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Young, high-velocity stars. I - Rotational velocities and a catalog of early-type stars at the South Galactic Pole
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| Young, high-velocity a stars. II - Misidentified, ejected, or unique?
The ages, abundances, and kinematics of a large number of early-typestars at the south Galactic pole are derived to examine the properties,augment the sample of high-velocity stars, and study hypothesesconcerning their origin. The results are compared to a group of normal Astars near the disk. It is suggested that at around 6.5 X 10 to the 8thyr ago, a major source of relatively low abundance hydrogen was accretedby the Galactic disk, forming young high-velocity stars that do notpartake of the age-abundance-kinematics relationships shown by otherstellar groupings.
| Hyades and Sirius supercluster members brighter than magnitude(V) 7.1. I - The first six hours of right ascension
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Membro dei seguenti gruppi:
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Osservazione e dati astrometrici
| Costellazione: | Balena |
| Ascensione retta: | 00h20m48.58s |
| Declinazione: | -23°37'48.8" |
| Magnitudine apparente: | 6.759 |
| Distanza: | 155.763 parsec |
| Moto proprio RA: | 5.2 |
| Moto proprio Dec: | 1.4 |
| B-T magnitude: | 7.128 |
| V-T magnitude: | 6.79 |
Cataloghi e designazioni:
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