Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aps..aprs11007w&link_type=abstract
American Physical Society, April Meeting, Jointly Sponsored with the High Energy Astrophysics Division (HEAD) of the American As
Astronomy and Astrophysics
Astrophysics
Scientific paper
We will present Chandra and XMM-Newton observations of several neutron star X-ray transients in their quiescent state, including KS 1731-260, MXB 1659-298, the transient in Terzan 1, and the "bursting pulsar" GRO J1744-28. The quiescent emission mechanisms for neutron stars, and models used to describe their spectra, are presently being debated intensely. If the quiescent emission of these neutron star systems is due to the cooling of the neutron star, our results indicate that these sources have either been quiescent for several hundreds of years, or that enhanced neutrino cooling occurs in their neutron star cores. In the former case, the population of quiescent neutron star binaries present in the galaxy may be much larger than previously thought. In the latter case, neutrino cooling may provide a means of estimating the properties of neutron star matter. This work was supported by NASA through the Chandra Postdoctoral Fellowship grant number PF9-10010 awarded by CXC, which is operated by the Smithsonian Astrophysical Observatory for NASA under contract NAS8-39073.
Miller Jon
Wijnands Rudy
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