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Signatures of circumstellar interaction in the Type IIL Supernova ASASSN-15oz

Signatures of circumstellar interaction in the Type IIL Supernova ASASSN-15oz
Signatures of circumstellar interaction in the Type IIL Supernova ASASSN-15oz
Hydrogen-rich, core-collapse supernovae are typically divided into four classes: IIP, IIL, IIn, and IIb. Recent hydrodynamic modeling shows that circumstellar material is required to produce the early light curves of most IIP/IIL supernovae. In this scenario, IIL supernovae experience large amounts of mass loss before exploding.We test this hypothesis on ASASSN-15oz, a Type IIL supernova. With extensive follow-up in the X-ray, UV,optical, IR, and radio we present our search for signs of interaction, and the mass-loss history indicated by their detection. We find evidence of short lived intense mass-loss just prior to explosion from light curve modeling ,amounting in 1.5 M of material within 1800 R of the progenitor. Wealso detect the supernova in the radio, indicating mass-loss rates of 10&#x100000;6-10&#x100000;7 M yr&#x100000;1 prior to the extreme mass-loss period. Our failure to detect the supernova in the X-ray and the lack of narrow emission lines in the UV,optical, and NIR do not contradict this picture and place an upper limit on the mass-loss rate outside the extreme period of < 10&#x100000;4 Myr&#x100000;1. This pape rhighlights the importance gathering comprehensive data on more Type II supernovae to enable detailed modeling of the progenitor and supernova which can elucidate their mass-loss histories and envelope structures and thus inform stellar evolution models.Key words: supernovae: general supernovae: individual: ASASSN-15oz stars: late-type stars: winds, outflows techniques: imaging spectroscopy
supernovae: general supernovae: individual: ASASSN-15oz stars: late-type stars: winds, outflows techniques: imaging spectroscopy
0035-8711
Bostroem, K. Azalee
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Valenti, Stefano
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Horesh, Assaf
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Morozova, Viktoriya
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Kuin, N. Paul M.
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Wyatt, Samuel
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Jerkstrand, Anders
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Sand, David J.
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Lundquist, Michael
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Smith, Mathew
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Sullivan, Mark
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Hosseinzadeh, Griffin
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Arcavi, Iair
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Callis, Emma
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Cartier, Régis
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Gal-yam, Avishay
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Galbany, Lluís
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Gutiérrez, Claudia
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Howell, D Andrew
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Inserra, Cosimo
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Kankare, Erkki
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López, Kristhell Marisol
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Mccully, Curtis
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Pignata, Giuliano
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Piro, Anthony L.
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Rodríguez, Ósmar
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Smartt, Stephen J.
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Smith, Kenneth W.
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Yaron, Ofer
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Young, David R.
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Bostroem, K. Azalee
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Valenti, Stefano
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Horesh, Assaf
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Morozova, Viktoriya
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Kuin, N. Paul M.
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Wyatt, Samuel
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Jerkstrand, Anders
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Sand, David J.
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Lundquist, Michael
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Smith, Mathew
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Sullivan, Mark
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Hosseinzadeh, Griffin
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Arcavi, Iair
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Callis, Emma
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Cartier, Régis
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Gal-yam, Avishay
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Galbany, Lluís
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Gutiérrez, Claudia
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Howell, D Andrew
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Inserra, Cosimo
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Kankare, Erkki
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López, Kristhell Marisol
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Mccully, Curtis
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Pignata, Giuliano
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Piro, Anthony L.
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Rodríguez, Ósmar
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Smartt, Stephen J.
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Smith, Kenneth W.
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Yaron, Ofer
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Young, David R.
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Bostroem, K. Azalee, Valenti, Stefano, Horesh, Assaf, Morozova, Viktoriya, Kuin, N. Paul M., Wyatt, Samuel, Jerkstrand, Anders, Sand, David J., Lundquist, Michael, Smith, Mathew, Sullivan, Mark, Hosseinzadeh, Griffin, Arcavi, Iair, Callis, Emma, Cartier, Régis, Gal-yam, Avishay, Galbany, Lluís, Gutiérrez, Claudia, Howell, D Andrew, Inserra, Cosimo, Kankare, Erkki, López, Kristhell Marisol, Mccully, Curtis, Pignata, Giuliano, Piro, Anthony L., Rodríguez, Ósmar, Smartt, Stephen J., Smith, Kenneth W., Yaron, Ofer and Young, David R. (2019) Signatures of circumstellar interaction in the Type IIL Supernova ASASSN-15oz. Monthly Notices of the Royal Astronomical Society. (doi:10.1093/mnras/stz570).

