The High-Mass X-ray Binaries V0332+53, 4U0115+63, and A0535+262 in Quiescence

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White Dwarf Binaries, Neutron Star Binaries, Cataclysmic Variables, Ulxs, Black Holes, V0332+53, Xmm-Newton Proposal 05061901

Scientific paper

The propeller effect should cut off accretion in fast-spinning neutron star high-mass X-ray binaries at low mass transfer rates. Accretion seems to be continuing in some HMXBs observed at Lx < 1e34 ergs/s, as evidenced by continuing pulsations. However, indications of spectral softening in systems in the propeller regime suggest that some high-mass X-ray binaries are undergoing fundamental changes in their accretion regime. We propose to use XMM to measure the minimum Lx in three quiescent systems known to be in the propeller regime, look for pulsations in deep quiescence, and study their spectral shape, particularly looking for blackbody components from the poles or complete neutron star surface.

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