Astronomy and Astrophysics – Astrophysics
Scientific paper
2004-03-08
Astrophys.J. 620 (2005) 553-558
Astronomy and Astrophysics
Astrophysics
12 pages, 1 figure, ApJ, submitted
Scientific paper
10.1086/427229
Recently, Pello et al. (2004) claimed to have discovered a galaxy at a redshift z=10, and identified a feature in its spectrum with a hydrogen Lyman-alpha emission line. If this identification is correct, we show that the intergalactic medium (IGM) around the galaxy must be significantly ionized; otherwise, the damping wing of Lyman-alpha absorption by the neutral IGM would have greatly suppressed the emission line. We find either that the large-scale region surrounding this galaxy must have been largely reionized by z=10 (with a neutral fraction <0.4) or that the stars within the galaxy must be massive (>100 solar masses), and hence capable of producing a sufficiently large HII region around it. We generalize these conclusions and derive the maximum Lyman-alpha line flux for a given UV continuum flux of galaxies prior to the epoch of reionization.
Barkana Rennan
Hernquist Lars
Loeb Abraham
No associations
LandOfFree
Was the Universe Reionized at Redshift 10? 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 Was the Universe Reionized at Redshift 10?, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Was the Universe Reionized at Redshift 10? will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-180146