Validating Neutron Star Radius Measurements

Details Validating Neutron Star Radius Measurements Validating Neutron Star Radius Measurements

Sep 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008cxo..prop.2575c&link_type=abstract

Chandra proposal ID #10400588

Physics

Scientific paper

Spectral analysis of non radius-expansion X-ray bursts and transient neutron star in quiescence were both used to estimate the NSs radii for different sources. The validities of the methods need to be verified by performing the radius measurements on the same source with different methods respectively. Transient type-I X-ray bursters are excellent candidates for testing the consistency between the methods, since they were detected in both bursts and quiescence. Out of 3 candidates: Cen X-4, Aql X-1 and 4U 1608-52, 4U 1608-52 turns out to be the best one due to the lack of archival RXTE burst data for Cen X-4 and the previous reported significant luminosity and temperature variability for Aql X-1 in quiescence. Therefore, we propose a 20 ks Chandra/ACIS-S observation of 4U 1608-52.

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