White dwarf dynamical interactions and fast optical transients
| Autor: | Pablo Lorén-Aguilar, Carles Badenes, Enrique García-Berro, Gabriela Aznar-Siguán |
|---|---|
| Přispěvatelé: | Universitat Politècnica de Catalunya. GAA - Grup d'Astronomia i Astrofísica |
| Rok vydání: | 2017 |
| Předmět: |
High Energy Astrophysical Phenomena (astro-ph.HE)
Physics Supernova remnants 010308 nuclear & particles physics Astrophysics::High Energy Astrophysical Phenomena general [Supernovae] FOS: Physical sciences White dwarfs White dwarf Astronomy Astronomy and Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics Estels nans Stars 01 natural sciences Estels Space and Planetary Science Física::Astronomia i astrofísica [Àrees temàtiques de la UPC] 0103 physical sciences Hydrodynamics Astrophysics::Solar and Stellar Astrophysics Astrophysics - High Energy Astrophysical Phenomena 010303 astronomy & astrophysics Astrophysics::Galaxy Astrophysics |
| Zdroj: | UPCommons. Portal del coneixement obert de la UPC Universitat Politècnica de Catalunya (UPC) Recercat. Dipósit de la Recerca de Catalunya instname |
| ISSN: | 1365-2966 0035-8711 |
| DOI: | 10.1093/mnras/stx813 |
| Popis: | Recent advances in time-domain astronomy have uncovered a new class of optical transients with timescales shorter than typical supernovae and a wide range of peak luminosities. Several subtypes have been identified within this broad class, including Ca-rich transients, .Ia supernovae, and fast/bright transients. We examine the predic- tions from a state-of-the-art grid of three-dimensional simulations of dynamical white dwarf interactions in the context of these fast optical transients. We find that for colli- sions involving carbon-oxygen or oxygen-neon white dwarfs the peak luminosities and durations of the light curves in our models are in good agreement with the properties of fast/bright transients. When one of the colliding white dwarfs is made of helium the properties of the light curves are similar to those of Ca-rich gap transients. The model lightcurves from our white dwarf collisions are too slow to reproduce those of .Ia SNe, and too fast to match any normal or peculiar Type Ia supernova. Accepted for publication in MNRAS |
| Databáze: | OpenAIRE |
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