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Investigations of Stephenson's Hα stars
Hitherto unstudied objects from Stephenson's list of Hα emissionline objects at high galactic latitude were observed spectroscopicallyto prove their nature. 9 out of 11 objects show Hα in emission.Spectroscopy combined with photometric information indicates most ofthem being classical Be stars, while one object is a Post-AGB star andone a T-Tauri star. The classification of two objects, which are showingHα in emission, is unclear.
| New H-alpha emission stars found above 10 deg galactic latitude
Approximately 1300 5.2 x 5.2 deg red-sensitive objective prism plateshave been searched for H-alpha emission stars in order to complete thesearch of the entire sky. The survey here reported represents 59 percentof the whole sky, defined by the region north of declination -25 deg andmostly further than 10 deg from the Galactic plane; the omitted portionshad already been surveyed, in part at Warner and Swasey, in partelsewhere. Two hundred and six stars have been newly found, mostly ofunknown spectral type. The stars' latitude distribution suggests thatthey are mainly moderately high luminosity disk population stars. Thereare new finds especially in Orion and the Taurus dark clouds (limitingmag of about 13).
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Osservazione e dati astrometrici
| Costellazione: | Cavallino |
| Ascensione retta: | 21h05m03.11s |
| Declinazione: | +02°32'47.1" |
| Magnitudine apparente: | 7.726 |
| Moto proprio RA: | 4.6 |
| Moto proprio Dec: | -20.5 |
| B-T magnitude: | 7.649 |
| V-T magnitude: | 7.72 |
Cataloghi e designazioni:
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