The globular cluster Palomar 13

Details The globular cluster Palomar 13 The globular cluster Palomar 13

Mar 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985aj.....90..473o&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 90, March 1985, p. 473-478.

Astronomy and Astrophysics

Astronomy

30

Globular Clusters, Main Sequence Stars, Stellar Luminosity, Stellar Magnitude, Ubv Spectra, Variable Stars, Data Reduction, Giant Stars, Mass To Light Ratios, Stellar Color, Stellar Spectrophotometry

Scientific paper

The B and V magnitudes of 122 stars in the globular cluster Palomar (Pal) 13 have been determined through examination of plates from the 200-inch Hale telescope. The new data extend the preliminary estimates of Ciatti et al. (1965) of the color-magnitude diagram and luminosity function of Pal 13 to the upper main-sequence. The main sequence turnoff for B-V was at 0.38 + or - 0.03 mag, and at 21.1 + or - 0.2 mag for V. The luminosity function for Pal 13 was found to be similar to that of M3 over a central radius of 8 arcmin, when it was reduced by a factor of about 60. Integration of the luminosity function yielded an apparent magnitude of V = 13.75. The integrated absolute magnitude of the cluster was Mv = 3.4. Assuming a mass/luminosity ratio of 1.6, a mass of about 3 x 10 to the 3rd solar mass is estimated.

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