You are here: Home / Seminars / Seminar Database / HEP Seminar: The progenitors of type Ia supernovae are head-on collisions of white dwarfs in triple systems

HEP Seminar: The progenitors of type Ia supernovae are head-on collisions of white dwarfs in triple systems

Main Content

Doron Kushnir, Institute for Advanced Study
When
19 February 2014 from 2:30 PM to 3:30 PM
Where
339 Davey Laboratory
Contact Name
Contact Phone
814-865-4306
Add event to calendar
vCal
iCal

Type Ia supernovae (SNe Ia), thermonuclear explosions of carbon-oxygen white dwarfs (CO-WDs), are currently the best cosmological ``standard candles'', but the triggering mechanism of the explosion is unknown. It was recently shown that the rate of head-on collisions of typical field CO-WDs in triple systems may be comparable to the SNe Ia rate. I will provide evidence supporting a scenario in which the majority of SNe Ia are the result of such head-on collisions of CO-WDs. In this case, the nuclear detonation is due to a well understood shock ignition, devoid of commonly introduced free parameters such as the deflagration velocity or transition to detonation criteria.

Seminars