1. The X-rays wind connection in PG 2112+059.
- Author
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Saez, C, Brandt, W N, Bauer, F E, Chartas, G, Misawa, T, Hamann, F, and Gallagher, S C
- Subjects
X-rays ,SOFT X rays ,HARD X-rays ,ACTIVE galaxies ,QUASARS - Abstract
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 (|${\lesssim}2 \, \text{keV}$|), consistent with increased absorption. Variations in the hard X-ray emission (|${\gtrsim}2\, \text{keV}$|) 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. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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