期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 451, 期 3, 页码 2656-2662出版社
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stv1164
关键词
stars: black holes; supernovae: general
资金
- NASA through Einstein Postdoctoral Fellowship by the Chandra X-ray Center [PF4-150123, NAS8-03060]
- NSF [AST-1205732]
- Simons Foundation
- David and Lucile Packard Foundation
- Division Of Astronomical Sciences
- Direct For Mathematical & Physical Scien [1206097] Funding Source: National Science Foundation
Newborn black holes in collapsing massive stars can be accompanied by a fallback disc. The accretion rate is typically super-Eddington and strong disc outflows are expected. Such outflows could be directly observed in some failed explosions of compact (blue supergiants or Wolf-Rayet stars) progenitors, and may be more common than long-duration gamma-ray bursts. Using an analytical model, we show that the fallback disc outflows produce blue UV-optical transients with a peak bolometric luminosity of similar to 10(42-43) erg s(-1) (peak R-band absolute AB magnitudes of -16 to -18) and an emission duration of similar to a few to similar to 10 d. The spectra are likely dominated intermediate mass elements, but will lack much radioactive nuclei and iron-group elements. The above properties are broadly consistent with some of the rapid blue transients detected by Panoramic Survey Telescope & Rapid Response System and Palomar Transient Factory. This scenario can be distinguished from alternative models using radio observations within a few years after the optical peak.
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