Interstellar abundances in the Zeta Ophiuchi clouds

Details Interstellar abundances in the Zeta Ophiuchi clouds Interstellar abundances in the Zeta Ophiuchi clouds

Apr 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...229..545s&link_type=abstract

Astrophysical Journal, Part 1, vol. 229, Apr. 15, 1979, p. 545-552.

Astronomy and Astrophysics

Astrophysics

29

Abundance, Astronomical Spectroscopy, Interstellar Matter, Nebulae, O Stars, Ultraviolet Spectra, Absorption Spectra, Density (Mass/Volume), Hydrogen Clouds, Iron, Magnesium, Manganese, Metal Ions, Oao 3, Phosphorus

Scientific paper

The velocity component structure of UV interstellar absorption line profiles observed toward Zeta Ophiuchi clouds has been analyzed; column densities of Mg II, P II, Mn II and Fe II are found for the clouds at -14.4 km/sec (the principal component) and those at about -30 km/sec (a blend of two components). Little or no depletion is noted in the secondary component, suggesting that the grain mantles have been sputtered off, perhaps by a shock front, in this moderately high-velocity cloud. Residual depletion of calcium and titanium in the shocked cloud provides information on the nature of the grain surfaces. In the low-velocity cloud, the relative abundances of neutral atoms may indicate a differential depletion within the cloud.

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