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Models of bright nickel-free supernovae from stripped massive stars with circumstellar shells

Kleiser, Io K. W. and Kasen, Daniel and Duffell, Paul C. (2018) Models of bright nickel-free supernovae from stripped massive stars with circumstellar shells. Monthly Notices of the Royal Astronomical Society, 475 (3). pp. 3152-3164. ISSN 0035-8711. doi:10.1093/mnras/stx3321.

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The nature of an emerging class of rapidly fading supernovae (RFSNe) – characterized by their short-lived light-curve duration, but varying widely in peak brightness – remains puzzling. Whether the RFSNe arise from low-mass thermonuclear eruptions on white dwarfs or from the core collapse of massive stars is still a matter of dispute. We explore the possibility that the explosion of hydrogen-free massive stars could produce bright but rapidly fading transients if the effective pre-supernova radii are large and if little or no radioactive nickel is ejected. The source of radiation is then purely due to shock cooling. We study this model of RFSNe using spherically symmetric hydrodynamics and radiation transport calculations of the explosion of stripped stars embedded in helium-dominated winds or shells of various masses and extent. We present a parameter study showing how the properties of the circumstellar envelopes affect the dynamics of the explosion and can lead to a diversity of light curves. We also explore the dynamics of the fallback of the innermost stellar layers, which might be able to remove radioactive nickel from the ejecta, making the rapid decline in the late-time light curve possible. We provide scaling relations that describe how the duration and luminosity of these events depend on the supernova kinetic energy and the mass and radius of the circumstellar material.

Item Type:Article
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URLURL TypeDescription Paper
Duffell, Paul C.0000-0001-7626-9629
Additional Information:© 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society. Accepted 2017 December 21. Received 2017 December 20; in original form 2017 July 24. The authors would like to thank Sterl Phinney, Andrew McFadyen, Lars Bildsten, and Matteo Cantiello for useful discussion and collaboration. IK is supported by the DOE NNSA Stockpile Stewardship Graduate Fellowship Program. This research is also funded in part by the Gordon and Betty Moore Foundation through Grant GBMF5076. DK is supported in part by a Department of Energy Office of Nuclear Physics Early Career Award, and by the Director, Office of Energy Research, Office of High Energy and Nuclear Physics, Divisions of Nuclear Physics, of the US Department of Energy under Contract no. DE-AC02-05CH11231.
Funding AgencyGrant Number
Department of Energy (DOE) National Nuclear Security AdministrationUNSPECIFIED
Gordon and Betty Moore FoundationGBMF5076
Department of Energy (DOE)DE-AC02-05CH11231
Subject Keywords:binaries: general, circumstellar matter, stars: general, supernovae: general, supernovae: individual: SN 2010X, supernovae: individual: SN 2015U, supernovae: individual: SN 2002bj
Issue or Number:3
Record Number:CaltechAUTHORS:20180411-114459247
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Official Citation:Io K W Kleiser, Daniel Kasen, Paul C Duffell; Models of bright nickel-free supernovae from stripped massive stars with circumstellar shells, Monthly Notices of the Royal Astronomical Society, Volume 475, Issue 3, 11 April 2018, Pages 3152–3164,
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:85753
Deposited By: George Porter
Deposited On:11 Apr 2018 20:24
Last Modified:15 Nov 2021 20:31

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