SIMBAD references

1999ApJ...524..603S - Astrophys. J., 524, 603-611 (1999/October-3)

Temperature variation in the cluster of galaxies Abell 115 studied with ASCA.

SHIBATA R., HONDA H., ISHIDA M., OHASHI T. and YAMASHITA K.

Abstract (from CDS):

Abell 115 exhibits two distinct peaks in the surface brightness distribution. Observation with ASCA shows a significant temperature variation in this cluster, confirmed by a hardness ratio analysis and spectral fits. A linking region between the main cluster and subcluster shows a high temperature compared with other regions. Two possibilities are examined as the cause of the temperature variation: cooling flows in the main cluster and a shock heating due to the collision of the subcluster into the main system. Spectral fits with cooling flow models to the main-cluster data show a mass-deposition rate less than 419 M.yr–1. Temperatures in the main cluster, the linking region, and the subcluster are estimated by correcting for the effects of X-ray telescope response as 4.9+0.7–0.6, 11+12–4, and 5.2+1.4–1.0 keV, respectively. The high temperature in the linking region implies that Abell 115 is indeed a merger system, with possible contribution from cooling flows on the temperature structure.

Abstract Copyright:

Journal keyword(s): galaxies: clusters: individual (Abell 115) - Galaxies: Evolution - Galaxies: Irregular - X-Rays: Galaxies

Simbad objects: 9

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