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Radial velocities of early-type stars in the Perseus OB2 association
We present radial velocities for 29 B- and A-type stars in the field ofthe nearby association Perseus OB2. The velocities are derived fromspectra obtained with AURELIE, via cross correlation with radialvelocity standards matched as closely as possible in spectral type. Theresulting accuracy is ~ 2-3 km s-1. We use thesemeasurements, together with published values for a few other early-typestars, to study membership of the association. The mean radial velocity(and measured velocity dispersion) of Per OB2 is 23.5 +/- 3.9 kms-1, and lies ~ 15 km s-1 away from the meanvelocity of the local disk field stars. We identify a number ofinterlopers in the list of possible late-B- and A-type members which wasbased on Hipparcos parallaxes and proper motions, and discuss thecolour-magnitude diagram of the association.Based on observations made at the Observatoire de Haute-Provence (CNRS),France.
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| The observed periods of AP and BP stars
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| 58th Name-List of Variable Stars
Not Available
| Light Variations in Magnetic Stars
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1972ApJ...171..569T&db_key=AST
| The Nature of the Variability of HD 19216
Not Available
| Photometric behavior of magnetic stars
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1968ApJ...154..945S&db_key=AST
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Osservazione e dati astrometrici
| Costellazione: | Perseo |
| Ascensione retta: | 03h06m32.20s |
| Declinazione: | +33°37'30.9" |
| Magnitudine apparente: | 7.818 |
| Distanza: | 207.9 parsec |
| Moto proprio RA: | 11.5 |
| Moto proprio Dec: | -7.2 |
| B-T magnitude: | 7.852 |
| V-T magnitude: | 7.821 |
Cataloghi e designazioni:
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