Population of excited rotational levels of interstellar H2

Details Population of excited rotational levels of interstellar H2 Population of excited rotational levels of interstellar H2

Sep 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975ap%26ss..36..281j&link_type=abstract

Astrophysics and Space Science, vol. 36, Sept. 1975, p. 281-289.

Astronomy and Astrophysics

Astrophysics

4

Electron Transitions, Hydrogen Clouds, Interstellar Gas, Molecular Excitation, Molecular Rotation, Absorption Cross Sections, Abundance, Gas Density, Ground State, Molecular Collisions, Molecular Oscillations, Thermodynamic Equilibrium

Scientific paper

The population of the rotational levels of vibrational and electronic ground state of interstellar H2 has been calculated; different possible excitation and dc-excitation mechanisms in- cluding the ultraviolet pumping and formation and destruction of molecules have been considered. The values of temperature, density and radiation field towards ~ Oph, ~ Per and ~ Pup have been obtained by comparing the theoretical distributions with the observations. The results indicate the presence of a high temperature low density diffuse cloud towards ~ Pup and low temperature high density clouds towards ~ Oph and & Per. The results of this work were presented at the February, 1974 meeting of the Astronomical Society of India (Joshi and Tarafdar, 1974)

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