Extreme supernova models for the super-luminous transient ASASSN-15LH
Abstract
The recent discovery of the unprecedentedly super-luminous transient ASASSN-15lh (or SN 2015L) with its UV-bright secondary peak challenges all the power-input models that have been proposed for super-luminous supernovae. Here we examine some of the few viable interpretations of ASASSN-15lh in the context of a stellar explosion, involving combinations of one or more power inputs. We model the light curve of ASASSN-15lh with a hybrid model that includes contributions from magnetar spin-down energy and hydrogen-poor circumstellar interaction. We also investigate models of pure circumstellar interaction with a massive hydrogen-deficient shell and discuss the lack of interaction features in the observed spectra. We find that, as a supernova, ASASSN-15lh can be best modeled by the energetic core-collapse of an ~40 M ⊙ star interacting with a hydrogen-poor shell of ~20 M ⊙. The circumstellar shell and progenitor mass are consistent with a rapidly rotating pulsational pair-instability supernova progenitor as required for strong interaction following the final supernova explosion. Additional energy injection by a magnetar with an initial period of 1–2 ms and magnetic field of 0.1–1 × 1014 G may supply the excess luminosity required to overcome the deficit in single-component models, but this requires more fine-tuning and extreme parameters formore »
- Authors:
-
[1];
[2];
[3];
[5];
- Univ. of Chicago, Chicago, IL (United States)
- Univ. of Texas at Austin, Austin, TX (United States)
- Univ. of Texas at Austin, Austin, TX (United States); Univ. of Szeged, Szeged (Hungary); Hungarian Academy of Sciences, Budapest (Hungary)
- Univ. of Szeged, Szeged (Hungary)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Brigham Young Univ., Provo, UT (United States)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Publication Date:
- Research Org.:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA)
- OSTI Identifier:
- 1338805
- Report Number(s):
- LA-UR-16-22014
Journal ID: ISSN 1538-4357; TRN: US1701660
- Grant/Contract Number:
- AC52-06NA25396
- Resource Type:
- Accepted Manuscript
- Journal Name:
- The Astrophysical Journal (Online)
- Additional Journal Information:
- Journal Name: The Astrophysical Journal (Online); Journal Volume: 828; Journal Issue: 2; Journal ID: ISSN 1538-4357
- Publisher:
- Institute of Physics (IOP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 79 ASTRONOMY AND ASTROPHYSICS; supernovae; circumstellar matter; stars: evolution; stars: mass-loss; stars: massive; supernovae: general
Citation Formats
Chatzopoulos, Emmanouil, Wheeler, John C., Vinko, J., Nagy, A. P., Wiggins, Brandon Kerry, and Even, Wesley Paul. Extreme supernova models for the super-luminous transient ASASSN-15LH. United States: N. p., 2016.
Web. doi:10.3847/0004-637X/828/2/94.
Chatzopoulos, Emmanouil, Wheeler, John C., Vinko, J., Nagy, A. P., Wiggins, Brandon Kerry, & Even, Wesley Paul. Extreme supernova models for the super-luminous transient ASASSN-15LH. United States. https://doi.org/10.3847/0004-637X/828/2/94
Chatzopoulos, Emmanouil, Wheeler, John C., Vinko, J., Nagy, A. P., Wiggins, Brandon Kerry, and Even, Wesley Paul. Wed .
"Extreme supernova models for the super-luminous transient ASASSN-15LH". United States. https://doi.org/10.3847/0004-637X/828/2/94. https://www.osti.gov/servlets/purl/1338805.
@article{osti_1338805,
title = {Extreme supernova models for the super-luminous transient ASASSN-15LH},
author = {Chatzopoulos, Emmanouil and Wheeler, John C. and Vinko, J. and Nagy, A. P. and Wiggins, Brandon Kerry and Even, Wesley Paul},
abstractNote = {The recent discovery of the unprecedentedly super-luminous transient ASASSN-15lh (or SN 2015L) with its UV-bright secondary peak challenges all the power-input models that have been proposed for super-luminous supernovae. Here we examine some of the few viable interpretations of ASASSN-15lh in the context of a stellar explosion, involving combinations of one or more power inputs. We model the light curve of ASASSN-15lh with a hybrid model that includes contributions from magnetar spin-down energy and hydrogen-poor circumstellar interaction. We also investigate models of pure circumstellar interaction with a massive hydrogen-deficient shell and discuss the lack of interaction features in the observed spectra. We find that, as a supernova, ASASSN-15lh can be best modeled by the energetic core-collapse of an ~40 M ⊙ star interacting with a hydrogen-poor shell of ~20 M ⊙. The circumstellar shell and progenitor mass are consistent with a rapidly rotating pulsational pair-instability supernova progenitor as required for strong interaction following the final supernova explosion. Additional energy injection by a magnetar with an initial period of 1–2 ms and magnetic field of 0.1–1 × 1014 G may supply the excess luminosity required to overcome the deficit in single-component models, but this requires more fine-tuning and extreme parameters for the magnetar, as well as the assumption of efficient conversion of magnetar energy into radiation. As a result, we thus favor a single-input model where the reverse shock formed in a strong SN ejecta–circumstellar matter interaction following a very powerful core-collapse SN explosion can supply the luminosity needed to reproduce the late-time UV-bright plateau.},
doi = {10.3847/0004-637X/828/2/94},
journal = {The Astrophysical Journal (Online)},
number = 2,
volume = 828,
place = {United States},
year = {Wed Sep 07 00:00:00 EDT 2016},
month = {Wed Sep 07 00:00:00 EDT 2016}
}
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