Hydra Cluster

Not to be confused with Hydra-Centaurus Supercluster.
Hydra Cluster

Hydra A galaxy cluster
Chandra X-ray; 30 October 1999
Observation data (Epoch J2000)
Constellation(s) Hydra
Right ascension 09h 18.0m[1]
Declination −12° 05′[1]
Number of galaxies 157[2]
Richness class 1[3]
Bautz-Morgan classification III[3]
Redshift 0.0548 (16452 km/s)[1]
Distance
(co-moving)		 222 Mpc (724.1 Mly) h−1
0.705
X-ray flux 6.1×10−11 erg s−1 cm−2 (0.5—2 keV)[1]
Other designations
Abell 1060
See also: Galaxy groups, Galaxy clusters, List of galaxy clusters

The Hydra Cluster (or Abell 1060) is a galaxy cluster that contains 157 bright galaxies, appearing in the constellation Hydra.[4] The cluster spans about ten million light years and has an unusually high proportion of dark matter.[5] The cluster is part of the Hydra-Centaurus Supercluster located 158 million light years from earth. The cluster's largest galaxies are elliptical galaxies NGC 3309 and NGC 3311 and the spiral galaxy NGC 3312 all having a diameter of about 150,000 light years.[6] In spite of a nearly circular appearance on the sky, there is evidence in the galaxy velocities for a clumpy, three-dimensional distribution.[7]

References

  1. 1 2 3 4 "NASA/IPAC Extragalactic Database". Results for Abell 2151. Retrieved 13 June 2013.
  2. ↑ "National Optical Astronomy Observatory". Galaxies. Retrieved 19 July 2007.
  3. 1 2 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 12 March 2012.
  4. ↑ Wehner and Harris, p.1
  5. ↑ Nemiroff, R.; Bonnell, J., eds. (16 April 2001). "The Hydra Cluster of Galaxies". Astronomy Picture of the Day. NASA.
  6. ↑ The Hydra Supercluster An Atlas of the Universe.com
  7. ↑ Fitchett, Michael; Merritt, David (December 1988). "Dynamics of the Hydra I Galaxy Cluster". The Astrophysical Journal. 335: 18–34. Bibcode:1988ApJ...335...18F. doi:10.1086/166902.

Related reading

Coordinates: 10h 36.9m 00s, −27° 32′ 00″


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