The Complex Molecular Absorption Line System at Z = 0.886 toward PKS 1830-211
Abstract
New single-dish and millimeter wave interferometer observations of the molecular absorption line system in the gravitational lens to PKS 1830-211 at z = 0.88582 are presented. Self-calibrated interferometer data show unequivocally that the previously detected absorption component is associated with the gravitationally lensed southwest 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-1 relative to the main absorption line and is shown to be associated with the northeast image. A few additional absorption lines are presented. Upper limits to absorption and emission lines from the possible absorption system at z = 0.1927, seen in 21 cm H I by Lovell et al., are reported. Alternatively, there could be only one absorbing system at z = 0.88582, with the H I line attributed instead to the PS molecule.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- June 1998
- DOI:
- 10.1086/305701
- arXiv:
- arXiv:astro-ph/9709141
- Bibcode:
- 1998ApJ...500..129W
- Keywords:
-
- ISM: MOLECULES;
- GALAXIES: BL LACERTAE OBJECTS: INDIVIDUAL ALPHANUMERIC: PKS 1830-211;
- GALAXIES: ABUNDANCES;
- GALAXIES: ISM;
- GALAXIES: QUASARS: ABSORPTION LINES;
- COSMOLOGY: GRAVITATIONAL LENSING;
- ISM: Molecules;
- Galaxies: BL Lacertae Objects: Individual: Alphanumeric: PKS 1830-211;
- Galaxies: Abundances;
- Galaxies: ISM;
- Cosmology: Gravitational Lensing;
- Galaxies: Quasars: Absorption Lines;
- Astrophysics
- E-Print:
- 16 pages, 7 figures, Accepted for publication in ApJ