The globular cluster NGC 4833.
Abstract
A B V photometric investigation on the previously unstudied globular cluster NGC 4833 was carried out at the Cerro Tololo Inter-American Observatory with the 1.5 meter refiector. Forty-seven stars were observed photoelectrically to apparent magnitude V = 15.79. With this sequence 261 stars were calibrated photographically. The apparent distance modulus is (m-M) app = 14.70. The reddening is E (B-V) = 0.40. The true distance modulus is (m-M)0 = 13.50. The distance is 5012 pc from the Sun and 697 pc from the galactic plane. The giant branch rises 2.95 magnitude above the horizontal branch at (B-V)0 = 1.4, characteristic of a metal poor object. Key words: globular cluster - BV photometry - horizontal branch - RR Lyrae gap
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- July 1971
- Bibcode:
- 1971A&A....13..287A