Phase resolved O VI variations in the High Mass X-ray Binary SMC X-1/Sk160

Details Phase resolved O VI variations in the High Mass X-ray Binary SMC X-1/Sk160 Phase resolved O VI variations in the High Mass X-ray Binary SMC X-1/Sk160

Dec 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003aas...203.8404i&link_type=abstract

American Astronomical Society Meeting 203, #84.04; Bulletin of the American Astronomical Society, Vol. 35, p.1341

Astronomy and Astrophysics

Astronomy

2

Scientific paper

The high-mass eclipsing X-ray binary system SMC X-1/Sk 160 was observed for almost one complete orbit (3.892 days) with the Far Ultraviolet Spectroscopic Explorer (FUSE) on 19-23 July 2003. The X-ray pulsar with a pulse period of P=0.71 sec is eclipsed by the supergiant, a B0 Ib for ˜ 0.6 day. Spectra covering 905-1180 Å with a spectral resolution of ˜ 0.05 Å were obtained for a total of 148 ksec covering orbital phases from 0.20, through conjunction of the pulsar (phase 0.5), ending at phase 0.06, near the end of the X-ray source eclipse. We present an initial analysis of the significant changes in the O VI 1032-1038 absorption formed in the stellar wind of the B0 I primary as a function of orbital phase.
The O VI doublet is a coronal line that samples gas near ˜ 3 x 105 K, assuming collisional equilibrium, but is expected to be present under photoionization conditions up to ˜ 106 K, when the X-ray source ionizes the wind around most of the orbit as is the case in SMC X-1. O VI is especially critical since it is the highest ionization stage (O V I.P.=114 eV) of any strong resonance line longward of the Lyman limit, and consequently is the best diagnostic for studying the kinematics of the highly ionized gas in the SMC X-1 system. The O VI variations are compared with those of N V 1238-1242 Å and C IV 1548-1550 Å from archival HST and IUE spectra.
R.C. Iping acknoledges support of NASA grant NAG5-11137 to Catholic University of America.

Affiliated with

Also associated with

No associations

Rating

Phase resolved O VI variations in the High Mass X-ray Binary SMC X-1/Sk160 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Phase resolved O VI variations in the High Mass X-ray Binary SMC X-1/Sk160, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Phase resolved O VI variations in the High Mass X-ray Binary SMC X-1/Sk160 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1421631