SUZAKU OBSERVATIONS OF THE OUTSKIRTS OF A1835: DEVIATION FROM HYDROSTATIC EQUILIBRIUM

SUZAKU OBSERVATIONS OF THE OUTSKIRTS OF A1835: DEVIATION FROM HYDROSTATIC EQUILIBRIUM

We present results of four-pointing Suzaku X-ray observations (total ~200 ks) of the intracluster medium (ICM) in the A1835 galaxy cluster (kT ~ 8 keV, z = 0.253) out to the virial radius (r sub(vir) ~ 2.9 Mpc) and beyond. Faint X-ray emission from the ICM out to r sub(vir) is detected. The temperat...

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Veröffentlicht in:The Astrophysical journal 2013-04, Vol.766 (2), p.1-19
Hauptverfasser: Ichikawa, Kazuya, Matsushita, Kyoko, Okabe, Nobuhiro, Sato, Kosuke, Zhang, Y-Y, FINOGUENOV, A, Fujita, Yutaka, Fukazawa, Yasushi, KAWAHARADA, MADOKA, Nakazawa, Kazuhiro, Ohashi, Takaya, Ota, Naomi, Takizawa, Motokazu, Tamura, Takayuki, Umetsu, Keiichi
Format: Artikel
Sprache:eng
Schlagworte:
ANISOTROPY
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
BARYONS
Clusters
DENSITY
Deviation
ENTROPY
GALAXY CLUSTERS
HYDROSTATICS
KEV RANGE
KINETIC ENERGY
Mathematical models
MICROWAVE RADIATION
PHOTON EMISSION
Planck satellite
RED SHIFT
SATELLITES
SHOCK HEATING
TEMPERATURE DISTRIBUTION
X RADIATION
X-RAY GALAXIES
X-rays
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Zusammenfassung:We present results of four-pointing Suzaku X-ray observations (total ~200 ks) of the intracluster medium (ICM) in the A1835 galaxy cluster (kT ~ 8 keV, z = 0.253) out to the virial radius (r sub(vir) ~ 2.9 Mpc) and beyond. Faint X-ray emission from the ICM out to r sub(vir) is detected. The temperature gradually decreases with radius from ~8 keV in the inner region to ~2 keV at r sub(vir). The entropy profile is shown to flatten beyond r sub(500), in disagreement with the r super(1.1) dependence predicted from the accretion shock heating model. The thermal pressure profile in the range 0.3r sub(500) [
ISSN:0004-637X
1538-4357
DOI:10.1088/0004-637X/766/2/90