Classifying the compact object in the unusual X-ray binary CI Cam

Details Classifying the compact object in the unusual X-ray binary CI Cam Classifying the compact object in the unusual X-ray binary CI Cam

Oct 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010xmm..prop...82n&link_type=abstract

XMM-Newton Proposal ID #06720501

Physics

White Dwarf Binaries, Neutron Star Binaries, Cataclysmic Variables, Ulxs, Black Holes, Ci Cam

Scientific paper

CI Cam is a unique X-ray binary that represents either a potential new evolutionary pathway towards type Ia supernovae (if it is a white dwarf), or an ideal object to study accretion disk geometry at a regime where an advection dominated flow is expected (if it is a black hole or neutron star). However, existing data cannot discriminate between these possibilities. We propose a 120 ks observation of CI Cam with the primary objective of identifying the nature of the compact object. We will do this by 1) resolving the 6.7 He-like and 6.97 H-like Fe lines, if present 2) investigating the origin of the brightness fluctuations in the system and 3) obtaining the deepest observation yet of the faint soft component in order to constrain appropriate physical models.

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