SN 2022jli: The ultraluminous birth of a low-mass X-ray binary
arXiv:2402.09509 · doi:10.1051/0004-6361/202349002
Abstract
Observations show that the 12.4 d binary system descending from the recent supernova SN 2022jli closely fits hypotheses of how low-mass X-ray binaries form, but requires an apparently super-Eddington accretion luminosity from the accreting component. We show that this agrees very well with the type of accretion-induced beaming found in ultraluminous X-ray sources, as recently strongly confirmed by X-ray polarimetry of the X-ray binary Cyg X-3. Beaming in the SN2022jli binary system occurs because of the very high mass-transfer rate induced by the violent effect of the supernova on the binary geometry. This explains the very soft nature of the accretion luminosity, its distinctive periodic light curve, and its luminosity decay on a ~250 day timescale. A test of this picture is that the system's orbital period should increase on a year timescale.
arXiv commentAstronomy and Astrophysics Letters, in press
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