Cecchi-Pestellini, C.Dalgarno, Alexander2020-05-262000Cecchi-Pestellini, C., and A. Dalgarno. 2000. H3+ in Diffuse Interstellar Gas. Monthly Notices of the Royal Astronomical Society 313, no. 1 (March 21): L6–L8.0035-8711http://nrs.harvard.edu/urn-3:HUL.InstRepos:42668767A model is constructed of the material in front of the star Cygnus OB2 no. 12 in which dense cores are embedded in diffuse clumps of gas. The model reproduces the measured abundances of Graphic C2 and CO, and predicts a column density of 9×1010 cm−2 for HCO+.en-USmolecular processesISM: cloudsISM: moleculesJournal Article2020-05-2610.1046/j.1365-8711.2000.03320.x