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- W2765682318 abstract "We consider radio emission from a newborn black hole (BH), which is accompanied by a mini-disk with a mass of $lesssim M_odot$. Such a disk can be formed from an outer edge of the progenitor's envelope, especially for metal-poor massive stars and/or massive stars in close binaries. The disk accretion rate is typically super-Eddington and an ultrafast outflow with a velocity of $sim 0.1mbox{-}0.3,c$ will be launched into the circumstellar medium. The outflow forms a collisionless shock, and electrons are accelerated and emit synchrotron emission in radio bands with a flux of $sim 10^{26-30} rm erg s^{-1} Hz^{-1}$ days to decades after the BH formation. The model predicts not only a fast UV/optical transient but also quasi-simultaneous inverse-Compton X-ray emission $sim$ a few days after the BH formation, and the discovery of the radio counterpart with coordinated searches will enable us to identify this type of transients. The occurrence rate can be $0.1-10 %$ of the core-collapse supernova rate, which makes them a promising target of dedicated radio observations such as the Jansky VLA Sky Survey." @default.
- W2765682318 created "2017-11-10" @default.
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- W2765682318 date "2018-05-03" @default.
- W2765682318 modified "2023-10-14" @default.
- W2765682318 title "Radio transients from newborn black holes" @default.
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- W2765682318 doi "https://doi.org/10.1093/mnras/sty1145" @default.
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