The unusual super-luminous supernovae SN 2011kl and ASASSN-15lh

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Two recently discovered very luminous supernovae (SNe) present stimulating cases to explore the extents of the available theoretical models. SN 2011kl represents the first detection of a supernova explosion associated with an ultra-long duration gamma-ray burst. ASASSN-15lh was even claimed as the m...

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Autores principales: Bersten, Melina Cecilia, Benvenuto, Omar Gustavo, Orellana, Mariana Dominga, Nomoto, Ken’ichi
Formato: Articulo
Lenguaje:Inglés
Publicado: 2016
Materias:
Ciencias Astronómicas
gamma-ray burst: individual (GRB 111209A)
stars: evolution
supernovae: general
supernovae: individual (SN 2011kl, ASASSN-15lh)
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/86699
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-86699
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Astronómicas
gamma-ray burst: individual (GRB 111209A)
stars: evolution
supernovae: general
supernovae: individual (SN 2011kl, ASASSN-15lh)
spellingShingle Ciencias Astronómicas
gamma-ray burst: individual (GRB 111209A)
stars: evolution
supernovae: general
supernovae: individual (SN 2011kl, ASASSN-15lh)
Bersten, Melina Cecilia
Benvenuto, Omar Gustavo
Orellana, Mariana Dominga
Nomoto, Ken’ichi
The unusual super-luminous supernovae SN 2011kl and ASASSN-15lh
topic_facet Ciencias Astronómicas
gamma-ray burst: individual (GRB 111209A)
stars: evolution
supernovae: general
supernovae: individual (SN 2011kl, ASASSN-15lh)
description Two recently discovered very luminous supernovae (SNe) present stimulating cases to explore the extents of the available theoretical models. SN 2011kl represents the first detection of a supernova explosion associated with an ultra-long duration gamma-ray burst. ASASSN-15lh was even claimed as the most luminous SN ever discovered, challenging the scenarios so far proposed for stellar explosions. Here we use our radiation hydrodynamics code in order to simulate magnetar-powered SNe. To avoid explicitly assuming neutron star properties, we adopt the magnetar luminosity and spin-down timescale as free parameters of the model. We find that the light curve (LC) of SN 2011kl is consistent with a magnetar power source, as previously proposed, but we note that some amount of <sup>56</sup>Ni (≳0.08M⊙) is necessary to explain the low contrast between the LC peak and tail. For the case of ASASSN-15lh, we find physically plausible magnetar parameters that reproduce the overall shape of the LC provided the progenitor mass is relatively large (an ejecta mass of ≈6M⊙). The ejecta hydrodynamics of this event is dominated by the magnetar input, while the effect is more moderate for SN 2011kl. We conclude that a magnetar model may be used for the interpretation of these events and that the hydrodynamical modeling is necessary to derive the properties of powerful magnetars and their progenitors.
format Articulo
Articulo
author Bersten, Melina Cecilia
Benvenuto, Omar Gustavo
Orellana, Mariana Dominga
Nomoto, Ken’ichi
author_facet Bersten, Melina Cecilia
Benvenuto, Omar Gustavo
Orellana, Mariana Dominga
Nomoto, Ken’ichi
author_sort Bersten, Melina Cecilia
title The unusual super-luminous supernovae SN 2011kl and ASASSN-15lh
title_short The unusual super-luminous supernovae SN 2011kl and ASASSN-15lh
title_full The unusual super-luminous supernovae SN 2011kl and ASASSN-15lh
title_fullStr The unusual super-luminous supernovae SN 2011kl and ASASSN-15lh
title_full_unstemmed The unusual super-luminous supernovae SN 2011kl and ASASSN-15lh
title_sort unusual super-luminous supernovae sn 2011kl and asassn-15lh
publishDate 2016
url http://sedici.unlp.edu.ar/handle/10915/86699
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