HIGH-RESOLUTION XMM-NEWTON SPECTROSCOPY OF THE COOLING FLOW CLUSTER A3112

We examine high signal-to-noise XMM-Newton European Photon Imaging Camera (EPIC) and Reflection Grating Spectrometer (RGS) observations to determine the physical characteristics of the gas in the cool core and outskirts of the nearby rich cluster A3112. The XMM-Newton Extended Source Analysis Softwa...

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Bibliographic Details
Published in:The Astrophysical journal 2012-03, Vol.747 (1), p.1-12
Main Authors: ESRA BULBUL, G, SMITH, Randall K, FOSTER, Adam, COTTAM, Jean, LOEWENSTEIN, Michael, MUSHOTZKY, Richard, SHAFER, Richard
Format: Article
Language:English
Subjects:
ABUNDANCE
ANISOTROPY
Astronomy
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
CAMERAS
Clusters
Computational fluid dynamics
COMPUTER CODES
COMPUTERIZED SIMULATION
Coolers
Earth, ocean, space
Exact sciences and technology
Fluxes
GALACTIC EVOLUTION
IRON
MASS
OXYGEN
PHOTONS
SILICON
Spectral lines
SPECTROMETERS
SPECTROSCOPY
TURBULENCE
X-RAY GALAXIES
XMM (spacecraft)
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Summary:We examine high signal-to-noise XMM-Newton European Photon Imaging Camera (EPIC) and Reflection Grating Spectrometer (RGS) observations to determine the physical characteristics of the gas in the cool core and outskirts of the nearby rich cluster A3112. The XMM-Newton Extended Source Analysis Software data reduction and background modeling methods were used to analyze the XMM-Newton EPIC data. From the EPIC data, we find that the iron and silicon abundance gradients show significant increase toward the center of the cluster while the oxygen abundance profile is centrally peaked but has a shallower distribution than that of iron. The X-ray mass modeling is based on the temperature and deprojected density distributions of the intracluster medium determined from EPIC observations. The total mass of A3112 obeys the M-T scaling relations found using XMM-Newton and Chandra observations of massive clusters at r sub(500). The gas mass fraction [functionof] sub(gas) = 0.149 super(+0.036) sub(-0.032) at r sub(500) is consistent with the seven-year Wilkinson Microwave Anisotropy Probe results. The comparisons of line fluxes and flux limits on the Fe XVII and Fe XVIII lines obtained from high-resolution RGS spectra indicate that there is no spectral evidence for cooler gas associated with the cluster with temperature below 1.0 keV in the central
ISSN:0004-637X
1538-4357
DOI:10.1088/0004-637X/747/1/32