[en] We report preliminary results from variability analysis of delta Ori in Chandra high-resolution X-ray spectroscopy and concurrent MOST high-precision optical photometry. With nearly complete phase coverage of the 5-day eclipsing binary orbit, it is possible to measure directly radial velocity and flux variations as a function of phase, leading to a mapping of the stellar wind distribution for the massive primary star. The phase dependence of the X-ray overall intensity and the comparative behavior of the emission lines are also presented.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Nichols, Joy; Harvard-Smithsonian Center for Astrophysics
Nazé, Yaël ; Université de Liège - ULiège > Groupe d'astrophysique des hautes énergies (GAPHE)
Moffatt, Anthony F. J.; Universite de Montreal ; Centre de Recherche en Astrophysique du Quebec
Corcoran, Michael; CRESST and X-Ray Astrophysics Laboratory/Universities Space Research Association
Richardson, Noel; Universite de Montreal ; Centre de Recherche en Astrophysique du Quebec
Williams, S.; National Observatory of Athens
Pollock, A. M. T.; European Space Agency XMM-Newton Science Operations Centre, Madrid Spain
Ignace, Richard; Smithsonian Center for Astrophysics
Hole, T.; Weber State University
Waldron, W.; Eureka Scientific, Inc.
Evans, Nancy Remage; Harvard-Smithsonian Center for Astrophysics)
MOST Collaboration
Language :
English
Title :
Delta Ori Phase-Dependent Variability from Chandra and MOST Campaign
Publication date :
01 June 2013
Event name :
Massive Stars: From α to Ω, held 10-14 June 2013 in Rhodes, Greece
