Quiescent Emission from Transient Type i X-Ray Bursters

Details Quiescent Emission from Transient Type i X-Ray Bursters Quiescent Emission from Transient Type i X-Ray Bursters

Sep 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999cxo..prop..180b&link_type=abstract

Chandra Proposal ID #01400884

Physics

Chandra Proposal Id #01400884

Scientific paper

Transient type-I X-ray bursters have been previously detected during ``quiescence'', at fluxes much lower than when in outburst. We propose ACIS-S-BI spectroscopy of six such transients in quiescence, to discover whether their luminosity is due to the delayed escape of energy deposited in the crust during the outburst or to low-level advection-dominated accretion. If accretion is active, we will observe X-ray spectra with a detectable red-shifted oxygen photo-ionization edge. If accretion is not active, then the faint emission is due only to a hot crust, and we expect spectra which are consistent with a pure hydrogen atmosphere, and no rapid variability. In both cases, we will measure the neutron star surface area (normalized by distance) by utilizing realistic emergent spectra.

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