SuperNova to Neutron Stars
SN2NS: Supernova explosions, from stellar core-collapse to neutron stars and black holes.
SN2NS is a 4-year program of the French agency ANR whose goal is the modeling of stellar core-collapse, leading to the birth of neutron stars and black holes. It involves three laboratories:
see also the SN2NS dedicated scientific site
Experimental illustration of the hydrodynamical instability breaking the axial symmetry before the explosion, using a shallow water analog
The SN2NS project gathers the expertises of three groups in IRFU (Saclay), IPN (Orsay) and LUTh (Meudon), in order to develop a numerical tool to simulate and understand the core-collapse taking place at the end of the life of massive stars exceeding 9 solar masses. The first second of the collapse determines both the onset of supernova explosions, and the birth conditions of neutron stars and black holes.
The group at IRFU/SAp (T. Foglizzo) is dedicated to characterizing the hydrodynamical consequences of the multidimentional instabilities. The nuclear physicists involved at IPN (J. Margueron, E. Kahn) and LUTh (M. Oertel) will develop an equation of state adapted to the high temperatures of both neutron star and black hole formation. In order to characterize the threshold between the formation of a neutron star and a black hole, the expertise of the group of numerical relativity at LUTh (J. Novak, E. Gourgoulhon) will be crucial. The general relativistic code "CoCoNut" will be improved with a realistic equation of state and evolutive prescriptions for neutrino transport. A Newtonian version of CoCoNut will also be used at IRFU, together with the code RAMSES, to simulate stationary accretion in order to characterize the 3D evolution of the shock instability.
last update : 03-09 00:00:00-2011 (2992)