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A photometric and spectroscopic search for luminous high latitude stars
Formulas, derived by Arellano Ferro and Mendoza in Paper I (1993), tocalculate Mv, log g, and (Fe/H) were applied to a group of 73A, F, and G stars of high galactic latitude previously classified assupergiant stars. The only star that showed, from data on hand, to beluminous, slightly iron deficient, and out of the galactic plane was BLTelescopii. The remainder of the sample either present controversialresults or are definitively giant or dwarf stars misclassified assupergiants. Thus, if luminous, young stars indeed exist out of thegalactic plane, they are extremely rare.
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Over 1500 observations of 560 bright giants and supergiants of types F-Kare presented and compared to the observations by Gray and Olsen (1991).The present results include intermediate-band which is slightlydifferent from the Stromgren data by Gray and Olsen due to a differentwidth for the v filter. A systematic difference in m(1) - M(1) withdecreasing temperature is noted in the two H-Beta data sets, and thecorrelations are defined.
| The calibration of the Stromgren photometric system for A, F and early G supergiants. I - The observational data
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Datos observacionales y astrométricos
| Constelación: | Popa |
| Ascensión Recta: | 06h41m50.04s |
| Declinación: | -49°23'10.1" |
| Magnitud Aparente: | 8.638 |
| Distancia: | 221.239 parsecs |
| Movimiento Propio en Ascensión Recta: | 3 |
| Movimiento Propio en Declinación: | 26.9 |
| B-T magnitude: | 9.095 |
| V-T magnitude: | 8.676 |
Catálogos y designaciones:
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