CCD Photometry of M92

Details CCD Photometry of M92 CCD Photometry of M92

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008rmxac..34..137r&link_type=abstract

IV Reunión sobre Astronomía Dinámica en Latino América (Eds. C. Allen, A. Ruelas, & R. Teixeira) Revista Mexicana de Astronomía

Astronomy and Astrophysics

Astronomy

Galaxy: Halo, Globular Clusters: General, Globular Clusters: Individual (M92), Stars: Evolution, Techniques: Photometric

Scientific paper

We present Johnson B and V photometry for the galactic globular cluster M92. Photometric results for a total of ~30000 stars are obtained and are plotted on a V vs (B - V) diagram. We fit theoretical isochrones to this diagram in order to get an estimate for the age of M92. The age which we find is ~16×10^9 years with the following values for the metallicity and He-abundance: [Fe/H]=-2.03, Y = 0.235. The distance modulus to this cluster turns out to be m - M = 14.6, in accordance with that obtained by Stetson & Harris (1988).

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