Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006astl...32..804k&link_type=abstract
Astronomy Letters, Volume 32, Issue 12, pp.804-815
Astronomy and Astrophysics
Astronomy
8
Scientific paper
We analyze and interpret the RXTE/ASM X-ray light curves for the close binary system Her X-1/HZ Her obtained from February 1996 to September 2004. Some of the features found previously in the averaged X-ray light curves are confirmed by the new RXTE/ASM data. In particular, the anomalous dips and post-eclipse recoveries in two successive orbits in the short-on state are clearly distinguishable and are stable features of the X-ray light curves. We argue that to account for these features, the tilt of the accretion disk to the orbital plane must be assumed to change with phase of the 35-day period. We present a numerical model that can reproduce the observed features of the light curves.
Ketsaris N. A.
Klochkov D. K.
Postnov Konstantin A.
Shakura Nikolai I.
Staubert Rüdiger
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