UVBY and H-beta photometry of the open cluster IC 4996

Details UVBY and H-beta photometry of the open cluster IC 4996 UVBY and H-beta photometry of the open cluster IC 4996

Mar 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985a%26as...59..441a&link_type=abstract

Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 59, March 1985, p. 441-447.

Astronomy and Astrophysics

Astrophysics

11

Electrophotometry, H Beta Line, Open Clusters, Stellar Color, Stellar Spectrophotometry, Astrometry, B Stars, Distance, Stellar Magnitude

Scientific paper

Photoelectric uvby and H-beta observations have been obtained for 15 stars in the field of the open cluster IC 4996. An average color excess of E(b-y) = 0.473 is estimated for six observed members of the cluster, in good agreement with previous results. A comparison between the beta-M(v) calibrations given by Crawford (1978) and by Eggen (1974) suggests that the first one takes better into account the evolutionary effects on the H-beta index. A true distance modulus of 11.43 and an age of 7.5 million years have been calculated.

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