Conference GALAXY EVOLUTION ACROSS TIME 12-16 Jun 2017 Paris (France)
Published June 14, 2017 | Version v1
Poster Open

Effect of feedback on the escape of ionizing radiation from high-z galaxies

Authors/Creators

  • 1. Institut d'Astrophysique de Paris, Centre de Recherche en Astrophysique de Lyon
  • 2. Centre de Recherche en Astrophysique de Lyon
  • 3. Oxford Astrophysics, Centre de Recherche en Astrophysique de Lyon
  • 4. Oxford Astrophysics

Description

Quantifying how much of the ionizing radiation produced in high-redshift galaxies escapes in the IGM is one of the main challenges in understanding the sources of reionization. We investigate the radiative properties of simulated low mass galaxies (halos of a few 109 Msun at z=6), where radiation is modelled on-the-fly, and different sources of feedback (from stars and AGN) are included.

Using radiation-hydrodynamic simulations performed with Ramses-RT we study how the energy and momentum input from supernovae and black hole activity modulates the properties of the interstellar medium and therefore how, and how many, photons can escape from the galaxy.

I will present simulations showing (Trebitsch et al. 2017, https://arxiv.org/abs/1705.00941) that stellar feedback has a pivotal role in regulating the escape fraction in dwarf galaxies. Supernovae carve holes in the gas distribution, through which ionizing photons can escape.

 

Notes

Based on the results of Trebitsch et al. (2017), arXiv:1705.00941. MT and JB acknowledge support from the Lyon Institute of Origins under grant ANR-10-LABX-66, and from the ORAGE project from the Agence Nationale de la Recherche under grand ANR-14-CE33-0016- 03. MT acknowledges funding from the European Research Council under the European Community's Seventh Framework Programme (FP7/2007-2013 Grant Agreement no. 614199, project 'BLACK'), and the hospitality of the University of Oxford and New College through the award of a Balzan Fellowship. JR was funded by the European Research Council under the European Union's Seventh Framework Programme (FP7/2007-2013 Grant Agreement no. 278594, project 'GasAroundGalaxies') and the Marie Curie Training Network CosmoComp (PITN-GA-2009-238356). Simulations were run at the Common Computing Facility (CCF) of LABEX LIO (ANR-10-LABX-66).

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Additional details

Related works

References
arXiv:1705.00941 (arXiv)

Funding

European Commission
COSMOCOMP - Pan-European training in computational cosmology: modelling cosmic structures 238356
European Commission
GASAROUNDGALAXIES - Studying the gas around galaxies with the Multi Unit Spectroscopic Explorer and hydrodynamical simulations 278594
European Commission
BLACK - The formation and evolution of massive black holes 614199