FOUR-COLOR AND Hβ PHOTOMETRY FOR OPEN CLUSTERS I. NGC 2516

Extensive uvby and Hβ photometry was obtained for stars in the region of the open cluster NGC 2516. A photometric analysis revealed variable reddening and a mean reddening of E(b— y) = 0ṃ088. In addition to determining a new age of 137 × 10₆ years and a new adopted distance modulus of 8ṃ01, several...

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Bibliographic Details
Published inPublications of the Astronomical Society of the Pacific Vol. 87; no. 519; pp. 721 - 734
Main Author SNOWDEN, MICHAEL S.
Format Journal Article
LanguageEnglish
Published The Astronomical Society of the Pacific 01.10.1975
Subjects
Absolute magnitude
Ap stars
Apparent magnitude
Astronomical magnitude
Astronomical photometry
Main sequence stars
Open star clusters
Spectroscopy
Stars
Variable stars
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Summary:Extensive uvby and Hβ photometry was obtained for stars in the region of the open cluster NGC 2516. A photometric analysis revealed variable reddening and a mean reddening of E(b— y) = 0ṃ088. In addition to determining a new age of 137 × 10₆ years and a new adopted distance modulus of 8ṃ01, several possible new variable stars were discovered, one of which may be an eclipsing Ap star. From the photometry of the Si-λ4200 stars in the cluster it appears the absolute magnitudes and masses for this type of star are not as restricted as previously thought.
ISSN:0004-6280
1538-3873
DOI:10.1086/129834