1538-4357_646_1_L13.pdf (821.97 kB)
The XMM Cluster Survey: a massive galaxy cluster at z = 1.45
journal contribution
posted on 2023-06-07, 23:07 authored by S A Stanford, Kathy RomerKathy Romer, Kivanc Sabirli, Michael Davidson, Matt Hilton, Pedro T P Viana, Chris A Collins, Scott T Kay, Andrew R Liddle, Robert G Mann, Christopher J Miller, Robert C Nichol, Michael J West, Christopher J Conselice, Hyron Spinrad, Daniel Stern, Kevin BundyWe report the discovery of XMMXCS J2215.9-1738, a massive galaxy cluster at z=1.45, which was found in the XMM Cluster Survey. The cluster candidate was initially identified as an extended X-ray source in archival XMM data. Optical spectroscopy shows that six galaxies within a ~60" diameter region lie at z=1.45+/-0.01. Model fits to the X-ray spectra of the extended emission yield kT=7.4+2.7-1.8 keV (90% confidence); if there is an undetected central X-ray point source, then kT=6.5+2.6-1.8 keV. The bolometric X-ray luminosity is LX=4.4+0.8-0.6C 1044 ergs s-1 over a 2 Mpc radial region. The measured TX, which is the highest for any known cluster at z>1, suggests that this cluster is relatively massive for such a high redshift. The redshift of XMMXCS J2215.9-1738 is the highest currently known for a spectroscopically confirmed cluster of galaxies.
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- Published version
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Astrophysical JournalISSN
0004-637XExternal DOI
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1Volume
646Page range
13-16Pages
4.0Department affiliated with
- Physics and Astronomy Publications
Notes
This paper presents the most distant X-ray cluster ever detected. As PI of the XCS, I have overall responsible for the pipeline X-ray processing that led to the discovery. I was also closely involved with the X-ray spectral analysis described in the paper.Full text available
- Yes
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Legacy Posted Date
2012-02-06First Open Access (FOA) Date
2016-03-22First Compliant Deposit (FCD) Date
2016-11-10Usage metrics
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