Carnegie: Very Distant Galaxy Cluster Confirmed

[bystander]

[url=https://carnegiescience.edu/jkcs_041][b][i]JKCS 041:[/i][/b] [b][i]Credit: Hubble/Carnegie/Newman et al)[/i][/b][/url] Hubble Space Telescope image of the center of the newly-confirmed JKCS 041 galaxy cluster, located at a distance of 9.9 billion light years. The galaxies located in the cluster are circled. Blue circles show the few galaxies that continue to form new stars, while yellow circles show those that have already entered quiescence.

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Carnegie: Very Distant Galaxy Cluster Confirmed

The structures and star populations of massive galaxies appear to change as they age, but much about how these galaxies formed and evolved remains mysterious. Many of the oldest and most massive galaxies reside in clusters, enormous structures where numerous galaxies are found concentrated together. Galaxy clusters in the early universe are thought to be key to understanding the lifecycles of old galaxies, but to date astronomers have located only a handful of these rare, distant structures.

New research from a team led by Carnegie’s Andrew Newman has confirmed the presence of an unusually distant galaxy cluster, JKCS 041. ...

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Spectroscopic Confirmation of the Rich z = 1.80 Galaxy Cluster JKCS 041 using the WFC3 Grism:
Environmental Trends in the Ages and Structure of Quiescent Galaxies - Andrew B. Newman et al

• Astrophysical Journal 788(1) 51 (2014 Jun 10) DOI: 10.1088/0004-637X/788/1/51
  arXiv.org > astro-ph > arXiv:1310.6754 > 24 Oct 2013 (v1), 13 May 2014 (v2)

JKCS 041: a Coma cluster progenitor at z = 1.803 - S. Andreon et al

• Astronomy & Astrophysics 565 A120 (21 May 2014) DOI: 10.1051/0004-6361/201323077
  arXiv.org > astro-ph > arXiv:1311.4361 > 18 Nov 2013 (v1), 12 May 2014 (v2)