Wind accretion in HMXRB

Details Wind accretion in HMXRB Wind accretion in HMXRB

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aipc..599..698k&link_type=abstract

X-RAY ASTRONOMY: Stellar Endpoints,AGN, and the Diffuse X-ray Background. Edited by Nicholas E. White, Giuseppe Malaguti, and G

Astronomy and Astrophysics

Astronomy

X-Ray Binaries, Eclipsing Binaries, X-Ray Sources, X-Ray Bursts

Scientific paper

We present light curves and spectra of a ~35 ksec RXTE observation of Vela X-1 and a ~300 ksec observation of Cen X-3. Both light curves show strong absorption which increases from no absorption at low orbital phases to large values at high orbital phases; in the case of Vela X-1 by a factor of almost 100. Superimposed are absorption dips which can be observed at any orbital phase, though mostly at high orbital phases. We study an unusually strong dip in Vela X-1 during which the flux is reduced by ~90% and almost no pulses are detectable. The increase of NH and the scattered component show the in- and egress of material in the line of sight. A similar behavior is observed in a pre-eclipse dip in Cen X-3. .

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