Other
Scientific paper
Jan 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21560618s&link_type=abstract
American Astronomical Society, AAS Meeting #215, #606.18; Bulletin of the American Astronomical Society, Vol. 36, p.1132
Other
Scientific paper
Photometry for the metal-poor globular cluster M30 is presented in B, V, R and I bandwidths. A color-magnitude diagram created from this photometry indicates that accurate magnitude measurements were obtained for stars from the red giant branch through the lower main sequence. Time-series photometry is presented for six RR Lyrae type variable stars, three of which are newly discovered. Four variable stars of other types, three of them newly discovered, are also discussed. A metallicity value of [Fe/H]=-2.02 was adopted for this study. Using the RR Lyrae stars’ mean magnitudes, a reddening of E(B-V)=0.053±0.019 was found for this cluster as well as an extinction value of Av=0.165±0.019. A distance modulus of μ=14.504±0.210 and the corresponding distance of 7.958±0.243 kpc was also computed using the RR Lyrae stars’ mean magnitudes. Isochrone fitting of the color-magnitude diagram yielded a cluster age of 10.20±2 Gyr.
Layden Andrew Choisy
Smitka Michael T.
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