XMMXCS 2215-1738

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XMXCS 2215-1738
Observation data (Epoch J2000)
Right ascension 22h 15m 58.5s
Declination−17° 38′ 02″
Other designations
BLOX J2215.9-1738.1
See also: Galaxy group, Galaxy cluster, List of galaxy groups and clusters

XMMXCS 2215-1738 is a galaxy cluster that lies 10 billion light-years away and has a redshift value of z=1.45. It was discovered by the XMM Cluster Survey in 2006.[1]

Discovered in 2006, XMMXCS 2215-1738 is one of the most distant galaxy clusters known. It is embedded in intergalactic gas that has a temperature of 10 million degrees.[2] The estimated mass of the cluster is 500 trillion solar masses, most coming from dark matter. The cluster was discovered and studied using the XMM-Newton and Keck Telescopes. The cluster is surprisingly large and evolved for a cluster that existed when the universe was only 3 billion years old.[1][3]

Led by University of Sussex researchers, part of the XMM Cluster Survey (XCS) used X-ray Multi Mirror (XMM) Newton satellite to find it, Keck Telescope to determine distance, and used the Hubble Space Telescope to further image it.

It contains hundreds of reddish galaxys surrounded by x-ray-emitting gas.[4]

— Adam Stanford, research scientist at UC Davis and the Lawrence Livermore National Laboratory[5]

The galaxy is called XMMXCS 2215-1734 in many references, with some news sources listing both names. The source of the naming contradiction between XMMXCS 2215-1734 and XMMXCS 2215-1738 is not known. However, XMMXCS 2215-1738 seems to be the more accurate.

See also[edit]


  1. ^ a b http://www.physorg.com/news68820846.html Massive galaxy cluster found 10 billion light years away June 6th, 2006, Space & Earth magazine
  2. ^ http://www.cmu.edu/cmnews/extra/060615_galaxy.html
  3. ^ https://www.questia.com/read/1G1-146854459 The Journal (Newcastle, England) June 10, 2006
  4. ^ http://www.news.ucdavis.edu/search/news_detail.lasso?id=7769 "Galaxy Cluster Most Distant from Earth Found, June 5, 2006, UC DAVIS
  5. ^ http://www.universetoday.com/8232/most-distant-galaxy-cluster-discovered/

External links[edit]

Preceded by
Most massive
distant (z~>=1)
galaxy cluster

2006 – 
Succeeded by
Preceded by
Most distant galaxy cluster
2006 – 
Succeeded by