SIMBAD references

2019ApJ...875...17K - Astrophys. J., 875, 17-17 (2019/April-2)

Evolution of the progenitors of SNe 1993J and 2011dh revealed through late-time radio and X-ray studies.

KUNDU E., LUNDQVIST P., SOROKINA E., PEREZ-TORRES M.A., BLINNIKOV S., O'CONNOR E., ERGON M., CHANDRA P. and DAS B.

Abstract (from CDS):

We perform hydrodynamical simulations of the interaction between supernova (SN) ejecta and circumstellar medium (CSM) for SN 1993J and SN 2011dh, and calculate the radio and X-ray emissions expected from the shocked gas at late epochs (t). Considering the ejecta structure from multi-group radiation hydrodynamics simulation, we find that the observed rapid drop in radio and X-ray light curves of SN 1993J at t > 3000 days may be due to a change in the mass-loss rate ({dot}M) ∼6500 yr prior to the explosion of the SN. The exact epoch scales inversely with the assumed wind velocity of vw = 10 kms–1. The progenitor of this SN very likely belonged to a binary system, where, during its evolution, the primary had transferred material to the secondary. It is argued in this paper that the change in {dot}M can happen because of a change in the mass accretion efficiency (η) of the companion star. It is possible that before ∼6500 (vw/10 kms–1)–1 yr prior to the explosion, η was high, and thus the CSM was tenuous, which causes the late-time downturn in fluxes. In the case of SN 2011dh, the late-time evolution is found to be consistent with a wind medium with {dot}M/vw = 4 x 10–6 Myr–1/10 kms–1. It is difficult from our analysis to predict whether the progenitor of this SN had a binary companion; however, if future observations show a similar decrease in radio and X-ray fluxes, then this would give strong support to a scenario where both SNe had undergone a similar kind of binary evolution before explosion.

Abstract Copyright: © 2019. The American Astronomical Society. All rights reserved.

Journal keyword(s): circumstellar matter - hydrodynamics - radiation mechanisms: non-thermal - radiation mechanisms: thermal - supernovae: individual: (SN 1993J, SN 2011dh)

Simbad objects: 8

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2019.10.21-16:21:48

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