Record type: Article

Abstract

Hydrogen-rich, core-collapse supernovae are typically divided into four classes: IIP, IIL, IIn, and IIb. Recent hydrodynamic modeling shows that circumstellar material is required to produce the early light curves of most IIP/IIL supernovae. In this scenario, IIL supernovae experience large amounts of mass loss before exploding.We test this hypothesis on ASASSN-15oz, a Type IIL supernova. With extensive follow-up in the X-ray, UV,optical, IR, and radio we present our search for signs of interaction, and the mass-loss history indicated by their detection. We find evidence of short lived intense mass-loss just prior to explosion from light curve modeling ,amounting in 1.5 M of material within 1800 R of the progenitor. Wealso detect the supernova in the radio, indicating mass-loss rates of 10&#x100000;6-10&#x100000;7 M yr&#x100000;1 prior to the extreme mass-loss period. Our failure to detect the supernova in the X-ray and the lack of narrow emission lines in the UV,optical, and NIR do not contradict this picture and place an upper limit on the mass-loss rate outside the extreme period of < 10&#x100000;4 Myr&#x100000;1. This pape rhighlights the importance gathering comprehensive data on more Type II supernovae to enable detailed modeling of the progenitor and supernova which can elucidate their mass-loss histories and envelope structures and thus inform stellar evolution models.Key words: supernovae: general supernovae: individual: ASASSN-15oz stars: late-type stars: winds, outflows techniques: imaging spectroscopy

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Signatures of Circumstellar Interaction in the Type IIL Supernova ASASSN-15oz - Accepted Manuscript
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Accepted/In Press date: 11 February 2019
e-pub ahead of print date: 26 February 2019
Keywords: supernovae: general supernovae: individual: ASASSN-15oz stars: late-type stars: winds, outflows techniques: imaging spectroscopy

Identifiers

Local EPrints ID: 429566
URI: https://eprints.soton.ac.uk/id/eprint/429566
ISSN: 0035-8711
PURE UUID: f2eebddb-b9ba-4c96-b241-711ef406c94c
ORCID for Mathew Smith: ORCID iD orcid.org/0000-0002-3321-1432
ORCID for Mark Sullivan: ORCID iD orcid.org/0000-0001-9053-4820
ORCID for Cosimo Inserra: ORCID iD orcid.org/0000-0002-3968-4409

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Date deposited: 29 Mar 2019 17:30
Last modified: 25 Jun 2019 00:31

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Contributors

Author: K. Azalee Bostroem
Author: Stefano Valenti
Author: Assaf Horesh
Author: Viktoriya Morozova
Author: N. Paul M. Kuin
Author: Samuel Wyatt
Author: Anders Jerkstrand
Author: David J. Sand
Author: Michael Lundquist
Author: Mathew Smith ORCID iD
Author: Mark Sullivan ORCID iD
Author: Griffin Hosseinzadeh
Author: Iair Arcavi
Author: Emma Callis
Author: Régis Cartier
Author: Avishay Gal-yam
Author: Lluís Galbany
Author: Claudia Gutiérrez
Author: D Andrew Howell
Author: Cosimo Inserra ORCID iD
Author: Erkki Kankare
Author: Kristhell Marisol López
Author: Curtis Mccully
Author: Giuliano Pignata
Author: Anthony L. Piro
Author: Ósmar Rodríguez
Author: Stephen J. Smartt
Author: Kenneth W. Smith
Author: Ofer Yaron
Author: David R. Young

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