Résumé / Abstract Journal-club_GReCO

Séminaire / Seminar GReCO

« Multi-messenger emission from magnetised core-collapse supernovae  »

Matteo Bugli
joint seminar High Energy/GReCO - Service Physique Théorique (DSM/SPhT), CEA-Saclay (Saclay, France)

The detection of gravitational waves and neutrinos emitted in the first hundreds of milliseconds of the gravitational collapse of a massive star offers a unique window to understand the fundamental dynamics of core-collapse supernova (CCSN) explosions. In fact, multi-dimensional fluid instabilities such as convection, SASI (Standing Accretion Shock Instability) and the low T/|W| instability play a fundamental role in the onset of the explosion, leaving distinctive signatures in the multi-messenger signals produced in the early phase of the shock expansion.

In this seminar I will present recent 3D numerical models of magnetised CCSN, which are aimed at describing the formation of magnetars and the central engines of outstanding stellar explosions (e.g. hypernovae, gamma-ray bursts, superluminous supernovae). I will focus on the impact of fast rotation and strong magnetic fields on the development of large-scale non-axisymmetric instabilities and the consequent modulation of the associated gravitational wave and neutrino signals. I will also briefly describe the connection of the multi-messenger emission to the nuclear composition of the matter ejected by the CCSN, which is a key aspect to understand the chemical evolution of the Universe.
lundi 7 novembre 2022 - 11:00
Salle des séminaires Évry Schatzman
Institut d'Astrophysique de Paris
Pages web du séminaire / Seminar's webpage