H2 in the Galaxy
N. Z. Scoville, D. B. Sanders;
In Interstellar processes, 1987, Grand Teton National Park, WY, Dordrecht, D. Reidel , D. J. Hollenbach and H. A. Thronson, p. 21

ABSTRACT:Molecular clouds are the active, star forming component of the interstellar medium. The article reviews the theoretical and empirical basis for using the 2.6 mm CO emission line as a tracer of H2 and summarizes the Galactic distribution and properties of the molecular clouds. All quantitative estimates are reduced to the recent IAU adopted value of R(o) = 8.5 kpc.
KEYWORDS: h ii regions, hydrogen clouds, interstellar chemistry, interstellar gas, molecular clouds, carbon monoxide, mass distribution, molecular spectra, spatial distribution
CODE: scoville87