Special Universe Lecture: Predicting the radiative display of Type Ia Supernovae: 2. beyond the standard model

by Stephane Blondin (Laboratoire d’Astrophysique de Marseille, France)

Friday, 21 July 2017 from to (Europe/Berlin)
at Universe Cluster, Boltzmannstr. 2, Garching ( seminar room, basement )
Note time change!

Abstract: Despite the successes of the standard Chandrasekhar-mass model to explain the observed properties of Type Ia supernovae (SNe Ia), they systematically fail to reproduce the faster light-curve evolution of low-luminosity events. Stephane will show that an ejecta below the Chandrasekhar mass is essential in reproducing the rapidly-declining light curves characteristic of SNe Ia at the faint end of the luminosity function. He will also demonstrate that such sub-Chandrasekhar-mass models present fundamental difficulties in reproducing the post-maximum evolution of brighter events. These results imply that a range of progenitor white dwarf masses is needed to reproduce the full range of observed SN Ia properties, and hence make a strong case for the existence of multiple progenitor channels for these events.

Stephane is a Cluster guest. Local host: Bruno Leibundgut (ESO)