Séminaire Doctoral / Seminar PhD |
| « Cosmic ray feedback in dwarf galaxies » |
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Gohar Dashyan |
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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. |
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vendredi 9 février 2018 - 16:00 Salle du Conseil, Institut d'Astrophysique |
| Page web du séminaire / Seminar's webpage |