Testing Accretion Scenarios at the Eddington Limit

Details Testing Accretion Scenarios at the Eddington Limit Testing Accretion Scenarios at the Eddington Limit

Sep 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004cxo..prop.1663b&link_type=abstract

Chandra Proposal ID #06300908

Computer Science

Chandra Proposal Id #06300908

Scientific paper

We propose to obtain five 25 ksec HRC-S+LETG observations of the transient supersoft X-ray binary RX J0513.3-6951 distributed over a complete ~40 day long X-ray on state. This data will for the first time provide a spectral resolution adequate for a detailed LTE and non-LTE modelling of the hot stellar atmosphere, and will unequivocally reveal the nature of the accreting compact object. The expected spectral changes during the exponential decline phase of the soft X-ray flux will allow us to accurately determine the temporal variation of the radius and effective temperature of the stellar photosphere. The observations are a viable test of different scenarios proposed for the response of compact binaries to accretion rates close to the Eddington critical limit and their long-term evolution.

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