The XMM Cluster Survey: a massive galaxy cluster at z = 1.45

S. A. Stanford; A. Kathy 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 Bundy

doi:10.1086/506449

The XMM Cluster Survey: a massive galaxy cluster at z = 1.45

S. A. Stanford, A. Kathy 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 Bundy

Institute of Cosmology & Gravitation

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Abstract

We 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_-0.6 × 10⁴⁴ ergs s^-1 over a 2 Mpc radial region. The measured T_X, 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.

Original language	English
Pages (from-to)	L13-L16
Journal	The Astrophysical Journal
Volume	646
Issue number	1
Early online date	14 Jul 2006
DOIs	https://doi.org/10.1086/506449
Publication status	Published - 20 Jul 2006

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copyright 2006. The American Astronomical Society.
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Stanford, S. A., Romer, A. K., Sabirli, K., Davidson, M., Hilton, M., Viana, P. T. P., Collins, C. A., Kay, S. T., Liddle, A. R., Mann, R. G., Miller, C. J., Nichol, R. C., West, M. J., Conselice, C. J., Spinrad, H., Stern, D., & Bundy, K. (2006). The XMM Cluster Survey: a massive galaxy cluster at z = 1.45. The Astrophysical Journal, 646(1), L13-L16. https://doi.org/10.1086/506449

@article{94dbdb56870447c8b504ffa8a46f1f4d,

title = "The XMM Cluster Survey: a massive galaxy cluster at z = 1.45",

abstract = "We 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 \textasciitilde{}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+0.8-0.6 × 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.",

author = "Stanford, \{S. A.\} and Romer, \{A. Kathy\} and Kivanc Sabirli and Michael Davidson and Matt Hilton and Viana, \{Pedro T. P.\} and Collins, \{Chris A.\} and Kay, \{Scott T.\} and Liddle, \{Andrew R.\} and Mann, \{Robert G.\} and Miller, \{Christopher J.\} and Nichol, \{Robert C.\} and West, \{Michael J.\} and Conselice, \{Christopher J.\} and Hyron Spinrad and Daniel Stern and Kevin Bundy",

year = "2006",

month = jul,

day = "20",

doi = "10.1086/506449",

language = "English",

volume = "646",

pages = "L13--L16",

journal = "The Astrophysical Journal",

issn = "0004-637X",

publisher = "American Astronomical Society",

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TY - JOUR

T1 - The XMM Cluster Survey

T2 - a massive galaxy cluster at z = 1.45

AU - Stanford, S. A.

AU - Romer, A. Kathy

AU - Sabirli, Kivanc

AU - Davidson, Michael

AU - Hilton, Matt

AU - Viana, Pedro T. P.

AU - Collins, Chris A.

AU - Kay, Scott T.

AU - Liddle, Andrew R.

AU - Mann, Robert G.

AU - Miller, Christopher J.

AU - Nichol, Robert C.

AU - West, Michael J.

AU - Conselice, Christopher J.

AU - Spinrad, Hyron

AU - Stern, Daniel

AU - Bundy, Kevin

PY - 2006/7/20

Y1 - 2006/7/20

N2 - We 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+0.8-0.6 × 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.

AB - We 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+0.8-0.6 × 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.

U2 - 10.1086/506449

DO - 10.1086/506449

M3 - Article

SN - 0004-637X

VL - 646

SP - L13-L16

JO - The Astrophysical Journal

JF - The Astrophysical Journal

IS - 1

ER -

The XMM Cluster Survey: a massive galaxy cluster at z = 1.45

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