Physics
Scientific paper
Sep 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008cxo..prop.2566c&link_type=abstract
Chandra proposal ID #10400329
Physics
Scientific paper
We propose a 60 ksec observation of the quasi-persistent neutron-star low-mass X-ray transient KS~1731-260 in quiescence. The long outbursts of this source heated the neutron star crust out of thermal equilibrium with the core. We have tracked the cooling of the neutron star crust in this object since it went into quiescence. Empirical fits to the data are not yet conclusive as to whether cooling has ceased or may continue. Furthermore, recent theoretical work motivated by our observations predict that the cooling may continue if the neutrino emissivity in the core is high. Our proposed observation will determine whether cooling has continued further constraining models for the neutron star crust and core, and will test whether residual accretion is important.
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