Multi-messenger emission from core-collapse supernovae: impact of rotation and magnetic fields

Matteo Bugli (AIM/CEA) - Salle Nef - Zoom

https://univ-cotedazur.zoom.us/j/86082853302?pwd=aGJMYjJjSjBtNHFEUVNJNFpYN3J3QT09

Meeting ID: 860 8285 3302
Passcode: 595457

 

 

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

After presenting a general picture of our current undestanding, I will present recent 3D numerical models of magnetised CCSN, which aim 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.