Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...191..193b&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 191, no. 2, Feb. 1988, p. 193-200.
Astronomy and Astrophysics
Astrophysics
10
Extragalactic Radio Sources, Galaxies, Quasars, Radio Emission, Absorption Spectra, Centimeter Waves, Double Stars, H I Regions, Magnesium, Very Large Array (Vla)
Scientific paper
Results are reported from a 21-cm search for foreground-galaxy absorption in four radio-loud QSO-galaxy pairs. Data obtained using the Nancay radio telescope during 1985-1986 and the A configuration of the VLA during March-April 1986 are presented graphically and compared with optical (390-750-nm) spectroscopy and images obtained with the Faint-Object Spectrograph and camera at the Cassegrain focus of the 3.6-m telescope at ESO during September 1986. Absorption at redshifts consistent with optical detections of Na I or Ca II is found for PKS 1327 - 206 and PKS 2020 -370 and characterized in detail, but no close correlation between the absorbing-gas features in the optical and at 21 cm is observed. The present observations are shown to be in agreement with previous 21-cm emission studies with regard to the extent of the H I disks.
Bergeron Jacqueline
Boisse Patrick
Dickey John M.
Kazes Ilya
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