X-ray imaging-spectroscopy of Abell 1835
Abstract
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 (1046 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 Lyalpha 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.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- January 2001
- DOI:
- 10.1051/0004-6361:20000021
- arXiv:
- arXiv:astro-ph/0010658
- Bibcode:
- 2001A&A...365L.104P
- Keywords:
-
- GALAXY CLUSTERS: INDIVIDUAL: ABELL 1835;
- GALAXIES: COOLING FLOWS;
- TECHNIQUES: SPECTROSCOPIC;
- Astrophysics
- E-Print:
- 6 pages, 4 figures, Accepted by A&