Hydra Cluster

From Wikipedia, the free encyclopedia
Jump to: navigation, search
Hydra Cluster
Hyamap.gif
A map of Hydra cluster
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 6.1×1011 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[edit]

  1. ^ a b c d "NASA/IPAC Extragalactic Database". Results for Abell 2151. Retrieved 13 June 2013. 
  2. ^ "National Optical Astronomy Observatory". Galaxies. Retrieved 19 July 2007. 
  3. ^ 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. ISSN 0067-0049. doi:10.1086/191333. 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[edit]

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