X-Ray Transmission Spectroscopy during the Star-Rise of HER X-1

Details X-Ray Transmission Spectroscopy during the Star-Rise of HER X-1 X-Ray Transmission Spectroscopy during the Star-Rise of HER X-1

Sep 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002cxo..prop.1188j&link_type=abstract

Chandra Proposal ID #04400982

Computer Science

Chandra Proposal Id #04400982

Scientific paper

We propose to observe Her X-1 at the time in which the neutron star rises above the edge of the accretion disk. This phenomenon is due to disk precession. The enhanced line-of-sight optical depth from the disk atmosphere and corona will allow the detection of absorption edges and/or resonance lines, from species such as N VII, O VIII, Ne X, Mg XII, SI XIV, and Fe XXV, which we can use to determine the disk ionization structure, the elemental composition, the gas dynamics, and column density. The pre-rise and post-rise epochs likely exhibit line features from the disk and corona, and are best to search for P Cygni profiles from an equatorial disk-wind.

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