CCD Stromgren UVBY photometry of the young clusters NGC 1893, NGC 457, Berkeley 94 and Bochum 1

Details CCD Stromgren UVBY photometry of the young clusters NGC 1893, NGC 457, Berkeley 94 and Bochum 1 CCD Stromgren UVBY photometry of the young clusters NGC 1893, NGC 457, Berkeley 94 and Bochum 1

May 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26as...99...15f&link_type=abstract

Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 99, no. 1, p. 15-29.

Astronomy and Astrophysics

Astrophysics

15

Charge Coupled Devices, Early Stars, Open Clusters, Stellar Spectrophotometry, Ubv Spectra, Color-Magnitude Diagram, Interstellar Extinction

Scientific paper

Stromgren uvby colors are presented for 150 stars in fields containing the young galactic clusters NGC 1893, NGC 457, Berkeley 94, and Bochum 1. Cluster members are identified via inspection of color magnitude diagrams and reddening-free indices, and intrinsic colors are calculated. Members of Be 94 exhibit a substantial spread of reddenings, which because of the compactness of this cluster may be due to circumstellar material. A blue straggler is identified in NGC 457. Assuming a standard galactic reddening law, the distances to the clusters are 4.8 kpc for NGC 1893, 2.5 kpc for NGC 457, 3.5 kpc for Be 94, and 4.8 kpc for Bo 1.

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