arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 0709.1336astro-ph
收藏

英仙座星系团核心的X射线活动星系核

X-ray active galactic nuclei in the core of the Perseus cluster

S. Santra, J. S. Sanders, A. C. Fabian

摘要:

本文利用钱德拉望远镜对英仙座星系团的星系核进行了深曝光观测,并对观测到的星系核的X射线辐射进行了研究。发现点源与13个早型星系和中心星系NGC 1275的核一致。这对应于钱德拉场中所有亮度大于M_B = -18的星系。所有这些来源有一个陡峭的幂律谱分量和四个有一个额外的热分量。在0.5-7.0 keV波段,未吸收的幂律光度范围为8.10^38-5.10^40 erg/s。我们发现这些星系的K波段光度、FUV和NUV AB星等与它们的X射线性质之间没有简单的相关性。我们用K带M_BH-L_K关系估计了核的黑洞质量,并再次发现黑洞质量与X射线光度之间没有相关性。邦迪吸积到星系中的黑洞上,使它们比观测到的要亮得多。

英文摘要:

We present a study of the X-ray emission from the nuclei of galaxies observed in the core of the Perseus cluster in a deep exposure with Chandra. Point sources are found coincident with the nuclei of 13 early-type galaxies, as well as the central galaxy NGC1275. This corresponds to all galaxies brighter than M_B = -18 in the Chandra field. All of these sources have a steep power-law spectral component and four have an additional thermal component. The unabsorbed power-law luminosities in the 0.5-7.0 keV band range from 8.10^38-5.10^40 erg/s. We find no simple correlations between the K band luminosity, or the FUV and NUV AB magnitudes of these galaxies and their X-ray properties. We have estimated the black hole masses of the nuclei using the K band M_BH-L_K relation and again find no correlation between black hole mass and the X-ray luminosity. Bondi accretion onto the black holes in the galaxies with mini-haloes should make them much more luminous than observed.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