Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985apj...292...58a&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 292, May 1, 1985, p. 58-71. Research supported by the Radcliffe Trust and S
Astronomy and Astrophysics
Astrophysics
112
Absorption Spectra, Intergalactic Media, Lyman Spectra, Molecular Clouds, Quasars, Red Shift, Adiabatic Conditions, Heavy Elements, Velocity Distribution
Scientific paper
The spectral resolution of the results of the present analysis of absorption lines from an echelle spectrum of the z = 3.12 quasar Q0420-388 is sufficiently high to resolve most of the Lyman absorption lines, allowing velocity dispersions and column densities to be obtained by profile fitting. By comparing the properties of the Lyman absorption systems at redshifts of about 2 with those at about 3, it is noted that there is no evidence for redshift evolution in the distribution function of any measured quantity. Simple models in which a hot intergalactic medium pressure confined a comoving population of clouds are consistent with the available data, if the clouds are nearly in thermal and ionization balance with the ionizing background flux from quasars.
Atwood Bill
Baldwin John A.
Carswell Robert F.
No associations
LandOfFree
Redshift evolution of the Lyman-line-absorbing clouds in quasar spectra 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 Redshift evolution of the Lyman-line-absorbing clouds in quasar spectra, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Redshift evolution of the Lyman-line-absorbing clouds in quasar spectra will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1631112