Chemical equilibrium from diffuse to dense clouds. II Interstellar clouds in the Magellanic clouds

Details Chemical equilibrium from diffuse to dense clouds. II Interstellar clouds in the Magellanic clouds Chemical equilibrium from diffuse to dense clouds. II Interstellar clouds in the Magellanic clouds

May 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986a%26a...160..301b&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 160, no. 2, May 1986, p. 301-309.

Astronomy and Astrophysics

Astrophysics

16

Chemical Equilibrium, Cosmochemistry, Gas Density, Magellanic Clouds, Molecular Clouds, Abundance, Astronomical Models, Density Distribution, Energy Distribution, Milky Way Galaxy, Ultraviolet Radiation

Scientific paper

Using the chemical scheme of Viala (1985), column densities of CO, OH, Ch, NH3, H2CO, and HCO(+) molecules for interstellar clouds in the Magellanic Clouds are investigated to study the extragalactic chemistry of molecular clouds. The physical parameters of the LMC and the SMC, such as elemental abundances, grain properties, and radiation field energy densities, are first discussed. It is suggested that the observed trend of a deficiency in the molecular content of the Magellanic Clouds as compared to the Galaxy cannot be a consequence of the lower elemental abundances alone, but is also due to the lower dust content and the larger intensity of the UV radiation field in both Clouds. It is also found that in typical Galactic dark clouds, and in the LMC, provided that the equilibrium is attained, the carbon is entirely converted into CO as soon as the total hydrogen column density is of the order of 10 to the 22nd/cu cm, though a significantly larger column density is necessary in the LMC.

Affiliated with

Also associated with

No associations

Rating

Chemical equilibrium from diffuse to dense clouds. II Interstellar clouds in the Magellanic clouds does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Chemical equilibrium from diffuse to dense clouds. II Interstellar clouds in the Magellanic clouds, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Chemical equilibrium from diffuse to dense clouds. II Interstellar clouds in the Magellanic clouds will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1772123