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 1903.04835astro-ph.HEhep-ph
收藏

用XMM-Newton测量的三个Seyfert Galerkin的日内变率

Intra-day variability of three Seyfert Galaxies measured with XMM-Newton

Ashutosh Tripathi, Paul J. Wiita, Alok C. Gupta, Minfeng Gu, M. Liao

摘要:

我们提出并分析了三个塞弗特星系在一天内的时间尺度上的变化。我们以统一的方式分析了XMM-牛顿在2000年至2015年期间对NGC 4051,MCG $-06-30-15$和NGC 4151进行的38次最长($>30$ ks)观测。在基本上所有这些观测中,原子核都相当活跃,总体X射线通量(0.3-10 keV)变化了一个数量级。大多数观测确实显示出特征时间尺度,通过其自关联函数估计,范围在$\sim 2.9$ ks和$\sim 45.3$ ks之间。硬(2-10千电子伏)和软(0.3-02千电子伏)带是非常好的相关性,但考虑到他们的硬度比显示,源通常软化耀斑期间。我们还提供了新的估计,这三个活动星系核的中心黑洞的质量支持的假设,窄线塞弗特1星系有相对较小的中央黑洞。

英文摘要:

We present and analyze the variability of three Seyfert galaxies on intra-day timescales. We have analyzed in a uniform manner the 38 longest ( $>30$ ks) observations made for NGC 4051, MCG$-06-30-15$ and NGC 4151 by XMM-Newton between 2000 and 2015. The nuclei were quite active during essentially all of these observations and the overall X-ray fluxes (0.3-10 keV) varied by an order of magnitude. Most of the observations do appear to show characteristic timescales, estimated through their auto-correlation functions, ranging between $\sim 2.9$ ks and $\sim 45.3$ ks. The hard (2-10 keV) and soft (0.3-02 keV) bands are very well correlated but consideration of their hardness ratios show that the sources typically soften during flares. We also provide new estimates of the central black hole masses for these three AGN that support the hypothesis that Narrow Line Seyfert 1 galaxies have relatively small central black holes.

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。

↑