Constraining the shielded wind scenario in PG 2112+059

C. Saez, William Nielsen Brandt, F. E. Bauer, F. Hamann, G. Chartas, S. C. Gallagher

Research output: Contribution to journalArticle

Abstract

The physical scenario describing the origin of quasar winds remains largely unsettled due to our failure to account for X-ray weak BAL quasars. We approach this problem by studying the relation between the inner part of the outflow which is likely to be shielding the X-ray emission and the UV winds characterized by broad absorption lines (BALs). In particular, we aim to probe the wind-shield connection in the highly X-ray variable BAL quasar PG 2112+059, which has exhibited periods of X-ray weakness and X-ray normality in the past. A set of two 20 ks Chandra observations and two contemporaneous HST observations, separated by at least eight months, combined with a nearly simultaneous archival Chandra -HST observation from 2002, afford us a unique opportunity to study the connection between the shield (which is thought to be responsible for the X-ray absorption) and the ionization state of the wind (observed as UV BAL features; e.g., Civ and Ovi lines) over various timescales. In this review, which was based on a presentation in the XMM-Newton 2015 Science Workshop, we provide background relevant to our study and briefly analyze a recent Chandra observation of our new set of multiwavelength observations of PG 2112+059.

Original languageEnglish (US)
Pages (from-to)541-545
Number of pages5
JournalAstronomische Nachrichten
Volume337
Issue number4-5
DOIs
StatePublished - May 1 2016

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quasars
x rays
shield
normality
XMM-Newton telescope
newton
shielding
ionization
outflow
probe
timescale
probes
science

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Saez, C., Brandt, W. N., Bauer, F. E., Hamann, F., Chartas, G., & Gallagher, S. C. (2016). Constraining the shielded wind scenario in PG 2112+059. Astronomische Nachrichten, 337(4-5), 541-545. https://doi.org/10.1002/asna.201612344
Saez, C. ; Brandt, William Nielsen ; Bauer, F. E. ; Hamann, F. ; Chartas, G. ; Gallagher, S. C. / Constraining the shielded wind scenario in PG 2112+059. In: Astronomische Nachrichten. 2016 ; Vol. 337, No. 4-5. pp. 541-545.
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Saez, C, Brandt, WN, Bauer, FE, Hamann, F, Chartas, G & Gallagher, SC 2016, 'Constraining the shielded wind scenario in PG 2112+059', Astronomische Nachrichten, vol. 337, no. 4-5, pp. 541-545. https://doi.org/10.1002/asna.201612344

Constraining the shielded wind scenario in PG 2112+059. / Saez, C.; Brandt, William Nielsen; Bauer, F. E.; Hamann, F.; Chartas, G.; Gallagher, S. C.

In: Astronomische Nachrichten, Vol. 337, No. 4-5, 01.05.2016, p. 541-545.

Research output: Contribution to journalArticle

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Saez C, Brandt WN, Bauer FE, Hamann F, Chartas G, Gallagher SC. Constraining the shielded wind scenario in PG 2112+059. Astronomische Nachrichten. 2016 May 1;337(4-5):541-545. https://doi.org/10.1002/asna.201612344