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Accretion disk and stream origin of the dip phenomenon in Hercules X-1

Published online by Cambridge University Press:  21 February 2013

D. A. Leahy  and
C. D. Igna
D. A. Leahy
Affiliation:
Department of Physics and Astronomy, University of Calgary, Calgary, Alberta, T2N 1N4, Canada email: leahy@ucalgary.ca
C. D. Igna
Affiliation:
Dept. of Astronomy, University, add USA email: zz@asxxxe
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Abstract

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The Rossi X-ray Timing Explorer has observed Hercules X-1 over a period of about 13 years, allowing detailed measurement of the properties of the dip phenomenon. We construct a model for the dips based on the impact between the accretion stream and the disk, including the geometry and dynamics of the stream and disk. We also consider the case where the stream penetrates the outer parts of the disk, where its density is low, and proceeds to a second impact at smaller radius in the disk. The results from the model are discussed and compared to the observed properties of the dips.

Keywords

Accretionaccretion disksX-rays: binariesstars: neutron
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 8 , Symposium S290: Feeding Compact Objects: Accretion on All Scales , August 2012 , pp. 125 - 128
Copyright
Copyright © International Astronomical Union 2013

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