Navigation überspringen
Universitätsbibliothek Heidelberg
Status: Bibliographieeintrag

Verfügbarkeit
Standort: ---
Exemplare: ---
heiBIB
 Online-Ressource
Verfasst von:Marquardt, Kai S. [VerfasserIn]   i
 Sim, Stuart A. [VerfasserIn]   i
 Ruiter, Ashley J. [VerfasserIn]   i
 Seitenzahl, Ivo R. [VerfasserIn]   i
 Ohlmann, Sebastian T. [VerfasserIn]   i
 Kromer, Markus [VerfasserIn]   i
 Pakmor, Rüdiger [VerfasserIn]   i
 Röpke, Friedrich [VerfasserIn]   i
Titel:Type Ia supernovae from exploding oxygen-neon white dwarfs
Verf.angabe:Kai S. Marquardt, Stuart A. Sim, Ashley J. Ruiter, Ivo R. Seitenzahl, Sebastian T. Ohlmann, Markus Kromer, Rüdiger Pakmor, and Friedrich K. Röpke
E-Jahr:2015
Jahr:14 August 2015
Fussnoten:Gesehen am 08.06.2020
Titel Quelle:Enthalten in: Astronomy and astrophysics
Ort Quelle:Les Ulis : EDP Sciences, 1969
Jahr Quelle:2015
Band/Heft Quelle:580(2015) Artikel-Nummer A118, 7 Seiten
ISSN Quelle:1432-0746
Abstract:Context. The progenitor problem of Type Ia supernovae (SNe Ia) is still unsolved. Most of these events are thought to be explosions of carbon-oxygen (CO) white dwarfs (WDs), but for many of the explosion scenarios, particularly those involving the externally triggered detonation of a sub-Chandrasekhar mass WD (sub-<i>M<i/><sub>Ch<sub/> WD), there is also a possibility of having an oxygen-neon (ONe) WD as progenitor. Aims. We simulate detonations of ONe WDs and calculate synthetic observables from these models. The results are compared with detonations in CO WDs of similar mass and observational data of SNe Ia. Methods. We perform hydrodynamic explosion simulations of detonations in initially hydrostatic ONe WDs for a range of masses below the Chandrasekhar mass (<i>M<i/><sub>Ch<sub/>), followed by detailed nucleosynthetic postprocessing with a 384-isotope nuclear reaction network. The results are used to calculate synthetic spectra and light curves, which are then compared with observations of SNe Ia. We also perform binary evolution calculations to determine the number of SNe Ia involving ONe WDs relative to the number of other promising progenitor channels. <i>Results. <i/>The ejecta structures of our simulated detonations in sub-<i>M<i/><sub>Ch<sub/> ONe WDs are similar to those from CO WDs. There are, however, small systematic deviations in the mass fractions and the ejecta velocities. These lead to spectral features that are systematically less blueshifted. Nevertheless, the synthetic observables of our ONe WD explosions are similar to those obtained from CO models. <i>Conclusions. <i/>Our binary evolution calculations show that a significant fraction (3-10%) of potential progenitor systems should contain an ONe WD. The comparison of our ONe models with our CO models of comparable mass (~1.2 <i>M<i/><sub>⊙<sub/>) shows that the less blueshifted spectral features fit the observations better, although they are too bright for normal SNe Ia.
DOI:doi:10.1051/0004-6361/201525761
URL:Bitte beachten Sie: Dies ist ein Bibliographieeintrag. Ein Volltextzugriff für Mitglieder der Universität besteht hier nur, falls für die entsprechende Zeitschrift/den entsprechenden Sammelband ein Abonnement besteht oder es sich um einen OpenAccess-Titel handelt.

Volltext ; Verlag: https://doi.org/10.1051/0004-6361/201525761
 Volltext: https://www.aanda.org/articles/aa/abs/2015/08/aa25761-15/aa25761-15.html
 DOI: https://doi.org/10.1051/0004-6361/201525761
Datenträger:Online-Ressource
Sprache:eng
K10plus-PPN:1700141481
Verknüpfungen:→ Zeitschrift

Permanenter Link auf diesen Titel (bookmarkfähig):  https://katalog.ub.uni-heidelberg.de/titel/68585162   QR-Code
zum Seitenanfang