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Photometry of F-K type bright giants and supergiants. I - Intermediate band and H-Beta observations
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.
| Walraven photometry of nearby southern OB associations
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This paper investigates the degree of success with which uvby photometrycan be applied to predict spectral classifications for 947 A, F, and Gstars brighter than an apparent magnitude of 8.3 and with four-colorindices indicating some kind of interesting, unusual, or peculiarspectrum. One or several possible spectral classifications are estimatedfor each star from photometry alone, double stars are distinguished, andthe estimates are compared with published classifications. The resultsshow that the framework provided by uvby photometry can be extended toinclude most G and K stars, reddened stars, peculiar stars, and certaintypes of double star.
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Osservazione e dati astrometrici
| Costellazione: | Vele |
| Ascensione retta: | 10h15m48.50s |
| Declinazione: | -52°39'11.6" |
| Magnitudine apparente: | 7.801 |
| Distanza: | 271.739 parsec |
| Moto proprio RA: | -21 |
| Moto proprio Dec: | 13.7 |
| B-T magnitude: | 8.944 |
| V-T magnitude: | 7.896 |
Cataloghi e designazioni:
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INHABITED SKY
