Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-09-19
Astrophys.J.651:L89-L92,2006
Astronomy and Astrophysics
Astrophysics
four pages, four figures, submitted to ApJL
Scientific paper
10.1086/509636
Using results from high-resolution galaxy formation simulations in a standard Lambda-CDM cosmology and a fully conservative multi-resolution radiative transfer code around point sources, we compute the energy-dependent escape fraction of ionizing photons from a large number of star forming regions in two galaxies at five different redshifts from z=3.8 to 2.39. All escape fractions show a monotonic decline with time, from (at the Lyman-limit) ~6-10% at z=3.6 to ~1-2% at z=2.39, due to higher gas clumping at lower redshifts. It appears that increased feedback can lead to higher f_esc at z>3.4 via evacuation of gas from the vicinity of star forming regions and to lower f_esc at z<2.39 through accumulation of swept-up shells in denser environments. Our results agree well with the observational findings of \citet{inoue..06} on redshift evolution of f_esc in the redshift interval z=2-3.6.
Razoumov Alexei Olegovich
Sommer-Larsen Jesper
No associations
LandOfFree
Escape of ionizing radiation from star forming regions in young galaxies does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Escape of ionizing radiation from star forming regions in young galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Escape of ionizing radiation from star forming regions in young galaxies will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-350116