A Very High Resolution Survey of Interstellar CH and CH +
Abstract
We report the results of a survey at very high spectral resolution of interstellar CH and CH+ in diffuse clouds toward 20 bright stars, and medium-resolution observations to determine radial velocities. The high-resolution observations [(λ/δλ) ∼ 500,000] resolve all the CH+ and all the CH lines. Most of the CH lines show multiple overlapping components at this resolution. It is often possible to associate a weak broad CH component with a CH+ component of similar radial velocity and width. The implications of these results for CH and CH+ formation scenarios are discussed.
- Publication:
-
The Astrophysical Journal Supplement Series
- Pub Date:
- July 1995
- DOI:
- 10.1086/192180
- Bibcode:
- 1995ApJS...99..107C
- Keywords:
-
- ISM: CLOUDS;
- ISM: KINEMATICS AND DYNAMICS;
- ISM: MOLECULES