期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 508, 期 2, 页码 2386-2398出版社
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stab2687
关键词
binaries: close; stars: jets; Supernovae: general; transients: supernovae
资金
- Pazy Foundation
- National Science Foundation [1814967]
- DOE
- Advanced Simulation and Computing Program
- Scientific Discovery through Advanced Computing Program
- Direct For Mathematical & Physical Scien
- Division Of Astronomical Sciences [1814967] Funding Source: National Science Foundation
Researchers conducted three-dimensional hydrodynamical simulations of eccentric common envelope jet supernova (CEJSN) impostors, finding that the outflow morphology is complex and non-spherical, with a bumpy light curve showing distinct rise and decay processes. Eccentric CEJSN impostors may account for some peculiar 'gap' objects in the form of intermediate luminosity optical transients.
We conduct three-dimensional hydrodynamical simulations of ecceniric common envelope jet supernova (CEJSN) impostors, i.e. a neutron star that crosses through the envelope of a red supergiant star on a highly eccentric orbit and launches jets as it accretes mass from the envelope. Because of numerical limitations, we apply a simple prescription where we inject the assumed jets' power into two opposite conical regions inside the envelope. We find the outflow morphology to be very complicated, clumpy, and non-spherical, having a large-scale symmetry only about the equatorial plane. The outflow morphology can substantially differ between simulations that differ by their jets' power. We estimate by simple means the light curve to be very bumpy, to have a rise time of one to a few months, and to slowly decay in about a year to several years. These eccentric CEJSN impostors will be classified as 'gap' objects, i.e. having a luminosity between those of classical novae and typical supernovae (termed also ILOTs for intermediate luminosity optical transients). We strengthen a previous conclusion that CEJSN impostors might account for some peculiar ILOTs, in particular those that might repeat over time-scales of months to years.
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