Spectral Signatures of a Precessing Accretion Disk in HER X-1

Details Spectral Signatures of a Precessing Accretion Disk in HER X-1 Spectral Signatures of a Precessing Accretion Disk in HER X-1

Sep 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001cxo..prop..825h&link_type=abstract

Chandra Proposal ID #03400921

Physics

Chandra Proposal Id #03400921

Scientific paper

Observations of Her X-1 with the XMM-Newton RGS show the most prominent line emission in the low-state of its 35-day flux cycle. Chandra HETG can detect a dozen H-like and He-like ion lines and test our photoionized disk atmosphere model, which has been successful in predicting the lines of EXO 0748-67 and 4U1822-37. The precessing disk hypothesis for Her X-1 can be tested by observing changes in velocity dispersion with the 35-day cycle, as the inner disk comes in and out of view. Her X-1 is one of the brightest low-mass X-ray binaries (LMXB) at high inclination, making it a prime target to observe line emission.

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