Effect Of Feedback On The Escape Of Ionizing Radiation From High-Z Galaxies
Abstract
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.- Publication:
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Galaxy Evolution Across Time
- Pub Date:
- June 2017
- DOI:
- 10.5281/zenodo.808185
- Bibcode:
- 2017geat.confE..49T
- Keywords:
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- Zenodo community across2017