Two populations of diffuse molecular clouds

Abstract

view Abstract Citations (48) References (20) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Two Populations of Diffuse Molecular Clouds Lada, Elizabeth A. ; Blitz, Leo Abstract The authors observed 16 diffuse clouds and eight high-latitude molecular clouds in the J = 2-1 transition of CO and 13CO and compared their properties. Results suggest that the diffuse clouds are not a homogeneous population of molecular clouds but can be divided into two groups depending on the column density of CO. One group consists of "CO-poor" clouds with N(CO) < 4×1014cm-2 and N(CO)/N(H) < 10-6. The other consists of "CO-rich" clouds with mean N(CO) = 4.2×1016cm-2 and N(CO)/N(H) ≈ 1.7×10-5. The high-latitude clouds resemble the CO-rich diffuse clouds. Publication: The Astrophysical Journal Pub Date: March 1988 DOI: 10.1086/185125 Bibcode: 1988ApJ...326L..69L Keywords: Carbon Monoxide; Chemical Composition; Interstellar Chemistry; Molecular Clouds; Abundance; Hydrogen; Interstellar Extinction; Astrophysics; INTERSTELLAR: ABUNDANCES; INTERSTELLAR: MOLECULES full text sources ADS | data products SIMBAD (24)