论文标题
局部吸收器与3C 273的离子组成
The ionic composition of the local absorber towards 3C 273
论文作者
论文摘要
通过光谱吸收特征，在我们银河系的局部附近观察到热离子气体。最常见的假设是，这种气体在碰撞电离平衡中形成了围绕我们的乳状（MW）的光环。在本文中，我们研究了这种热和电离的局部气体的元素丰度。我们使用Bright Blazar 3C 273的2.4 ms堆叠X射线光谱，并探测局部吸收特征。使用X射线吸收系的离子拟合，我们得出了每个电离物种的柱密度。基于色谱柱密度，我们重建了吸收测量分布（AMD），即氢柱密度随温度的函数。我们报告了相对于太阳O的C，N，NE和FE的元素丰度。先前对局部X射线发射线的测量与当前的列密度结合使用，表明$ 1-80 $ KPC的比例高度为$ 1-80 $ kpc，氢数密度和$ 10^{ - 4} { - 4} -10^{ - 3} $ CM $ CM $ CM $ CM $^{-3}此外，我们检测到类似于6400 $ \ pm $ 1500 km S $^{ - 1} $的速度的类似o线。
Hot ionized gas is observed in the local vicinity of our galaxy through spectral absorption features. The most common hypothesis is that this gas forms a halo surrounding our Milky-Way (MW), in collisional ionization equilibrium. In this paper we investigate the elemental abundance of this hot and ionized local gas. We use a 2.4 Ms stacked X-ray spectrum of the bright blazar 3C 273 and probe the local absorption features. Using ion-by-ion fitting of the X-ray absorption lines we derive the column density of each ionization species. Based on the column densities we reconstruct the Absorption measure distribution (AMD), namely the hydrogenic column density as a function of temperature. We report the elemental abundances of C, N, Ne, and Fe relative to solar O. Previous measurements of local X-ray emission lines in conjunction with the present column densities indicate a scale height of $1-80$ kpc and hydrogen number density of $10^{-4}-10^{-3}$cm$^{-3}$ for the hot ionized gas. Additionally, we detect He-like O lines from the quasar broad line region with velocities of 6400$\pm$1500 km s$^{-1}$
