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Distribution of OB stars and absorbing matter in the region around P CYG
The results of spectrophotometric observations of 277 OB stars in a 7 x7-deg region around P Cyg, obtained in 8-sec, 45-sec, and 8-minexposures on ORWO ZU-21 plates with a 4-deg 272-A/mm-dispersionobjective prism on the 40-in. Schmidt telescope at BiurakanAstrophysical Observatory on October 14-19, 1979, are presented intables and graphs and characterized. Data reported include 400-480-nmabsolute spectrophotometric gradients, color excesses, and distances. Itis found that concentrations of OB stars with associated absorbingmatter exist toward the associations Cyg OB9 (two concentrations at 800and 1800 pc), Cyg OB3 (three concentrations at 1.4, 2.5, and 3.7 kpc),OB1 (at 1.6 kpc), Cyg OB8 (at 1.5 kpc), and over the entire observedregion at a distance of about 500 pc.
| Intermediate-band photometry of late-type stars. VI - Main-sequence stars near the sun. VII - The HR 1614 group of overabundant stars
Intermediate-band photometry of a complete sample of dwarfs in the solarneighborhood has been undertaken. The photometry of the main-sequencestars is employed to determine the space velocity and metal abundancedistribution near the sun. In comparison with Hyades stars, 12% of thespecimens are overabundant, with the largest percentage, 39%, havingabout one-half the solar abundance. Old disk dwarfs of type G, which maybe given the spectroscopic classification of mild CH in some extremecases, are given particular attention. The multiple system Herschel2621, which may prove important for understanding advanced evolutionaryprocesses, is also discussed.
| Structure de la galaxie dans la région de P Cygni
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| Stellar Spectra and Colors in a Clear Region in Cygnus.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1949ApJ...110..478N&db_key=AST
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