%0 Journal Article %1 citeulike:12922334 %A Sanders, J. S. %A Fabian, A. C. %A Sun, M. %A Churazov, E. %A Simionescu, A. %A Walker, S. A. %A Werner, N. %D 2014 %J Monthly Notices of the Royal Astronomical Society %K imported %N 1 %P 1182--1192 %R 10.1093/mnras/stu092 %T The X-ray coronae of the two brightest galaxies in the Coma cluster %U http://dx.doi.org/10.1093/mnras/stu092 %V 439 %X We use deep Chandra X-ray Observatory observations to examine the coronae of the two brightest cluster galaxies in the Coma cluster of galaxies, NGC 4874 and NGC 4889. We find that NGC 4889 hosts a central depression in X-ray surface brightness consistent with a cavity or pair of cavities of radius 0.6 kpc. If the central cavity is associated with an AGN outburst and contains relativistic material, its enthalpy should be around 5x10^55 erg. The implied heating power of this cavity would be around an order of magnitude larger than the energy lost by X-ray emission. It would be the smallest and youngest known cavity in a brightest cluster galaxy and the lack of over pressuring implies heating is still gentle. In contrast, NGC 4874 does not show any evidence for cavities, although it hosts a well-known wide-angle-tail radio source which is visible outside the region occupied by the X-ray corona. These two galaxies show that AGN feedback can behave in varied ways in the same cluster environment.

@article{citeulike:12922334, abstract = {{We use deep Chandra X-ray Observatory observations to examine the coronae of the two brightest cluster galaxies in the Coma cluster of galaxies, NGC 4874 and NGC 4889. We find that NGC 4889 hosts a central depression in X-ray surface brightness consistent with a cavity or pair of cavities of radius 0.6 kpc. If the central cavity is associated with an AGN outburst and contains relativistic material, its enthalpy should be around 5x10^55 erg. The implied heating power of this cavity would be around an order of magnitude larger than the energy lost by X-ray emission. It would be the smallest and youngest known cavity in a brightest cluster galaxy and the lack of over pressuring implies heating is still gentle. In contrast, NGC 4874 does not show any evidence for cavities, although it hosts a well-known wide-angle-tail radio source which is visible outside the region occupied by the X-ray corona. These two galaxies show that AGN feedback can behave in varied ways in the same cluster environment.}}, added-at = {2019-03-25T08:20:55.000+0100}, archiveprefix = {arXiv}, author = {Sanders, J. S. and Fabian, A. C. and Sun, M. and Churazov, E. and Simionescu, A. and Walker, S. A. and Werner, N.}, biburl = {https://www.bibsonomy.org/bibtex/28f08a27de0e437b2dd411dc0621b8d61/ericblackman}, citeulike-article-id = {12922334}, citeulike-linkout-0 = {http://arxiv.org/abs/1401.3131}, citeulike-linkout-1 = {http://arxiv.org/pdf/1401.3131}, citeulike-linkout-2 = {http://dx.doi.org/10.1093/mnras/stu092}, day = 14, doi = {10.1093/mnras/stu092}, eprint = {1401.3131}, interhash = {31128cefe2f5a79a10858f2fc58d03fa}, intrahash = {8f08a27de0e437b2dd411dc0621b8d61}, issn = {0035-8711}, journal = {Monthly Notices of the Royal Astronomical Society}, keywords = {imported}, month = jan, number = 1, pages = {1182--1192}, posted-at = {2014-01-16 03:45:50}, priority = {2}, timestamp = {2019-03-25T08:20:55.000+0100}, title = {{The X-ray coronae of the two brightest galaxies in the Coma cluster}}, url = {http://dx.doi.org/10.1093/mnras/stu092}, volume = 439, year = 2014 }