Evolution of the Progenitors of SNe 1993J and 2011dh Revealed through Late-time Radio and X-Ray Studies

Kundu, E. ; Lundqvist, P. ; Sorokina, E. ; Pérez-Torres, M. A. ; Blinnikov, S. ; O’Connor, E. ; Ergon, M. ; Chandra, P. ; Das, B. (2019) Evolution of the Progenitors of SNe 1993J and 2011dh Revealed through Late-time Radio and X-Ray Studies The Astrophysical Journal, 875 (1). p. 17. ISSN 1538-4357

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Official URL: http://doi.org/10.3847/1538-4357/ab0d81

Related URL: http://dx.doi.org/10.3847/1538-4357/ab0d81

Abstract

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 $\mathrm{km}\,{{\rm{s}}}^{-1}$. 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 $\mathrm{km}\,{{\rm{s}}}^{-1}$)−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 × 10−6 ${M}_{\odot }\,{\mathrm{yr}}^{-1}$/10 $\mathrm{km}\,{{\rm{s}}}^{-1}$. 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.

Item Type:Article
Source:Copyright of this article belongs to IOP Publishing
Keywords:circumstellar matter; hydrodynamics; radiation mechanisms: non-thermal; radiation mechanisms: thermal; supernovae: individual: SN 1993J; SN 2011dh; Astrophysics - High Energy Astrophysical Phenomena
ID Code:125638
Deposited On:29 Sep 2022 06:27
Last Modified:10 Nov 2022 07:41

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