arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1504.02706astro-ph.HE
收藏

费米耀变体的基本性质和“耀变体序列”

Basic properties of Fermi blazars and the "blazar sequence"

Dingrong Xiong, Xiong Zhang, Jinming Bai, Haojing Zhang

摘要:

通过对费米探测和非费米探测的耀变体样本的统计分析,发现费米探测耀变体和非费米探测耀变体在红移、黑洞质量、喷流动力学功率与“腔”功率、宽线光度以及核心光度与V带绝对星等的比值等方面存在显著差异($R_{\rm v}$),但不适用于无线电核心扩展通量比($R_{\rm c}$)和爱丁顿比。与NFB相比,FBs的平均喷流功率、$R_{\rm c}$和$R_{\rm v}$较大,而平均红移、黑洞质量和宽线光度较小。这些结果支持了聚束效应是导致FB和NFB之间差异的主要原因,并且FB可能具有更强大的喷流。对于费米和非费米blazar,喷注功率与吸积率(由宽发射线光度跟踪)、喷注功率与黑洞质量之间存在显著的相关性;对于费米blazar,黑洞质量对喷注功率没有显著影响;而对于非费米blazar,吸积率和黑洞质量对喷注功率均有贡献.我们的结果支持“耀变体序列”,并表明同步辐射峰值频率($ν_{\rm peak}$)与吸积率有关,而与黑洞质量无关。

英文摘要:

By statistically analyzing a large sample which includes blazars of Fermi detection (FBs) and non-Fermi detection (NFBs), we find that there are significant differences between FBs and NFBs for redshift, black hole mass, jet kinetic power from "cavity" power, broad-line luminosity, and ratio of core luminosity to absolute V-band magnitude ($R_{\rm v}$), but not for ratio of radio core to extended flux ($R_{\rm c}$) and Eddington ratio. Compared with NFBs, FBs have larger mean jet power, $R_{\rm c}$ and $R_{\rm v}$ while smaller mean redshift, black hole mass, broad-line luminosity. These results support that the beaming effect is main reason for differences between FBs and NFBs, and that FBs are likely to have a more powerful jet. For both Fermi and non-Fermi blazars, there are significant correlations between jet power and the accretion rate (traced by the broad-emission-lines luminosity), between jet power and black hole mass; for Fermi blazars, the black hole mass does not have significant influence on jet power while for non-Fermi blazars, both accretion rate and black hole mass have contributions to the jet power. Our results support the "blazar sequence" and show that synchrotron peak frequency ($ν_{\rm peak}$) is associated with accretion rate but not with black hole mass.

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。

↑