Measuring the Distance and Dust Distribution to Cen X-3 with X-Ray Halo Variability

Details Measuring the Distance and Dust Distribution to Cen X-3 with X-Ray Halo Variability Measuring the Distance and Dust Distribution to Cen X-3 with X-Ray Halo Variability

Sep 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006cxo..prop.2145t&link_type=abstract

Chandra Proposal ID #08400908

Computer Science

Chandra Proposal Id #08400908

Scientific paper

X-ray halos can provide information on interstellar grain properties (size, density, composition) and on the spatial distribution along the line of sight. Eclipsing X-ray binary systems, in particular, offer unique advantages, as the evolution of the halo following an abrupt eclipse is the easiest to model, and this variability can be used to measure the source distance. We propose to observe Cen X-3, beginning ~5 ks before eclipse egress and ending ~35 ks after eclipse egress. The X-ray halo variability will be used to determine the distance and dust distribution to Cen X-3, and will also probe the spatial relationship between gas and dust along the line of sight.

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