[HTML][HTML] On the CH (+) ion in diffuse interstellar clouds
DL Lambert, AC Danks�- …�Journal, Part 1 (ISSN 0004-637X), vol�…, 1986 - adsabs.harvard.edu
A survey of 65 lines of sight in the southern Milky Way for the interstellar line of CH (+) at
4232 A yielded 30 detections. The CH (+) column density N (CH+) is shown to be well
correlated with the rotationally excited H2 detected by surveys with the Copernicus satellite:
log N (CH+)/N (H2) ex inversely proportional to 2500/T (ex), where T (ex) is the excitation
temperature of H2 provided by the observed populations in rotational levels J of about 3-5.
This correlation is strong evidence that CH (+) is formed in warm gas where the reaction C�…
4232 A yielded 30 detections. The CH (+) column density N (CH+) is shown to be well
correlated with the rotationally excited H2 detected by surveys with the Copernicus satellite:
log N (CH+)/N (H2) ex inversely proportional to 2500/T (ex), where T (ex) is the excitation
temperature of H2 provided by the observed populations in rotational levels J of about 3-5.
This correlation is strong evidence that CH (+) is formed in warm gas where the reaction C�…