Suzaku Constraints on the Soft and Hard Excess Emissions from Abell 2199

Abstract

The nearby ($z=0.03015$) cluster of galaxies Abell~2199 was observed by Suzaku in X-rays, with five pointings for $\sim 20$ ks each. From the XIS data, the temperature and metal abundance profiles were derived out to $\sim 700$ kpc (0.4 times virial radius). Both these quantities decrease gradually from the center to peripheries by a factor of $\sim 2$, while the oxygen abundance tends to be flat. The temperature within 12' ($\sim 430$ kpc) is $\sim 4$ keV, and the 0.5--10 keV X-ray luminosity integrated up to 30' is $(2.9\pm 0.1)\times 10^{44}$ erg s${}^{-1}$, in agreement with previous XMM-Newton measurements. Above this thermal emission, no significant excess was found either in the XIS range below $\sim 1$ keV, or in the HXD-PIN range above $\sim 15$ keV. The 90%-confidence upper limit on the emission measure of an assumed 0.2 keV warm gas is (3.7--7.5) $\times 10^{62}$ cm${}^{-3}$ arcmin${}^{-2}$, which is 3.7--7.6 times tighter than the detection reported with XMM-Newton. The 90%-confidence upper limit on the 20--80 keV luminosity of any power law component is $1.8\times 10^{43}$ erg s${}^{-1}$, assuming a photon index of 2.0. Although this upper limit does not reject the possible 2.1$\sigma$ detection by the BeppoSAX PDS, it is a factor of 2.1 tighter than that of the PDS if both are considered upper limits. The non-detection of the hard excess can be reconciled with the upper limit on diffuse radio emission, without invoking the very low magnetic fields ($<0.073\mu$G) which were suggested previously.

28 pages, 10 figures, accepted for publication in PASJ

References in corpus (7)

• A Catalog of Galaxy Clusters Observed by XMM-Newton
• Nonthermal hard X-ray excess in the Coma cluster: resolving the discrepancy between the results of different PDS data analyses
• Analysis and Interpretation of Hard X-ray Emission from the Bullet Cluster (1E0657-56), the Most Distant Cluster of Galaxies Observed by RXTE
• On the Lack of a Soft X-Ray Excess from Clusters of Galaxies
• Isothermal shocks in Abell 2199 and 2A 0335+096?
• Revisiting the soft X-ray excess emission in clusters of galaxies observed with XMM-Newton
• On the lack of strong O-line excess in the Coma cluster outskirts from Suzaku

Cited by in corpus (7)

• Diffuse Radio Emission from Galaxy Clusters
• The Cluster Velocity Dispersion of the Abell 2199 cD Halo of NGC 6166
• Metallicity of the Fossil Group NGC 1550 Observed with Suzaku
• X-ray Spectroscopy of Clusters of Galaxies
• Investigating the hard X-ray emission from the hottest Abell cluster A2163 with Suzaku
• A high coverage view of the thermodynamics and metal abundance in the outskirts of the nearby galaxy cluster Abell 2199
• Dashing through the cluster: An X-ray to radio view of UGC 10420 undergoing ram-pressure stripping