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Pulkovo compilation of radial velocities for 35495 stars in a common system.
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| New Estimates of the Solar-Neighborhood Massive Star Birthrate and the Galactic Supernova Rate
The birthrate of stars of masses >=10 Msolar is estimatedfrom a sample of just over 400 O3-B2 dwarfs within 1.5 kpc of the Sunand the result extrapolated to estimate the Galactic supernova ratecontributed by such stars. The solar-neighborhood Galactic-plane massivestar birthrate is estimated at ~176 stars kpc-3Myr-1. On the basis of a model in which the Galactic stellardensity distribution comprises a ``disk+central hole'' like that of thedust infrared emission (as proposed by Drimmel and Spergel), theGalactic supernova rate is estimated at probably not less than ~1 normore than ~2 per century and the number of O3-B2 dwarfs within the solarcircle at ~200,000.
| Catalog of Galactic OB Stars
An all-sky catalog of Galactic OB stars has been created by extendingthe Case-Hamburg Galactic plane luminous-stars surveys to include 5500additional objects drawn from the literature. This work brings the totalnumber of known or reasonably suspected OB stars to over 16,000.Companion databases of UBVβ photometry and MK classifications forthese objects include nearly 30,000 and 20,000 entries, respectively.
| A Finding List of Faint UV-bright Stars in the Galactic Plane. IV.
One hundred fifty-five UV-bright stars have been identified on threetwo-color 48 inch (1.2 m) Oschin Schmidt plates as part of thecontinuing examination of Sandage survey plates centered on the Galacticplane. The three 6.6dx6.6d field plates examined were centered atGalactic longitude (l) and latitude (b) coordinates of (123, -6), (141,0), and (148, 0), respectively. The sources identified range in U-Bcolor from near U-B~-0.1 to U-B~-1.2, and in magnitude from m_B~10 to~20. Some potentially interesting sources are discussed, and findingcharts are provided for all UV sources listed. Correlations withpreviously identified objects in the literature are also provided.
| UBV beta Database for Case-Hamburg Northern and Southern Luminous Stars
A database of photoelectric UBV beta photometry for stars listed in theCase-Hamburg northern and southern Milky Way luminous stars surveys hasbeen compiled from the original research literature. Consisting of over16,000 observations of some 7300 stars from over 500 sources, thisdatabase constitutes the most complete compilation of such photometryavailable for intrinsically luminous stars around the Galactic plane.Over 5000 stars listed in the Case-Hamburg surveys still lackfundamental photometric data.
| Vitesses radiales. Catalogue WEB: Wilson Evans Batten. Subtittle: Radial velocities: The Wilson-Evans-Batten catalogue.
We give a common version of the two catalogues of Mean Radial Velocitiesby Wilson (1963) and Evans (1978) to which we have added the catalogueof spectroscopic binary systems (Batten et al. 1989). For each star,when possible, we give: 1) an acronym to enter SIMBAD (Set ofIdentifications Measurements and Bibliography for Astronomical Data) ofthe CDS (Centre de Donnees Astronomiques de Strasbourg). 2) the numberHIC of the HIPPARCOS catalogue (Turon 1992). 3) the CCDM number(Catalogue des Composantes des etoiles Doubles et Multiples) byDommanget & Nys (1994). For the cluster stars, a precise study hasbeen done, on the identificator numbers. Numerous remarks point out theproblems we have had to deal with.
| On the behaviour of the lines 2905 SI II and 2932 MG II in the spectra of B-A stars
Using Orion-2 observational data, it is shown that the ratio of theintensities of absorption lines 2905 (2904+2906) Si II and 2932(2928+2936) Mg II varies strongly when moving from B0 stars to A0 stars.It is shown that this phenomenon may be used as a sensitive indicatorfor determining the effective temperature of hot stars.
| 21-cm observations of nonplanar H I associated with the Perseus spiral arm
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1977AJ.....82..886G&db_key=AST
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Dades d'Observació i Astrometria
| Constel·lació: | Cassiopeia |
| Ascensió Recta: | 00h49m02.98s |
| Declinació: | +58°25'45.5" |
| Magnitud Aparent: | 9.131 |
| Moviment propi RA: | -2.1 |
| Moviment propi Dec: | 1.2 |
| B-T magnitude: | 9.221 |
| V-T magnitude: | 9.139 |
Catàlegs i designacions:
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