Direct Observation of Circumstellar Clumps in High Mass X-Ray Binaries

Details Direct Observation of Circumstellar Clumps in High Mass X-Ray Binaries Direct Observation of Circumstellar Clumps in High Mass X-Ray Binaries

Apr 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009sptz.prop60055s&link_type=abstract

Spitzer Proposal ID #60055

Physics

Scientific paper

The direct observation of clumpy circumstellar material in high mass X-ray binaries (HMXBs) is proposed. We propose to observe the two HMXBs V420 Aur and LS 5039, based on our optical data obtained over the past four years. With precision time- series photometry from the post-cryo IRAC instrument we expect the following scientific return: (i) Characterization of the size and distribution of circumstellar clumpy material as derived from modeling the light curve variations produced as the clumps disappear behind the star. (ii) Characterization of the temperature of the clumps as inferred from the 3.6 - 4.5 micrometer color of the clumps disappearing behing the primary star. (iii) Serendipitous observation of clumpy accretion events produced as clumps heat up on their way to accretion on the neutron star or black hole.

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