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OGLE-2014-SN-131: a long-rising Type Ibn supernova from a massive progenitor

OGLE-2014-SN-131: a long-rising Type Ibn supernova from a massive progenitor
OGLE-2014-SN-131: a long-rising Type Ibn supernova from a massive progenitor
Context. Type Ibn supernovae (SNe Ibn) are thought to be thecore-collapse explosions of massive stars whose ejecta interact withHe-rich circumstellar material (CSM). Aims: We report thediscovery of a SN Ibn, with the longest rise-time ever observed,OGLE-2014-SN-131. We discuss the potential powering mechanisms and theprogenitor nature of this peculiar stripped-envelope (SE),circumstellar-interacting SN. Methods: Optical photometry andspectroscopy were obtained with multiple telescopes including VLT, NTT,and GROND. We compare light curves and spectra with those of other knownSNe Ibn and Ibc. CSM velocities are derived from the spectral analysis.The SN light curve is modeled under different assumptions about itspowering mechanism (56Ni decay, CSM-interaction, magnetar) inorder to estimate the SN progenitor parameters. Results:OGLE-2014-SN-131 spectroscopically resembles SNe Ibn such as SN 2010al.Its peak luminosity and post-peak colors are also similar to those ofother SNe Ibn. However, it shows an unprecedentedly long rise-time and amuch broader light curve compared to other SNe Ibn. Its bolometric lightcurve can be reproduced by magnetar and CSM-interaction models, but notby a 56Ni-decay powering model. Conclusions: Toexplain the unusually long rise-time, the broad light curve, the lightcurve decline, and the spectra characterized by narrow emission lines,we favor a powering mechanism where the SN ejecta are interacting with adense CSM. The progenitor of OGLE-2014-SN-131 was likely a Wolf-Rayetstar with a mass greater than that of a typical SN Ibn progenitor, whichexpelled the CSM that the SN is interacting with.The photometry is available at the CDS via anonymous ftp to http://cdsarc.u-strasbg.fr (http://130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/602/A93.
supernovae: individual: OGLE-2014-SN-131, supernovae: general
0004-6361
1-14
Karamehmetoglu, E.
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Taddia, F.
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Sollerman, J.
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Wyrzykowski, Ł.
04cdead5-8b2e-4b92-822b-63806bd23b50
Schmidl, S.
853b9188-0d1c-473f-bf77-a4227072d2b8
Fraser, M.
525afe70-c2ed-49e4-b46d-3fe44dd2de68
Fremling, C.
89a307a2-b48a-4e01-b4c3-de659eb15398
Greiner, J.
d9bc880b-1515-4291-b794-dd81b4e28c86
Inserra, C.
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Kostrzewa-Rutkowska, Z.
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Maguire, K.
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Smartt, S.
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Sullivan, M.
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Young, D.R.
aca2d61d-345c-4e25-93f6-7772b4540aab
Karamehmetoglu, E.
d0a69947-7d27-4b82-b763-37b7039441e1
Taddia, F.
7003cdfc-f170-49b7-9776-87f701a17e0b
Sollerman, J.
a37ec2c5-4e23-49d1-800f-5a7b830d75f0
Wyrzykowski, Ł.
04cdead5-8b2e-4b92-822b-63806bd23b50
Schmidl, S.
853b9188-0d1c-473f-bf77-a4227072d2b8
Fraser, M.
525afe70-c2ed-49e4-b46d-3fe44dd2de68
Fremling, C.
89a307a2-b48a-4e01-b4c3-de659eb15398
Greiner, J.
d9bc880b-1515-4291-b794-dd81b4e28c86
Inserra, C.
004da73f-5b5e-43f4-b1a7-aaa0e579672e
Kostrzewa-Rutkowska, Z.
5d2c3055-51fa-4726-995e-6aceb72e49b7
Maguire, K.
94dfab90-b220-454f-8d2a-4ab4ffe27c65
Smartt, S.
7a23f75b-cd44-4f38-9da1-bc9ea9052764
Sullivan, M.
2f31f9fa-8e79-4b35-98e2-0cb38f503850
Young, D.R.
aca2d61d-345c-4e25-93f6-7772b4540aab

Karamehmetoglu, E., Taddia, F., Sollerman, J., Wyrzykowski, Ł., Schmidl, S., Fraser, M., Fremling, C., Greiner, J., Inserra, C., Kostrzewa-Rutkowska, Z., Maguire, K., Smartt, S., Sullivan, M. and Young, D.R. (2017) OGLE-2014-SN-131: a long-rising Type Ibn supernova from a massive progenitor. Astronomy & Astrophysics, 602, 1-14. (doi:10.1051/0004-6361/201629619).

Record type: Article

Abstract

Context. Type Ibn supernovae (SNe Ibn) are thought to be thecore-collapse explosions of massive stars whose ejecta interact withHe-rich circumstellar material (CSM). Aims: We report thediscovery of a SN Ibn, with the longest rise-time ever observed,OGLE-2014-SN-131. We discuss the potential powering mechanisms and theprogenitor nature of this peculiar stripped-envelope (SE),circumstellar-interacting SN. Methods: Optical photometry andspectroscopy were obtained with multiple telescopes including VLT, NTT,and GROND. We compare light curves and spectra with those of other knownSNe Ibn and Ibc. CSM velocities are derived from the spectral analysis.The SN light curve is modeled under different assumptions about itspowering mechanism (56Ni decay, CSM-interaction, magnetar) inorder to estimate the SN progenitor parameters. Results:OGLE-2014-SN-131 spectroscopically resembles SNe Ibn such as SN 2010al.Its peak luminosity and post-peak colors are also similar to those ofother SNe Ibn. However, it shows an unprecedentedly long rise-time and amuch broader light curve compared to other SNe Ibn. Its bolometric lightcurve can be reproduced by magnetar and CSM-interaction models, but notby a 56Ni-decay powering model. Conclusions: Toexplain the unusually long rise-time, the broad light curve, the lightcurve decline, and the spectra characterized by narrow emission lines,we favor a powering mechanism where the SN ejecta are interacting with adense CSM. The progenitor of OGLE-2014-SN-131 was likely a Wolf-Rayetstar with a mass greater than that of a typical SN Ibn progenitor, whichexpelled the CSM that the SN is interacting with.The photometry is available at the CDS via anonymous ftp to http://cdsarc.u-strasbg.fr (http://130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/602/A93.

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OGLE_2014_SN_131_toArxiv - Accepted Manuscript
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Accepted/In Press date: 12 March 2017
e-pub ahead of print date: 20 June 2017
Published date: June 2017
Keywords: supernovae: individual: OGLE-2014-SN-131, supernovae: general

Identifiers

Local EPrints ID: 413052
URI: https://eprints.soton.ac.uk/id/eprint/413052
ISSN: 0004-6361
PURE UUID: bcf5cc27-1f00-407e-852a-fb129e4449b4
ORCID for C. Inserra: ORCID iD orcid.org/0000-0002-3968-4409
ORCID for M. Sullivan: ORCID iD orcid.org/0000-0001-9053-4820

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Date deposited: 14 Aug 2017 16:30
Last modified: 14 Mar 2019 01:35

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Contributors

Author: E. Karamehmetoglu
Author: F. Taddia
Author: J. Sollerman
Author: Ł. Wyrzykowski
Author: S. Schmidl
Author: M. Fraser
Author: C. Fremling
Author: J. Greiner
Author: C. Inserra ORCID iD
Author: Z. Kostrzewa-Rutkowska
Author: K. Maguire
Author: S. Smartt
Author: M. Sullivan ORCID iD
Author: D.R. Young

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