X-ray Imaging Spectroscopy of Abell 1835

Details X-ray Imaging Spectroscopy of Abell 1835 X-ray Imaging Spectroscopy of Abell 1835

2000-10-31

arxiv.org/abs/astro-ph/0010658v1

Astron.Astrophys.365:l104-109,2001

Astronomy and Astrophysics

Astrophysics

6 pages, 4 figures, Accepted by A&A letters, XMM issue

Scientific paper

10.1051/0004-6361:20000021

We present detailed spatially-resolved spectroscopy results of the observation of Abell 1835 using the European Photon Imaging Cameras (EPIC) and the Reflection Grating Spectrometers (RGS) on the XMM-Newton observatory. Abell 1835 is a luminous ($10^{46}$ ergs ${s}^{-1}$), medium redshift ($z=0.2523$), X-ray emitting cluster of galaxies. The observations support the interpretation that large amounts of cool gas are present in a multi-phase medium surrounded by a hot ($kT_{e}$=8.2 keV) outer envelope. We detect O VIII Ly$\alpha$ and two Fe XXIV complexes in the RGS spectrum. The emission measure of the cool gas below $kT_{e}$=2.7 keV is much lower than expected from standard cooling-flow models, suggesting either a more complicated cooling process than simple isobaric radiative cooling or differential cold absorption of the cooler gas.

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