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MWC656: A Be+BH or a Be+sdO?
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MWC656 has been reported as classical Be star with a black hole companion. Revisited spectral variability properties render this unlikely, with a hot subdwarf more probable.
Forward citations
Cited by 3 Pith papers
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Why do massive stars form bow shocks? Bulk ISM motion as the main driver of bow shock formation and geometry
Bulk interstellar gas motion, not stellar motion, dominates most massive star bow shocks; only about 21% are classical aligned bow shocks.
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Complex spectral variability and hints of a luminous companion in the Be star + black hole binary candidate ALS 8814
ALS 8814 is likely a double-lined binary with two luminous stars plus a possible third companion, not a Be star + black hole binary.
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New Field OB and OBe Binaries of the SMC Wing: Observational Properties and Population Modeling
A six-year radial-velocity and light-curve survey finds that field OBe binaries in the SMC Wing are eccentric while OB binaries are circular, supporting a binary supernova origin for OBe stars.
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