Depletion of elements in the interstellar medium

Details Depletion of elements in the interstellar medium Depletion of elements in the interstellar medium

Jun 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985apj...293..230g&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 293, June 1, 1985, p. 230-235.

Astronomy and Astrophysics

Astrophysics

11

Abundance, Gas Density, Hydrogen Clouds, Interstellar Gas, Interstellar Matter, Absorption Spectra, Chlorine, Depletion, Titanium

Scientific paper

The abundances of both refractory and volatile elements in the interstellar medium (ISM) are correlated with the density of neutral hydrogen in the clouds in the ISM. The density of neutral hydrogen in the clouds is determined from the population of excited fine-structure levels of neutral carbon. The correlation between abundances and density of neutral hydrogen in the clouds and the lack of correlation between depletion and dust density suggests that, in the gas phase of the ISM, the abundances of elements are determined by the shielding of grains in the interstellar clouds. There is little or no grain formation in the ISM.

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