The Growth of HII Regions During Reionization

Details The Growth of HII Regions During Reionization The Growth of HII Regions During Reionization

2004-03-31

arxiv.org/abs/astro-ph/0403697v1

Astrophys.J. 613 (2004) 1-15

Astronomy and Astrophysics

Astrophysics

14 pages, 13 figures, submitted to ApJ

Scientific paper

10.1086/423025

Recently, there has been a great deal of interest in understanding the reionization of hydrogen in the intergalactic medium (IGM). One of the major outstanding questions is how this event proceeds on large scales. Motivated by numerical simulations, we develop a model for the growth of HII regions during the reionization era. We associate ionized regions with large-scale density fluctuations and use the excursion set formalism to model the resulting size distribution. We then consider ways in which to characterize the morphology of ionized regions. We show how to construct the power spectrum of fluctuations in the neutral hydrogen field. The power spectrum contains definite features from the HII regions that should be observable with the next generation of low-frequency radio telescopes through surveys of redshifted 21 cm emission from the reionization era. Finally, we also consider statistical descriptions beyond the power spectrum and show that our model of reionization qualitatively changes the distribution of neutral gas in the IGM.

Affiliated with

Also associated with

No associations

Rating

The Growth of HII Regions During Reionization 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 The Growth of HII Regions During Reionization, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Growth of HII Regions During Reionization will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-616651