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 Jul 2017, 13:00 → 14:00 Europe/Berlin

seminar room, basement (Universe Cluster, Boltzmannstr. 2, Garching)

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)

Slides sblondin_excellence_cluster_part3.pdf