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 2005.08352astro-ph.HEastro-ph.COastro-ph.GA
收藏

窄线和宽线Seyfert 1星系X射线光子指数的比较

A comparison of X-ray photon indices among the narrow and broad-line Seyfert 1 galaxies

Vineet Ojha, Hum Chand, Gulab Chand Dewangan, Suvendu Rakshit

摘要:

我们提出了一个详细的比较系统的研究,使用221个窄线塞弗特1(NLSy 1)星系的样本相比,红移匹配的样本154个宽线塞弗特1(BLSy 1)星系的基础上使用ROSAT和/或XMM-牛顿望远镜在软X射线波段(0.1-2.0 keV)的观测。进行了均匀分析,以估计它们的软X射线光子指数($Γ^{s}_{X}$)和它与其他参数的核活动,如爱丁顿比(R $_\mathrm{Edd}$),辐射光度(L $_\mathrm{bol}$),黑洞质量(M $_\mathrm{BH}$)和宽分量的H $β$线的宽度(FWHM(H $β$))的相关性。在我们的分析中,我们发现了明确的证据,在NLSy 1和BLSy 1星系之间的$Γ^{s}_{X}$和R $_\mathrm{Edd}$分布的差异,与陡峭的$Γ^{s}_{X}$和更高的R $_\mathrm{Edd}$前者。这种差异也存在于硬X射线($Γ^{h}_{X}$)的光谱指数分布,根据分析的53个NLSy 1和46个BLSy 1星系在2-10 keV的能量带。即使对NLSy 1和BLSy 1星系的倾斜角差异进行平均校正后,R $_\mathrm{Edd}$分布的差异仍然存在。我们还估计了R $_\mathrm{Edd}$,基于SED拟合的34个NLSy 1和30个BLSy 1星系在0.3-10 keV的能带,发现结果仍然是一致的R $_\mathrm{Edd}$估计的基础上的光学测热光度。我们的分析表明,更高的R $_\mathrm{Edd}$在NLSy 1负责其陡峭的X射线光谱斜率相比,BLSy 1,一致的盘冠模型提出的发光活动星系核。

英文摘要:

We present a detailed comparative systematic study using a sample of 221 Narrow-line Seyfert 1 (NLSy1) galaxies in comparison to a redshift matched sample of 154 Broad-line Seyfert 1 (BLSy1) galaxies based on their observations using ROSAT and/or XMM-Newton telescopes in soft X-ray band (0.1-2.0 keV). A homogeneous analysis is carried out to estimate their soft X-ray photon indices ($Γ^{s}_{X}$) and its correlations with other parameters of nuclear activities such as Eddington ratios (R$_\mathrm{Edd}$), bolometric luminosities (L$_\mathrm{bol}$), black hole masses (M$_\mathrm{BH}$) and the widths of the broad component of H$β$ lines (FWHM(H$β$)). In our analysis, we found clear evidence of the difference in the $Γ^{s}_{X}$ and R$_\mathrm{Edd}$ distributions among NLSy1 and BLSy1 galaxies, with steeper $Γ^{s}_{X}$ and higher R$_\mathrm{Edd}$ for the former. Such a difference also exists in the spectral indices distribution in hard X-ray ($Γ^{h}_{X}$), based on the analysis of 53 NLSy1 and 46 BLSy1 galaxies in the 2-10 keV energy band. The difference in R$_\mathrm{Edd}$ distributions does exist even after applying the average correction for the difference in the inclination angle of NLSy1 and BLSy1 galaxies. We also estimated R$_\mathrm{Edd}$, based on SED fitting of 34 NLSy1 and 30 BLSy1 galaxies over the 0.3-10 keV energy band and found that results are still consistent with R$_\mathrm{Edd}$ estimates based on the optical bolometric luminosity. Our analysis suggests that the higher R$_\mathrm{Edd}$ in NLSy1 is responsible for its steeper X-ray spectral slope compared to the BLSy1, consistent with the disc-corona model as proposed for the luminous AGNs.

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。

↑