Bowen Fluorescence from Companion Stars in X-ray Binaries

Details Bowen Fluorescence from Companion Stars in X-ray Binaries Bowen Fluorescence from Companion Stars in X-ray Binaries

2004-02-04

arxiv.org/abs/astro-ph/0402093v1

Astronomy and Astrophysics

Astrophysics

3 pages, 3 figures, to appear in RevMexAA(SC) Conference Series, Proc. of IAU Colloquium 194 "Compact binaries in the Galaxy a

Scientific paper

This paper will review a new technique of detecting companion stars in LMXBs and X-ray transients in outburst using the Bowen fluorescence lines at 4634-4640 Angs. These lines are very efficiently reprocessed in the atmospheres of the companion stars, and thereby provide estimates of the K2 velocities and mass functions. The method has been applied to Sco X-1, X1822-371 and GX339-4 which, in the latter case, provides the first dynamical evidence for the presence of an accreting black hole. Preliminary results from a VLT campaign on V801 Ara, V926 Sco and XTE J1814-338 are also presented.

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