Résumé / Abstract Journal-club_Doctorants

Journal-club Doctorants / Journal-club PhD students

« Exploring the Role of AGN Feedback in Galaxy Formation »

Rebekka Bieri
PhD Student -

Feedback from active galactic nuclei (AGN) is routinely included in semi-
analytic and numerical simulations. They have shown that such feedback is
able to quench cooling flows and decrease star formation. In cosmological
simulations feedback from radiation as well as jet driven feedback is approximated
by a few parameters usually tuned to match global observations. In reality,
the parameters used to tune the simulations hide complex physics working on
galactic scales that may influence the evolution of these galaxies. I will talk
about the exploration of a more realistic treatment of both natures of AGN
feedback (radiative and mechanical) and its possible impact in high-redshift,
gas-rich galaxies. In specific, I will discuss the coupling of the photons to the
surrounding gas by means of radiative transfer and hydrodynamical simulations
with the RAMSES code and compare it to the sub-grid models of cosmological
simulations. I will then talk about our investigation on how jet-driven feedback
might be a possible explanation of the accumulation of recent observational
data on remarkably high star formation rates in the high-redshift Universe.
jeudi 19 novembre 2015 - 17:00
Salle Entresol Daniel Chalonge, Institut d'Astrophysique
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