THE UNUSUAL SUPER-LUMINOUS SUPERNOVAE SN 2011KL AND ASASSN-15LH
| Autor: | Melina C. Bersten, Ken'ichi Nomoto, Omar Gustavo Benvenuto, Mariana Dominga Orellana |
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| Rok vydání: | 2016 |
| Předmět: |
Ciencias Astronómicas
Ciencias Físicas Astrophysics::High Energy Astrophysical Phenomena supernovae: individual (SN 2011kl ASASSN-15lh) FOS: Physical sciences Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics SN 2011kl (supernova) ASASSN-15lh individual (SN 2011kl ASASSN-15lh) [supernovae] Magnetar 01 natural sciences Gamma ray bursts Luminosity purl.org/becyt/ford/1 [https] supernovae: general 0103 physical sciences Astrophysics::Solar and Stellar Astrophysics stars: evolution 010306 general physics Ejecta 010303 astronomy & astrophysics Solar and Stellar Astrophysics (astro-ph.SR) ASASSN-15lh (supernova) Astrophysics::Galaxy Astrophysics individual (GRB 111209A) [gamma-ray burst] High Energy Astrophysical Phenomena (astro-ph.HE) Physics Astronomy and Astrophysics purl.org/becyt/ford/1.3 [https] Light curve SN 2011kl Astronomía Neutron star Supernova Supernovae Astrophysics - Solar and Stellar Astrophysics Space and Planetary Science evolution [stars] Astrophysics - High Energy Astrophysical Phenomena Gamma-ray burst general [supernovae] Event (particle physics) gamma-ray burst: individual (GRB 111209A) CIENCIAS NATURALES Y EXACTAS |
| Zdroj: | CONICET Digital (CONICET) Consejo Nacional de Investigaciones Científicas y Técnicas instacron:CONICET SEDICI (UNLP) Universidad Nacional de La Plata instacron:UNLP RID-UNRN (UNRN) Universidad Nacional de Río Negro instacron:UNRN |
| ISSN: | 2041-8213 |
| Popis: | 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 56Ni (≳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. Facultad de Ciencias Astronómicas y Geofísicas Instituto de Astrofísica de La Plata |
| Databáze: | OpenAIRE |
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