Electronic Resource
Pulsating reverse detonation models of Type Ia supernovae. II. Explosion
| العنوان: | Pulsating reverse detonation models of Type Ia supernovae. II. Explosion |
|---|---|
| المؤلفون: | Universitat Politècnica de Catalunya. Departament de Física i Enginyeria Nuclear, Universitat Politècnica de Catalunya. GAA - Grup d'Astronomia i Astrofísica, Bravo Guil, Eduardo, García Senz, Domingo, Cabezón Gómez, Rubén Martín, Domínguez, Inmaculada |
| بيانات النشر: | 2009-04 |
| نوع الوثيقة: | Electronic Resource |
| مستخلص: | Observational evidences point to a common explosion mechanism of Type Ia supernovae based on a delayed detonation of a white dwarf (WD). However, all attempts to find a convincing ignition mechanism based on a delayed detonation in a destabilized, expanding, white dwarf have been elusive so far. One of the possibilities that has been invoked is that an inefficient deflagration leads to pulsation of a Chandrasekhar-mass WD, followed by formation of an accretion shock that confines a carbon–oxygen rich core, while transforming the kinetic energy of the collapsing halo into thermal energy of the core, until an inward moving detonation is formed. This chain of events has been termed Pulsating Reverse Detonation (PRD). In this work, we present three-dimensional numerical simulations of PRD models from the time of detonation initiation up to homologous expansion. Different models characterized by the amount of mass burned during the deflagration phase, Mdefl, give explosions spanning a range of kinetic energies, K ∼ (1.0–1.2)×1051 erg, and 56Ni masses, M(56Ni) ∼ 0.6–0.8 M , which are compatible with what is expected for typical Type Ia supernovae. Spectra and light curves of angle-averaged spherically symmetric versions of the PRD models are discussed. Type Ia supernova spectra pose the most stringent requirements on PRD models. Peer Reviewed Postprint (published version) |
| مصطلحات الفهرس: | Àrees temàtiques de la UPC::Física::Astronomia i astrofísica, Supernovae, Hydrodynamics – nuclear reactions, Nucleosynthesis, Abundances – supernovae: general, Supernoves, Article |
| URL: | |
| الاتاحة: | Open access content. Open access content Restricted access - publisher's policy |
| ملاحظة: | 16 p. application/pdf English |
| Other Numbers: | HGF oai:upcommons.upc.edu:2117/19173 Bravo, E. [et al.]. Pulsating reverse detonation models of Type Ia supernovae. II. Explosion. "Astrophysical journal", Abril 2009, vol. 695, núm. 2, p. 1257-1272. 0004-637X 10.1088/0004-637X/695/2/1257 1132968722 |
| المصدر المساهم: | UNIV POLITECNICA DE CATALUNYA From OAIster®, provided by the OCLC Cooperative. |
| رقم الانضمام: | edsoai.on1132968722 |
| قاعدة البيانات: | OAIster |
| الوصف غير متاح. |