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arXiv 2408.02734astro-ph.HEastro-ph.GA
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本地星际介质中的氩X射线吸收

Argon X-ray absorption in the local ISM

E. Gatuzz, T. W. Gorczyca, M. F. Hasoglu, J. A. García, T. R. Kallman

AI总结:

首次利用33个低质量X射线双星的高分辨率Chandra光谱分析氩K边吸收区,计算了Ar各电离态的新光吸收截面并估计柱密度,发现其分布与距离及银河坐标无显著相关性。

摘要:

我们利用33个低质量X射线双星的高分辨率HETGS Chandra光谱,首次对氩K边吸收区(3.1-4.2 Å)进行了全面分析。利用R-matrix理论,我们计算了Ar I--Ar XVI的新K光吸收截面。对于每个X射线源,我们估计了Ar I、Ar II、Ar III、Ar XVI、Ar XVII和Ar XVIII离子的柱密度,这些离子追踪了银河系气体星际介质的中性、温暖和热成分。我们检查了它们作为银河纬度、经度和源距离的函数的分布。然而,在距离、银河纬度或经度之间没有发现显著的相关性。未来的X射线观测台将使我们能够对原子数据进行基准测试,因为主要的共振线将被分辨。

英文摘要:

We present the first comprehensive analysis of the argon K-edge absorption region (3.1-4.2 Å) using high-resolution HETGS {\it Chandra} spectra of 33 low-mas X-ray binaries. Utilizing R-matrix theory, we computed new K photoabsorption cross-sections for {\rm Ar}~{\sc i}--{\rm Ar}~{\sc xvi} species. For each X-ray source, we estimated column densities for the {\rm Ar}~{\sc i}, {\rm Ar}~{\sc ii}, {\rm Ar}~{\sc iii}, {\rm Ar}~{\sc xvi}, {\rm Ar}~{\sc xvii} and {\rm Ar}~{\sc xviii} ions, which trace the neutral, warm and hot components of the gaseous Galactic interstellar medium. We examined their distribution as a function of Galactic latitude, longitude, and distances to the sources. However, no significant correlations were discerned among distances, Galactic latitude, or longitude. Future X-ray observatories will allow us to benchmark the atomic data as the main resonance lines will be resolved.

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