arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1712.02414astro-ph.GA
收藏

光学和X射线AGN是否大部分不相交?

Are optical and X-ray AGN mostly disjoint?

Yu-Xiao Dai, Glennys R. Farrar

摘要:

光学和X射线选择的活动星系核(AGN)之间的关系一直不清楚,由于不同的研究结果不同。Arnold等人(2009)声称X射线活动星系核几乎完全不与光学活动星系核相交,而Swift-BAT的70个月硬X射线巡天报告说,他们的711个X射线活动星系核中有553个是光学活动星系核。在这项工作中,我们着手了解这些研究之间的交叉检查,并检查他们的采样和活动星系核的选择标准,这种差异。我们还使用我们自己的光谱拟合技术重新分析了Arnold等人报道的16个星系群和星系团中的X射线和光学活动星系核。我们发现Arnold等人样品中的8个X射线活动星系核中有6个也是光学活动星系核,与Arnold等人的结果相反。的报道,在8个X射线活动星系核中,只有1个是光学活动星系核,从而否定了他们关于光学活动星系核和X射线活动星系核是几乎不相交的集合的结论。

英文摘要:

The relationship between the populations of optically and X-ray selected Active Galactic Nuclei (AGN) has been unclear due to divergent results from different studies. Arnold et al. (2009) claim that X-ray AGN are almost entirely disjoint from optical AGN, while the Swift-BAT 70-month hard X-ray survey reported that 553 of their 711 X-ray AGN are optical. In this work, we set out to understand this difference by cross-checking between these studies and examining their sampling and AGN-selection criteria. We also re-analyze the X-ray and optical AGN in 16 groups and clusters reported by Arnold et al. using our own optical spectrum fitting techniques. We find that 6 of the 8 X-ray AGN in the Arnold et al. sample are also optical AGN, contrary to Arnold et al.'s report that only 1 of the 8 X-ray AGN is also an optical AGN, thereby falsifies their conclusion that optical and X-ray AGN are nearly disjoint sets.

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。

↑