5 papers
The covering factor of high redshift damped Lyman- systems
N. Kanekar, W. M. Lane, E. Momjian +2
We have used the Very Long Baseline Array to image 18 quasars with foreground damped Lyman- systems (DLAs) at 327, 610 or 1420 MHz, to measure the covering factor of each DL…
Did VV~29 collide with a dark Dark-Matter halo?
F. H. Briggs, O. Moller, J. L. Higdon +2
Westerbork Radio Synthesis Telescope observation of the galaxy VV29=Arp188=UGC10214 shows that there are at least three distinct dynamical components whose kinematics can be traced…
Two New Low Redshift 21cm Absorbers
W. M. Lane, F. H. Briggs
As part of a larger program to identify low redshift radio analogues of the damped Lyman-alpha (DLA) absorbers seen in the spectra of high redshift quasars, Westerbork Synthesis Ra…
Detection of Warm and Cold Phases of the Neutral ISM in a Damped Ly-alpha Absorber
W. M. Lane, F. H. Briggs, A. Smette
We present a detailed study of the HI 21cm absorption system at z=0.0912 towards the radio quasar B0738+313. The uncommonly narrow main absorption line and weak secondary line are…
HI 21cm absoprtion in two low redshift damped Ly-alpha systems
W. Lane, A. Smette, F. Briggs +3
We report the discovery of two low redshift HI 21cm absorbers, one at z = 0.2212 towards the z_{em} = 0.630 quasar OI 363 (B0738+313), and the other at z = 0.3127 towards PKS B1127…