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Title:
X-ray Spectroscopy of the Core of the Perseus Cluster with Suzaku: Elemental Abundances in the Intracluster Medium
Authors:
Tamura, T.; Maeda, Y.; Mitsuda, K.; Fabian, A. C.; Sanders, J. S.; Furuzawa, A.; Hughes, J. P.; Iizuka, R.; Matsushita, K.; Tamagawa, T.
Affiliation:
AA(Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, 3-1-1 Yoshinodai, Sagamihara, Kanagawa 229-8510, Japan ), AB(Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, 3-1-1 Yoshinodai, Sagamihara, Kanagawa 229-8510, Japan ), AC(Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, 3-1-1 Yoshinodai, Sagamihara, Kanagawa 229-8510, Japan ), AD(Institute of Astronomy, Madingley Road, Cambridge CB3 0HA, UK ), AE(Institute of Astronomy, Madingley Road, Cambridge CB3 0HA, UK ), AF(Department of Particle and Astrophysics, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602, Japan ), AG(Department of Physics and Astronomy, Rutgers University, Piscataway, NJ 08854-8019, USA ), AH(Department of Physics, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan ), AI(Department of Physics, Tokyo University of Science, 1-3 Kagurazaka, Shinjyuku-ku, Tokyo 162-8601, Japan ), AJ(RIKEN (Institute of Physical and Chemical Research), 2-1 Hirosawa, Wako, Saitama 351-0198, Japan)
Publication:
The Astrophysical Journal Letters, Volume 705, Issue 1, pp. L62-L66 (2009). (ApJL Homepage)
Publication Date:
11/2009
Origin:
IOP
ApJ Keywords:
galaxies: clusters: general, galaxies: clusters: individual: Perseus, X-rays: galaxies
DOI:
10.1088/0004-637X/705/1/L62
Bibliographic Code:
2009ApJ...705L..62T

Abstract

The results from Suzaku observations of the central region of the Perseus cluster are presented. Deep exposures with the X-ray Imaging Spectrometer provide high-quality X-ray spectra from the intracluster medium. X-ray lines from helium-like Cr and Mn have been detected significantly for the first time in clusters. In addition, elemental abundances of Ne, Mg, Si, S, Ar, Ca, Fe, and Ni are accurately measured within 10' (or 220 kpc) from the cluster center. The relative abundance ratios are found to be within a range of 0.8-1.5 times the solar value. These abundance ratios are compared with previous measurements, those in extremely metal-poor stars in the Galaxy, and theoretical models.
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