دورية
Chandra Observations of A 2670 and A 2107: A Comet Galaxy and cDs with Large Peculiar Velocities
| العنوان: | Chandra Observations of A 2670 and A 2107: A Comet Galaxy and cDs with Large Peculiar Velocities |
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| المؤلفون: | Fujita, Yutaka, Sarazin, Craig L., Sivakoff, Gregory R. |
| المصدر: | Publications of the Astronomical Society of Japan; February 2006, Vol. 58 Issue: 1 p131-141, 11p |
| مستخلص: | We present an analysis of Chandra observations of the galaxy clusters A 2670 and A 2107. Their cD galaxies have large peculiar velocities ($\gt200 \,\mathrm{km} \,\mathrm{s}^{-1} \gt200 \,\mathrm{km} \,\mathrm{s}^{-1}$) and thus the clusters appear to be undergoing mergers. In A 2670, we find a comet-like structure around one of the brightest galaxies. At the leading edge of the structure, there is a cold front. The mass of the X-ray gas in the comet-like structure suggests that the galaxy was in a small cluster or group, and its intracluster medium is being stripped by ram-pressure. The regions of cool interstellar medium of the cD galaxies in A 2670 and A 2107 are very compact. This is similar to the brightest galaxies in the Coma cluster, which is also a merging cluster. In each galaxy, the short cooling time of the ISM requires a heating source; the compact nature of the ISM makes it unlikely that the heating source is a central active galactic nucleus. |
| قاعدة البيانات: | Supplemental Index |
Full Text Finder | تدمد: | 00046264 2053051X |
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| DOI: | 10.1093/pasj/58.1.131 |