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

Authors:
M. Kawaharada, K. Makishima, T. Kitaguchi, S. Okuyama,
K. Nakazawa, and Y. Fukazawa

http://arxiv.org/abs/0911.5205

The nearby ($z=0.03015$) cluster of galaxies Abell 2199 was observed
by Suzaku in X-rays, with five pointings for ~20 ks each. From the
XIS data, the temperature and metal abundance profiles were derived
out to ~700 kpc (0.4 times virial radius). Both these quantities
decrease gradually from the center to peripheries by a factor of ~2,
while the oxygen abundance tends to be flat. The temperature within 12'
(~430 kpc) is ~4 keV, and the 0.5--10 keV X-ray luminosity integrated
up to 30'is (2.9 +- 0.1) x 1E44 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 ~1 keV, or in the
HXD-PIN range above ~15$ keV. The 90%-confidence upper limit on the
emission measure of an assumed 0.2 keV warm gas is (3.7--7.5) x 1E62
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 x 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 uG) which were suggested previously.