Astronomy and Astrophysics – Astrophysics
Scientific paper
1997-09-15
Astronomy and Astrophysics
Astrophysics
16 pages, 7 figures, Accepted for publication in ApJ
Scientific paper
10.1086/305701
New millimeter wave observations of the molecular absorption line system in the gravitational lens to PKS1830-211 at z=0.88582 is presented. Self-calibrated interferometer data shows unequivocally that the previously detected absorption component is associated with the gravitationally lensed south-west image of the background source. A second absorption line of HCO+(2-1) at z=0.88582 is detected. This component is shifted in velocity by -147 km/s relative to the main absorption line, and is shown to be associated with the north-east image. These two absorption lines are used to constrain the mass of the lensing galaxy. Upper limits to absorption and emission lines from the possible absorption system at z=0.1927, seen in 21cm HI by Lovell et al, are reported.
Combes Francoise
Wiklind Tommy
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