Cosmological H II regions and the photoionization of the intergalactic medium

Details Cosmological H II regions and the photoionization of the intergalactic medium Cosmological H II regions and the photoionization of the intergalactic medium

Oct 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...321l.107s&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 321, Oct. 15, 1987, p. L107-L112. Research supporte

Statistics

Computation

198

Cosmology, H Ii Regions, Intergalactic Media, Photoionization, Quasars, Stellar Coronas, Computational Astrophysics, Ionizing Radiation, Red Shift, Universe

Scientific paper

The classical H II region problem is generalized to treat the case of a point ionizing-radiation source in a gas expanding cosmologically in a Friedmann-Robertson-Walker universe, applying a cosmological generalization of the static Stromgren radius to obtain the time dependence of the radius and peculiar velocity of the source ionization front. Numerical results are presented graphically and characterized in detail. It is shown that the number and luminosity of the observed high-redshift quasars is insufficient to photoionize enough of the low-density intergalactic medium to satisfy the Gunn-Peterson test for neutral H atoms at z greater than 3.5.

Affiliated with

Also associated with

No associations

Rating

Cosmological H II regions and the photoionization of the intergalactic medium 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 Cosmological H II regions and the photoionization of the intergalactic medium, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cosmological H II regions and the photoionization of the intergalactic medium will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1773897