XMMXCS 2215-1738

From Wikipedia, the free encyclopedia
Jump to navigation Jump to search
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 groups, Galaxy clusters, List of galaxy 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; 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.

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.[1]

It contains hundreds of reddish galaxys surrounded by x-ray emitting gas,[3] it is theorized to have a mass 500 trillion times the mass of the Sun, most of which comes from dark matter.[1][4]

"The existence of the cluster so early in the history of the universe challenges ideas about how galaxies formed"

— 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 c 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. ^ http://www.news.ucdavis.edu/search/news_detail.lasso?id=7769 "Galaxy Cluster Most Distant from Earth Found, June 5, 2006, UC DAVIS
  4. ^ https://www.questia.com/read/1G1-146854459 The Journal (Newcastle, England) June 10, 2006
  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