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A homogeneous catalog of new UBV and H-beta photometry of B- and A-type stars in and around the Scorpius-Centaurus OB association
B- and A-type stars in and near the Sco-Cen OB association areinvestigated with UBV and H-beta photometry to acquire data relevant tothe luminosity function of Sco-Cen. The measurements generally consistof two 10-s integrations of U, B, V, (W, N) filters, and theobservations are corrected iteratively for atmospheric extinction andinstrumental response. The data presented give the mean V magnitude,mean B-V, mean U-B, and the estimated uncertainties for these values.The catalog provides a homogeneous catalog of data for a large fieldwith stellar objects delineating membership to the association Sco-Cenand that affect the luminosity function of the aggregate.
| Spectrophotometry in the upper Scorpius region
The low dispersion spectrophotometric measures of 29 stars in the upperScorpius region, made from 1964 to 1969 with an old-type spectrumscanner, employing a 91 cm telescope with a 60 A slit, are examined.Equivalent widths of H-beta, H-gamma, and H-delta are measured alongwith the size of the Balmer discontinuity, the gradients in theultraviolet and the blue-green-yellow parts of the spectrum. The resultsof the intensity distributions, the spectral intensity distributions,and some measured quantities are presented in tabulated form.
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Osservazione e dati astrometrici
| Costellazione: | Scorpione |
| Ascensione retta: | 16h16m22.94s |
| Declinazione: | -25°03'46.7" |
| Magnitudine apparente: | 8.404 |
| Distanza: | 245.7 parsec |
| Moto proprio RA: | -12.4 |
| Moto proprio Dec: | -25.6 |
| B-T magnitude: | 8.74 |
| V-T magnitude: | 8.432 |
Cataloghi e designazioni:
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