26-30 July 2021
Zoom
Europe/Berlin timezone

Magnetic-field influence on beta-processes in core-collapse supernova

Not scheduled
20m
Zoom

Zoom

Poster Astroparticle and Gravitational Waves T01: Astroparticle and Gravitational Waves

Speaker

Alexandra Dobrynina (P. G. Demidov Yaroslavl State University & University of Hamburg)

Description

Neutrinos play a significant and sometimes even dominant role in all phases of the supernova explosion. The dominant neutrino processes in a core-collapse supernova are beta-processes, which are responsible for the energy exchange between neutrinos and the matter and change a chemical composition of a matter. We investigate an influence of a magnetic field on beta-processes under conditions of a supernova matter. For realistic magnetic fields reachable in astrophysical objects, we obtain simple analytical expressions for reaction rates of beta-processes as well as energy and momentum transferred from neutrino and antineutrinos to the matter. In our analysis we use results of one-dimensional simulations of a supernova explosion performed with the PROMETHEUS-VERTEX code. We found that, in the magnetic field with the strength $B \sim 10^{15}$ G, the quantities considered are modified by several percents only and, as a consequence, the magnetic-field effects can be safely ignored, considering neutrino interaction and propagation in a supernova matter. The work is supported by the Russian Science Foundation (Grant No. 18-72-10070).

Email alexandra.dobrynina@desy.de
Collaboration / Activity no
First author Alexandra Dobrynina

Primary author

Alexandra Dobrynina (P. G. Demidov Yaroslavl State University & University of Hamburg)

Co-author

Dr Igor Ognev (P.G. Demidov Yaroslavl State University)

Presentation Materials