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A photometric study of the bright cloud B in Sagittarius. VI - 1592 new variable stars and 30 diffuse objects
Abstract image available at:http://adsabs.harvard.edu/abs/1988A&AS...76..205T
| A catalogue of M type stars
The catalogue of 2116 M type and 17 other type stars, carbon stars, Stype stars, and Wolf-Rayet stars, is prepared for the galactic centerregion between 1 = 351 and 1 deg, and between b = -2 and +2 deg. Thecompleteness of the survey down to the limiting magnitude for detectableM type stars is about 90 percent for early (M2-M4) subclasses, and 99percent for intermediate (M5-M6) and late (M6.5-M8) subclasses. Thespectral classification of the M type stars detected is made accordingto the Case system. The accuracy of the positional data for each star iswithin 1.5 sec of arc. Apparent magnitudes in the I and R bands arepresented with an accuracy of + or - 0.3 mag. The limiting magnitude isabout 12.0 in the I band for early M type subclasses and about 12.5 forboth intermediate and late type subclasses. It is suggested that thecatalogue is useful for statistical studies of the galactic structureand further studies on the properties of the stars.
| A catalogue of galactic clusters observed in three colours
This catalogue contains photometric data for 190 galactic clusters, allobserved in UBV or RGU. The distances of the young clusters (with spless than b3) have been calculated or recalculated according to method Aof Becker (1963). The galactic distribution of these clusters confirmstheir role of being good spiral tracers.
| Space Distribution of Early Type Stars in a Southern Milky Way Region
Abstract image available at:http://adsabs.harvard.edu/abs/1976A&A....50...11P
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