X-ray spectroscopy of the cluster of galaxies Abell 1795 with XMM-Newton

被引：319

作者：

Tamura, T

Kaastra, JS

Peterson, JR

Paerels, FBS

Mittaz, JPD

Trudolyubov, SP

Stewart, G

Fabian, AC

Mushotzky, RF

Lumb, DH

Ikebe, Y

机构：

[1] SRON, Space Res Lab, NL-3584 CA Utrecht, Netherlands

[2] Columbia Univ, Astrophys Lab, New York, NY 10027 USA

[3] UCL, Mullard Space Sci Lab, Dept Space & Climate Phys, Surrey, England

[4] Los Alamos Natl Lab, NIS 2, Los Alamos, NM 87545 USA

[5] Univ Leicester, Dept Phys & Astron, Leicester LE1, Leics, England

[6] Univ Cambridge, Inst Astron, Cambridge CB3 0HA, England

[7] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA

[8] European Space Agcy, ESTEC, Div Astrophys, NL-2200 AG Noordwijk, Netherlands

[9] Max Planck Inst Extraterr Phys, D-85741 Garching, Germany

来源：

ASTRONOMY & ASTROPHYSICS | 2001年 / 365卷 / 01期

关键词：

galaxies : clusters : individual : Abell 1795; galaxies : clusters : general; galaxies : cooling flows; X-rays : galaxies;

D O I：

10.1051/0004-6361:20000038

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The initial results from XMM-Newton observations of the rich cluster of galaxies Abell 1795 are presented. The spatially-resolved X-ray spectra taken by the European Photon Imaging Cameras (EPIC) show a temperature drop at a radius of similar to 200 kpc from the cluster center, indicating that the ICM is cooling. Both the EPIC and the Reflection Grating Spectrometers (RGS) spectra extracted from the cluster center can be described by an isothermal model with a temperature of similar to4 keV. The volume emission measure of any cool component (< 1 keV) is less than a few % of the hot component at the cluster center. A strong O-VIII Lyman <alpha> line was detected with the RGS from the cluster core. The O abundance and its ratio to Fe at the cluster center is 0.2-0,5 and 0.5-1.5 times the solar value, respectively.

引用

页码：L87 / L92

页数：6

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