The XMM cluster survey:: A massive galaxy cluster at z=1.45

被引：157

作者：

Stanford, S. A. ^{[1
]}

Romer, A. Kathy

Sabirli, Kivanc

Davidson, Michael

Hilton, Matt

Viana, Pedro T. P.

Collins, Chris A.

Kay, Scott T.

Liddle, Andrew R.

Mann, Robert G.

Miller, Christopher J.

Nichol, Robert C.

West, Michael J.

Conselice, Christopher J.

Spinrad, Hyron

Stern, Daniel

Bundy, Kevin

机构：

[1] Univ Calif Davis, Davis, CA 95616 USA

[2] Lawrence Livermore Natl Lab, Inst Geophys & Planetary Phys, Livermore, CA 94551 USA

[3] Univ Sussex, Ctr Astron, Brighton BN1 9QJ, E Sussex, England

[4] Carnegie Mellon Univ, Dept Phys, Pittsburgh, PA 15217 USA

[5] Univ Edinburgh, Astron Inst, Edinburgh EH9 9HJ, Midlothian, Scotland

[6] Liverpool John Moores Univ, Astrophys Res Inst, Birkenhead CH41 1LD, Merseyside, England

[7] Univ Porto, Fac Ciencias, Dept Matemat Aplicada, P-4169007 Oporto, Portugal

[8] Univ Porto, Ctr Astrofis, P-4150762 Oporto, Portugal

[9] Natl Opt Astron Observ, Cerro Tololo Interamer Observ, Tucson, AZ 85719 USA

[10] Univ Portsmouth, Inst Cosmol & Gravitat, Portsmouth PO1 2EG, Hants, England

[11] Univ Hawaii, Dept Phys & Astron, Hilo, HI 96720 USA

[12] Gemini Observ, La Serena, Chile

[13] Univ Nottingham, Nottingham NG9 2RD, England

[14] Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA

[15] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA

[16] CALTECH, Pasadena, CA 91125 USA

来源：

ASTROPHYSICAL JOURNAL | 2006年 / 646卷 / 01期

关键词：

galaxies : clusters : general; galaxies : evolution; galaxies : formation;

D O I：

10.1086/506449

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report the discovery of XMMXCS J2215.9-1738, a massive galaxy cluster at, which was found z = 1.45 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 similar to 60 '' diameter region lie at. z p 1.45 +/- 0.01 Model fits to the X-ray spectra of the extended emission yield kT = 7.4(-1.8)(+2.7) keV (90% confidence); if there is an undetected central X-ray point source, then kT = 6.5(-1.8)(+2.6). The bolometric X-ray luminosity is L-x-0.6(+0.8) x 10(44) 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 of J2215.9-1738 is the highest currently known for a spectroscopically confirmed cluster of galaxies.

引用

页码：L13 / L16

页数：4

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