[en] We have obtained 500 ks of Chandra HETG observations of the massive binary delta Ori (O9.5II+unseen companion), one of the fundamental calibrators of the mass-luminosity-radius relation in the upper HR diagram. The program is intended to map the emission line parameters as the secondary moves through the wind of the primary star. Custom extraction techniques have been developed to create 12 time-resolved 40 ks spectra from these observations, each of which is properly calibrated for time and temperature effects. Emission line fluxes for these time slice spectra are presented, as well as phase analysis of the variability of the fluxes. We discuss the interpretation of the resulting data, such as colliding winds and occultation of various temperature regimes of the primary wind by the secondary.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Nichols, Joy S.; Harvard-Smithsonian, CfA
Nazé, Yaël ; Université de Liège - ULiège > GAPHE : Astrophysique observationnelle (sol et espace)
Corcoran, M. F.; USRA CRESST
Pollock, A.; ESA XMM-Newton SOC, Spain
Moffat, A. F.; Universite de Montreal, Canada
Ignace, R.; East Tennessee State University
Waldron, W. L.; Eureka Scientific, Inc
Evans, N. R.; Harvard-Smithsonian, CfA)
Language :
English
Title :
Time-Resolved X-ray Spectroscopy of the Massive Binary delta Ori
