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Új cikk hozzáadása| Membership of low-mass stars in the open cluster Alpha Persei The results of a combined astrometric, photometric, and spectroscopicsearch for low-mass members in the intermediate-age open cluster AlphaPersei are presented. Over 130 low-mass new members have been identifiedto M(v) about 12.5, almost doubling the previous number of knownmembers. The new membership information suggests a slight upwardrevision of Alpha Per's age to about 8 x 10 exp 7 yr. Alpha Per isnoticeably spatially elongated in a direction parallel to the Galacticplane, most likely due to tidal deformation. Analysis of thedistribution of relative H-alpha emission strengths among Alpha Permembers confirms the view that the mean H-alpha strength decreases inincreasingly older systems. Allowing for survey incompleteness, onecannot reject the idea that the luminosity function is consistent withthe field luminosity function to M(v) about 9 or 10.
 
 
 |  | Uvby-Beta Photometry for 67 Stars in the Region of Alpha-Persei Abstract image available at:http://adsabs.harvard.edu/abs/1989A&AS...81...47T
 
 
 |  | Eigenbewegungen in der Umgebung von α Persei Not Available
 
 
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| Csillagkép: | Perszeusz |  | Rektaszcenzió: | 03h32m31.89s |  | Deklináció: | +51°29'22.6" |  | Vizuális fényesség: | 10.293 |  | RA sajátmozgás: | 21 |  | Dec sajátmozgás: | -22.6 |  | B-T magnitude: | 11.019 |  | V-T magnitude: | 10.353 |  Katalógusok és elnevezések:
 
 
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