Résumé / Abstract Journal-club_Doctorants

Journal-club Doctorants / Journal-club PhD students

« Cosmic ray feedback in dwarf galaxies »

Gohar Dashyan
PhD student - Institut d'Astrophysique de Paris (Paris, France)

n the cold dark matter (CDM) cosmological model, larger
structures form through successive mergers. Therefore, dwarf galax-
ies (Mvir<10^11Msol) are the smallest probes of cosmological struc-
ture formation. There are a number of puzzles surrounding dwarf
galaxies that pose important challenges to our theoretical under-
standing of galaxy formation (Too big to fail, missing satellites,
and cusp core problems). The inclusion of baryonic feedback could
potentially solve these issues. To achieve this, one would like to
directly simulate the physics responsible for driving galactic winds
and reducing star formation. The problem is that the exact nature
and extent of these feedback processes are still strongly debated
and are implemented in terms of subgrid physics. In this context,
I will tell you about our current work on cosmic ray physics and
their inclusion in numerical simulations through supernova feed-
back. Cosmic rays have several properties which make them a
promising candidate for helping driving galactic winds in dwarf
galaxies.
vendredi 9 février 2018 - 16:00
Salle du Conseil, Institut d'Astrophysique
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