Abstract
view Abstract Citations (29) References (26) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Interstellar lines toward the Cepheus OB2 association. Chaffee, F. H., Jr. ; Dunham, T., Jr. Abstract Results are presented for an analysis of the interstellar-line spectra of four stars in the Cepheus OB2 association. The cloud has strong lines of both Ca II and Ca I, and electron number densities are determined directly from the N(Ca I)/N(Ca II) ratio. The depletions of Ca and Ti are found to be less than in typical diffuse interstellar clouds, and it is suggested that these metals have been released from the grains in the cloud - a suggestion supported by the observed shorter wavelength of maximum interstellar polarization toward the cloud. Copernicus observations of Lambda Cep, one of the program stars, reveal the presence of large column densities of both molecular and atomic hydrogen commensurate with the observation of strong lines of CH, CH(+), and CN. Publication: The Astrophysical Journal Pub Date: October 1979 DOI: 10.1086/157417 Bibcode: 1979ApJ...233..568C Keywords: Interstellar Matter; Interstellar Radiation; Line Spectra; Stellar Spectra; Abundance; B Stars; Calcium; Electron Density (Concentration); Nebulae; O Stars; Astrophysics; Interstellar Clouds:Metal Abundances; Interstellar Lines:Stellar Associations; Interstellar Molecules full text sources ADS | data products SIMBAD (5) MAST (1)
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