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TYC 3324-757-1


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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.

Measurements of 258 radial velocities in two fields near Alpha Per
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1987A&AS...68..515F&db_key=AST

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Osservazione e dati astrometrici

Costellazione:Perseo
Ascensione retta:03h25m22.66s
Declinazione:+50°47'39.4"
Magnitudine apparente:10.301
Moto proprio RA:8.6
Moto proprio Dec:-18.1
B-T magnitude:10.84
V-T magnitude:10.346

Cataloghi e designazioni:
Nomi esatti   (Edit)
TYCHO-2 2000TYC 3324-757-1
USNO-A2.0USNO-A2 1350-03418590
HIPHIP 15950

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