Journal
ASTROPHYSICAL JOURNAL
Volume 533, Issue 2, Pages 594-600Publisher
IOP PUBLISHING LTD
DOI: 10.1086/308673
Keywords
atomic processes; cosmology : theory; galaxies : formation; intergalactic medium
Categories
Ask authors/readers for more resources
We study the effects of the ionizing and dissociating photons produced by Population III objects on the surrounding intergalactic medium. We find that the typical size of an H(2) photodissociated region, R(d) approximate to 1-5 kpc, is smaller than the mean distance between sources at z approximate to 20-30 but larger than the ionized region by a factor depending on the detailed properties of the emission spectrum. This implies that clearing of intergalactic H(2) occurs before reionization of the universe is complete. In the same redshift range, the soft-UV background in the Lyman-Werner bands, when the intergalactic H and H(2) opacity is included, is found to be J(LW) approximate to 10(-30) to 10(-27) ergs cm(-2) s(-1) Hz(-1). This value is well below the threshold required for the negative feedback of Population III objects on the subsequent galaxy formation to be effective in that redshift range.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available