CIR modulation of the X-ray flux from the O7.5 III(n)((f)) star ξ Persei?

Download
  1. Get@NRC: CIR modulation of the X-ray flux from the O7.5 III(n)((f)) star ξ Persei? (Opens in a new window)
DOIResolve DOI: http://doi.org/10.1093/mnras/stu565
AuthorSearch for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for:
TypeArticle
Journal titleMonthly Notices of the Royal Astronomical Society
ISSN0035-8711
Volume441
Issue3
Pages21732180; # of pages: 8
AbstractWe analyse a 162 ks high energy transmission grating Chandra observation of the O7.5 III(n)((f)) star ξ Per, together with contemporaneous Hα observations. The X-ray spectrum of this star is similar to other single O stars, and not pathological in any way. Its UV wind lines are known to display cyclical time variability, with a period of 2.086 d, which is thought to be associated with corotating interaction regions (CIRs). We examine the Chandra and Hα data for variability on this time-scale. We find that the X-rays vary by ~15 per cent over the course of the observations and that this variability is out of phase with variable absorption on the blue wing of the Hα profiles (assumed to be a surrogate for the UV absorption associated with CIRs). While not conclusive, both sets of data are consistent with models where the CIRs are either a source of X-rays or modulate them.
Publication date
PublisherOxford University Press
LanguageEnglish
AffiliationNational Research Council Canada; National Science Infrastructure
Peer reviewedYes
NPARC number21272820
Export citationExport as RIS
Report a correctionReport a correction
Record identifier4996bc29-edc8-4d58-8772-8dde8e816f7d
Record created2014-12-03
Record modified2016-05-09
Bookmark and share
  • Share this page with Facebook (Opens in a new window)
  • Share this page with Twitter (Opens in a new window)
  • Share this page with Google+ (Opens in a new window)
  • Share this page with Delicious (Opens in a new window)