The UV Brightness of Quiescent Black Holes and Neutron Stars

Details The UV Brightness of Quiescent Black Holes and Neutron Stars The UV Brightness of Quiescent Black Holes and Neutron Stars

Jun 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...208.7203h&link_type=abstract

American Astronomical Society Meeting 208, #72.03

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Scientific paper

HST/STIS observations of quiescent black hole and neutron star soft X-ray transients have suggested that the two may exhibit dramatically different ultraviolet spectra, with neutron stars being more UV bright. We describe new HST/ACS observations providing near-UV detections of another neutron star system, Aql X-1, and three more black hole systems, X-ray Nova Mus 1991, GRO J0422+32, and X-ray Nova Vel 1993, together with upper limits for the neutron star system XTE J2123-058. These more than double the sample available. We will discuss models for the spectral energy distributions of quiescent soft X-ray transients, and the evidence that they are systematically different in the light of this larger and more significant sample.This work was supported by a grant from the Space Telescope Science Institute.

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