Open AccessChandra observations of Abell 2199
Author(s) -
Johnstone R. M.,
Allen S. W.,
Fabian A. C.,
Sanders J. S.
Publication year - 2002
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1046/j.1365-8711.2002.05743.x
Subject(s) - physics , astrophysics , metallicity , surface brightness , galaxy , solar mass , astronomy , galaxy cluster , cluster (spacecraft) , computer science , programming language
We present results from an analysis of two Chandra observations of the rich, nearby galaxy cluster Abell 2199. We find evidence (having corrected for projection effects) for radial gradients in temperature and metallicity in the X‐ray emitting gas: the temperature drops from kT ∼ 4.2 keV at R = 200 kpc to 1.6 keV within R = 5 kpc of the centre. The metallicity rises from ∼0.3 solar at R = 200 kpc to ∼0.7 solar at R = 30 kpc before dropping to 0.3 solar within the central 5 kpc. We find evidence for structure in the surface brightness distribution associated with the central radio source 3C 338. No evidence is found for the gas having a large spread in temperature at any particular location despite the cooling time being short (<10 9 yr) within the central ∼15 kpc. Heating and mass cooling rates are calculated for various assumptions about the state of the gas.