.; Gómez, M. (December 2005). "Dwarf Galaxies in the Antlia Cluster: First Results". In I. Saviane, V.D. Ivanov, J. Borissova (ed.). Groups of Galaxies in the Nearby Universe. Proceedings of the ESO Workshop. Vol. ESO ASTROPHYSICS SYMPOSIA. Springer-Verlag (2007). p. 109. Bibcode:2007ggnu.conf..109S. ISBN 978-3-540-71172-8. Retrieved March 4, 2012. {{cite conference}}: Cite has empty unknown parameter: |conferenceurl= (help); Unknown parameter |booktitle= ignored (|book-title= suggested) (help)CS1 maint: multiple names: editors list (link)
  8. ^ Guthrie, B. N. G. (July 1974). "Radio emission associated with the brightest galaxies in clusters". Monthly Notices of the Royal Astronomical Society. 168. MNRAS: 15–20. Bibcode:1974MNRAS.168...15G. doi:10.1093/mnras/168.1.15. A&AA ID: AAA012.160.002. Retrieved March 4, 2012.{{cite journal}}: CS1 maint: unflagged free DOI (link)

Further reading

  • Burnham Jr., Robert (1978) Burham's Celestial Handbook Revised Edition Vol. 1 of 3. Dover Publications. New York ISBN 0-486-24063-0


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