The strength and width of Fe Kα lines in Seyferts and their correlations with the X-ray slope
The strength and width of Fe Kα lines in Seyferts and their correlations with the X-ray slope
复制标题
Seyferts中Fe Kα线的强度和宽度及其与X射线斜率的相关性
DOI：
10.1046/j.1365-8711.2001.04481.x
复制
发表时间：
2000
影响因子：
4.8
通讯作者：
Warsaw Uniwersity
中科院分区：
文献类型：
--
作者：
P. Lubiński;A. K. N. C. A. Center;Warsaw;Poland;Heavy Ion Laboratory;Warsaw Uniwersity
我们研究了用ASCA观测到的大样本Seyfert 1的Fe K线的性质。拟合幂律和高斯线产生的平均线宽和等效宽度分别为0.22±0.03 keV和0.13±0.01 keV。因此，典型的线是弱的和窄的。然后我们得到了所有光谱的平均谱线轮廓，发现它由一个窄的核心和蓝、红翼组成，其中红翼比MCG −6-30-15弱得多。我们得到三个平均光谱的塞弗茨分组根据硬度，并发现在所有三种情况下的核心（起源于一个远程介质）的等效宽度为150 eV。机翼很好地安装了一个广泛的线从一个磁盘与强大的相对论效应。它的等效宽度与斜率相关，从最硬光谱的1.70 eV增加到最软光谱的1.120 eV。内圆盘半径从0.40减小到0.10，拟合圆盘倾角为0.45 °。宽Fe K线的斜率和强度之间获得的相关性被认为是与以前发现的斜率和康普顿反射的相关性一致。
We study properties of Fe K lines of a large sample of Seyfert 1s observed by ASCA. Fits with power laws and Gaussian lines yield the average linewidth and equivalent width of 0.22±0.03 keV and 0.13±0.01 keV, respectively. Thus, the typical lines are weak and narrow. We then obtain the average line profile of all our spectra, and find it to consist of a narrow core and blue and red wings, with the red wing being much weaker than that of e.g. MCG −6-30-15. We obtain three average spectra of Seyferts grouped according to the hardness, and find the equivalent width of the core (originating in a remote medium) to be ≃50 eV in all three cases. The wings are well fitted by a broad line from a disc with strong relativistic effects. Its equivalent width correlates with the slope, increasing from ∼70 eV for the hardest spectrum to ∼120 eV for the softest one. The inner disc radius decreases correspondingly from ∼40 to ∼10 gravitational radii, and the fitted disc inclination is ∼45°. The obtained correlation between the slope and the strength of the broad Fe K line is found to be consistent with the previously found correlation of the slope and Compton reflection.