J. Michael Shull , Steven V. Penton , John T. Stocke, PASA, 16 (1), 95
The html and gzipped postscript versions of this paper are in preprint form.
To access the final published version, download the pdf file.
Next Section: Introduction | Contents Page: Volume 16, Number 1 |
The Low-Redshift Intergalactic Medium
J. Michael Shull 1,2
Steven V. Penton 1
John T. Stocke 1
1 Center for Astrophysics and Space Astronomy, Dept. of Astrophysical and Planetary Sciences, CB-389, University of Colorado, Boulder, CO 80309 (USA)
2 also at JILA, University of Colorado and NIST, Boulder, CO 80309, mshull@casa.colorado.edu
Abstract:
cm-2 along 11 sightlines covering pathlength
km s-1 show
and a line frequency
for
NHI > 1012.6 cm-2 (one every 1500 km s-1 of redshift). A group of strong absorbers toward PKS 2155-304 may be associated with gas
(400-800)h75-1 kpc from 4 large galaxies, with low metallicity ( solar) and D/H
. At low-z, we derive a metagalactic ionizing radiation field from AGN of
J0 = 1.3+0.8-0.5 x 10-23 ergs cm-2 s-1 Hz-1 sr-1 and a Ly-forest baryon density
for clouds of characteristic size
.
© Copyright Astronomical Society of Australia 1997