Physics
Scientific paper
Oct 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...241..161s&link_type=abstract
Astrophysical Journal, Part 1, vol. 241, Oct. 1, 1980, p. 161-172.
Physics
60
Cloud Physics, Far Ultraviolet Radiation, Interstellar Extinction, Molecular Clouds, Abundance, Graphs (Charts), Tables (Data)
Scientific paper
Copernicus ultraviolet data on six stars embedded in the well-studied Rho Ophiuchi cloud complex have been analyzed for interstellar abundances, densities, and far-ultraviolet extinction parameters, in an effort to determine how interstellar depletions depend on physical conditions. While there are variations within the cloud in the overall depletions, the pattern of depletions from element to element is constant for all six lines of sight. A picture is suggested in which the cloud core has a small velocity dispersion or is either so strongly depleted or so dense (hence not ionized) that the lines of first ions of heavy elements do not arise there, but rather form in a less-dense or less-depleted outer region. The cloud as a whole has substantial depletions, average to low far-ultraviolet extinction, and a low ratio of molecular to atomic hydrogen.
Jenkins Edward B.
Snow P. Jr. Th.
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