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Post Info TOPIC: NGC 741


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Title: NGC 741 - Mergers and AGN feedback on galaxy group scale
Author: G. Schellenberger, J. M. Vrtilek, L. David, E. O'Sullivan, S. Giacintucci, M. Johnston-Hollitt, S. W. Duchesne, S. Raychaudhury

Low mass galaxy cluster systems and groups play an essential role in upcoming cosmological studies such as those to be carried out with eROSITA. Though the effects of active galactic nuclei (AGNs) and merging processes are of special importance to quantify biases like selection effects or deviations from hydrostatic equilibrium, they are poorly understood on the galaxy group scale. We present an analysis of recent deep Chandra and XMM-Newton integrations of NGC741, which provides an excellent example of a group with multiple concurrent phenomena: both an old central radio galaxy and a spectacular infalling head-tail source, strongly-bent jets, a 100kpc radio trail, intriguing narrow X-ray filaments, and gas sloshing features. Supported principally by X-ray and radio continuum data, we address the merging history of the group, the nature of the X-ray filaments, the extent of gas stripping from NGC742, the character of cavities in the group, and the roles of the central AGN and infalling galaxy in heating the intra-group medium.

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NGC 741 (also IC 1751, UGC 1413, MCG 1-6-3, 2MASX J01562094+0537437, and PGC 7252) is a magnitude +11.3 elliptical galaxy located 248 ±18 million light-years away in the constellation Pisces. 

The galaxy was discovered by German-British astronomer William Herschel using a 47.5 cm (18.7 inch) f/13 speculum reflector at Datchet, Berkshire, on the 13th December 1784.
The galaxy was observed by Lewis A. Swift on the 16th November 1897, and listed as IC 1751.

Right ascension 1h 56m 20.959s, Declination +5° 37' 43.77"



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