.png){kind=icon}
返回
The X-rays wind connection in PG 2112+059
.png){kind=icon}
OA
AI
DOI：10.1093/mnras/stab1706.png)
.png){kind=icon}
原文求助.png){kind=icon}
分享.png){kind=icon}
收藏
摘要
En 中文
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 comparing Chandra-ACIS data with contemporaneous UV HST/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 (less than or similar to 2keV), consistent with increased absorption. Variations in the hard X-ray emission (less than or similar to 2 keV) are only accompanied by minor spectral variations of the UV-BALs and do not show significant changes in the EWof 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.
Keyword:
techniques: spectroscopic
galaxies: active
galaxies: individual: PG 2112+059
quasars: absorption lines
X-rays: galaxies
期刊
IF:
4.8
论文数:
7.1W
被引数:
25.0W
机构
引用论文
Upper Campanian–Maastrichtian nannofossil biostratigraphy and high-resolution carbon-isotope stratigraphy of the Danish Basin: Towards a standard δ13C curve for the Boreal Realm丹麦盆地的上坎帕尼亚-马斯特里赫特纳化石生物地层学和高分辨率碳同位素地层学: 走向北方领域的标准 δ13C曲线
.png){kind=icon}
PREAI
分享收藏
What determines the depth of broad absorption lines? Keck hires observations of BALQSO 1603+3002OAAI
OAAI分享收藏
查看更多内容