Helium stars exploding in circumstellar material and the origin of Type Ibn supernovae
| Autor: | L. Dessart, H. Kuncarayakti, D. J. Hillier |
|---|---|
| Přispěvatelé: | Institut d'Astrophysique de Paris (IAP), Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Astrophysique de Marseille (LAM), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), HEP, INSPIRE |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Astrophysics::High Energy Astrophysical Phenomena
FOS: Physical sciences chemistry.chemical_element Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics 01 natural sciences supernovae: general 0103 physical sciences Astrophysics::Solar and Stellar Astrophysics stars: evolution 010303 astronomy & astrophysics Solar and Stellar Astrophysics (astro-ph.SR) Helium Astrophysics::Galaxy Astrophysics High Energy Astrophysical Phenomena (astro-ph.HE) Physics 010308 nuclear & particles physics Astronomy and Astrophysics Stars Supernova Astrophysics - Solar and Stellar Astrophysics chemistry radiative transfer Space and Planetary Science hydrodynamics Astrophysics - High Energy Astrophysical Phenomena [PHYS.ASTR] Physics [physics]/Astrophysics [astro-ph] [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] stars: mass-loss |
| Zdroj: | Astronomy and Astrophysics-A&A Astronomy and Astrophysics-A&A, 2022, 658, pp.A130. ⟨10.1051/0004-6361/202142436⟩ |
| ISSN: | 0004-6361 |
| Popis: | Type Ibn supernovae (SNe) are a mysterious class of transients whose spectra exhibit persistently narrow HeI lines, and whose bolometric light curves are typically fast evolving and overluminous at peak relative to standard Type Ibc SNe. We explore the interaction scenario of such Type Ibn SNe by performing radiation-hydrodynamics and radiative-transfer calculations. We find that standard-energy helium-star explosions within dense wind-like circumstellar material (CSM) can reach on day timescales a peak luminosity of a few 10^44 erg/s, reminiscent of exceptional events like AT2018cow. Similar interactions but with weaker winds can lead to Type Ibc SNe with double-peak light curves and peak luminosities in the range ~10^42.2 to ~10^43 erg/s. In contrast, the narrow spectral lines and modest peak luminosities of most Type Ibn SNe are suggestive of a low-energy explosion in an initially Comment: Accepted for publication in A&A |
| Databáze: | OpenAIRE |
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