A UV Survey of Quiescent Black Holes and Neutron Stars

Details A UV Survey of Quiescent Black Holes and Neutron Stars A UV Survey of Quiescent Black Holes and Neutron Stars

Jul 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004hst..prop10253h&link_type=abstract

HST Proposal ID #10253

Physics

Hst Proposal Id #10253 Hot Stars

Scientific paper

Existing STIS observations of quiescent Galactic black hole and neutron star binaries suggest a striking difference between them. The spectra of black holes appear to drop off steeply in the near-UV, whereas those of neutron stars continue to rise, at least down to 1700A. This difference has been interpreted in terms of advective accretion models, and may indicate a fundamental signature of the two types of object. The existing data do not include enough objects to form a representative sample, however. We will exploit the faint source sensitivity of ACS to perform a survey of the UV spectral shapes across a larger sample containing both black holes and neutron stars. This survey will test the assertion that their UV spectra are strikingly different; allow modelling of the broad band spectral energy distribution; test for variability in the UV flux; and identify suitable targets for subsequent spectroscopic follow-up..

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