Faint quiescent neutron star soft X-ray transients

Details Faint quiescent neutron star soft X-ray transients Faint quiescent neutron star soft X-ray transients

Sep 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004cxo..prop.1666j&link_type=abstract

Chandra Proposal ID #06400097

Physics

Chandra Proposal Id #06400097

Scientific paper

We propose to obtain a 20 ksec ACIS-S observation of 1H1715-321 and a 25 ksec of 1H1905+000. Because of non--detections during very short previous Chandra observations, both sources have to have a low quiescent luminosity. They also have a low N_H and a well-known source distance. Finally, the source position is known accurately enough to circumvent source confusion. These observations will reduce the gap in the derived quiescent luminosities between neutron star and BH SXTs which is used as being evidence for a BH event horizon. Furthermore, a low-luminosity neutron star means a relatively cold, and therefore likely, massive neutron star. The masses of neutron stars provide important constraints on the EoS of ultra-dense matter. This is one of the ultimate goals of neutron star studies.

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