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Analysis of spectrum variations in Hercules X-1

Published online by Cambridge University Press:  30 December 2019

Denis Leahy Open the ORCID record for Denis Leahy [Opens in a new window]
Denis Leahy*
Affiliation:
Dept. of Physics & Astronomy, University of Calgary, Calgary, Canada email: [email protected]
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Abstract

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. Hercules X-1 (Her X-1) was observed extensively by the Rossi X-ray Timing Explorer (RXTE) over its 17 year lifetime. Here, the archival RXTE/PCA observations of Her X-1 are analyzed with emphasis on the 35-day cycle dependence. Spectral fits are carried out and the 35-day phase dependences are characterized. The regular behaviours of the changes are interpreted in terms of the precessing accretion disk. We find that the most important variation is caused by the changing illumination of the inner edge of the disk, but other variations with different causes are also seen.

Keywords

X-rays: binariesaccretionaccretion disksstars: neutron
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 14 , Symposium S346: High-mass X-ray Binaries: Illuminating the Passage from Massive Binaries to Merging Compact Objects , August 2018 , pp. 235 - 238
Copyright
© International Astronomical Union 2019 

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