The interstellar media in the Scorpius-Ophiuchus region

Details The interstellar media in the Scorpius-Ophiuchus region The interstellar media in the Scorpius-Ophiuchus region

Jul 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984esasp.218..167p&link_type=abstract

In ESA Fourth European IUE Conf. p 167-173 (SEE N84-35135 24-88)

Computer Science

Abundance, Interstellar Chemistry, Interstellar Extinction, Stellar Spectra, Depletion, Iue, Line Of Sight, Ultraviolet Spectra

Scientific paper

Lines of sight from stars in the Sco-Oph complex are analyzed. Data are high resolution IUE spectra with visual and 21 cm radio observations. Abundances are compared to solar values. Zinc proves to be a good metallicity tracer since it is only depleted by a factor of 2; P and Cl are slightly depleted; Mg, Si and Fe are depleted by 0.04 to 0.08. The most severely depleted are Ni, Cr and Al, at 0.003. Carbon monoxide is well observed in one of the stars in isotopes C12O and C13O. Their respective column densities are 14.5 and 13.4 (logarithmically), giving a low isotope ratio of 11. Using ionization equilibria electron densities are computed. It is found that ne varies from 0.02 to 0.20. From excitation balance total particle density in the neutral cloud of 1.5 to 2.2 is derived.

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