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Large and kinematically unbiased samples of G and K type stars. I - The dwarfs
Four-color, H-beta, and (R,I) photometry for the little-evolvedmain-sequence stars from the Bright Star Catalogue, South Galactic Pole,Griffin (1971), and Moore-Paddock-Wayman (Moore and Paddock 1950, andWayman 1960) samples are analyzed. The luminosity and heavy-elementabundances for these stars are calculated in terms of the Hyadessupercluster, the Wolf 630 group, the Sirius supercluster, and theKapteyn star group. The data reveal the presence of a metal-abundancedependent discontinuity near M(v) = +7 mag in the photometric parametersof dwarfs. The distributions of the abundances and the space motions ofthe sample stars are discussed.
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Gözlemler ve gökölçümü verileri
| Takýmyýldýz: | Yontar |
| Sað Açýklýk: | 00h50m59.25s |
| Yükselim: | -30°21'57.1" |
| Görünürdeki Parlaklýk: | 10.439 |
| özdevim Sað Açýklýk: | -55.5 |
| özdevim Yükselim: | -48.5 |
| B-T magnitude: | 11.169 |
| V-T magnitude: | 10.5 |
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