Chandra Observations of NGC 4636--an Elliptical Galaxy in Turmoil
Author(s) -
C. Jones,
W. Forman,
A. Vikhlinin,
M. Markevitch,
L. P. David,
A. Warmflash,
S. S. Murray,
P. E. J. Nulsen
Publication year - 2002
Publication title -
the astrophysical journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.376
H-Index - 489
eISSN - 1538-4357
pISSN - 0004-637X
DOI - 10.1086/340114
Subject(s) - astrophysics , physics , galaxy , halo , astronomy
Chandra images show symmetric, 8 kpc long, arm-like features in the X-rayhalo surrounding NGC 4636. The leading edges of these features are sharp andare accompanied by temperature increases of ~30%. These properties, along withtheir scale and symmetry, suggest that the arm-like structures are produced bynuclear outburst driven shocks. We interpret these observations as part of acycle in which cooling gas originally fueled a nuclear outburst about 3 X10^{6} years ago leading to shocks that reheat the cooling gas, thus preventingthe accumulation of significant amounts of cooled gas in the galaxy center andtemporarily starving the central AGN.Comment: submitted to ApJ Letter
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