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Pulkovo compilation of radial velocities for 35495 stars in a common system.
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| Photometry of F-K type bright giants and supergiants. I - Intermediate band and H-Beta observations
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An empirical calibration of the Stromgren uvby-beta photometric systemfor the A, F, and early G supergiants is being derived. This paperexplains the observational program and the photometric reductiontechniques used and presents a catalog of new Stromgren photometry forover 600 A, F, and G supergiants.
| Cepheids and nonvariable supergiants
Photometric parameters for Cepheids in a previous paper are adapted foruse with nonvariable supergiants of similar temperature. The closecorrelation between the abundance and luminosity parameters forclassical, short-period Cepheids (SPC) confirms the nearlydispersionless luminosity temperature relation for these variables. Theassumptions that (1) the C-type variables are transiting the Cepheidtemperature for the first time, (2) the classical SPC are mostlytransiting for the second time, and (3) the long-period Cepheids (LPC)are a mixture of stars transiting for the first to third or fourth timesare found to be consistent with the various correlations of temperatureand luminosity parameters. The nonvariable supergiants with photometricparameters similar to those for the Cepheids are found to haveluminosities consistent with their spectroscopic luminosity class. Few,if any, nonvariable supergiants have temperatures and luminositiessimilar to the LPC.
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Osservazione e dati astrometrici
| Costellazione: | Altare |
| Ascensione retta: | 16h39m50.67s |
| Declinazione: | -47°06'24.1" |
| Magnitudine apparente: | 8.608 |
| Distanza: | 1315.789 parsec |
| Moto proprio RA: | -3.1 |
| Moto proprio Dec: | -5.5 |
| B-T magnitude: | 10.251 |
| V-T magnitude: | 8.744 |
Cataloghi e designazioni:
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