The X-rays wind connection in PG?2112+059
The X-rays wind connection in PG?2112+059
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PG中的X射线风连接？2112 059
DOI：
10.1093/mnras/stab1706
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发表时间：
2021
影响因子：
4.8
通讯作者：
Gallagher S C
中科院分区：
文献类型：
--
作者：
Saez C;Brandt W N;Bauer F E;Chartas G;Misawa T;Hamann F;Gallagher S C
通过比较钱德拉- acis数据和同期UVHST/STIS光谱，我们研究了高x射线可变类星体PG 2112+059中宽吸收线（BAL）风的x射线和紫外（UV）特性之间的联系。我们观察到一种相关性，即等效宽度（EWs）的增加伴随着更红的紫外光谱。BAL EWs的增长还伴随着软x射线发射的显着变暗（），与吸收增加相一致。硬x射线发射（）的变化仅伴随UV-BALs的微小光谱变化，并且没有显示出BALs EW的显著变化。这些趋势表明了一种风挡情景，即相对于视线的流出倾斜度正在减小和/或风质量正在增加。这些变化提高了BALs的覆盖分数和/或柱密度，并且可能几乎同时伴随着盾构柱密度的增加。
We study the connection between the X-ray and ultraviolet (UV) properties of the broad absorption line (BAL) wind in the highly X-ray variable quasar PG 2112+059 by comparingChandra-ACIS data with contemporaneous UVHST/STIS spectra in three different epochs. We observe a correlation whereby an increase in the equivalent widths (EWs) of the BALs is accompanied by a redder UV spectrum. The growth in the BAL EWs is also accompanied by a significant dimming in soft X-ray emission (), consistent with increased absorption. Variations in the hard X-ray emission () are only accompanied by minor spectral variations of the UV-BALs and do not show significant changes in the EW of BALs. These trends suggest a wind-shield scenario where the outflow inclination with respect to the line of sight is decreasing and/or the wind mass is increasing. These changes elevate the covering fraction and/or column densities of the BALs and are likely accompanied by a nearly contemporaneous increase in the column density of the shield.