Spectroscopy of the Soft Component of the X-Ray Spectrum of HER X-1

Details Spectroscopy of the Soft Component of the X-Ray Spectrum of HER X-1 Spectroscopy of the Soft Component of the X-Ray Spectrum of HER X-1

Sep 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999cxo..prop..250p&link_type=abstract

Chandra Proposal ID #01400140

Computer Science

Chandra Proposal Id #01400140

Scientific paper

Her X-1 is a neutron star in a binary system, accreting matter from its stellar companion. The X-ray emission is modulated with the 1.24 s spin period of the neutron star, the 1.7 d orbital period and an additional 35 d cycle. The hard X-ray pulses of the neutron star irradiate plasma trapped in its magnetosphere, where they are partially absorbed and re-emitted at energies less than 1 keV. We propose to utilize the high spectral resolving power of the AXAF LETG for detailed phase-resolved spectral studies of the soft X-ray radiation during the 35 d on-state. The observation should start shortly before eclipse egress, when the X-rays of the neutron star are penetrating the atmosphere of the stellar companion, to get also information on its structure and ionisation stage.

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