Other
Scientific paper
Sep 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aas...19411001y&link_type=abstract
American Astronomical Society Meeting 194, #110.01
Other
Scientific paper
Recent deep HST observations of a few selected globular clusters show that the number of faint main sequence stars diminishes rather quickly beyond a peak around M_v ~ 9 mag. Previous ground-based studies on M13, however, have indicated an opposite trend, i.e. rapidly increasing population at the faint end of luminosity function. Based on our ground based but deep BV CCD photometry, we examine the true shape of M13 luminosity function down to V ~ 25. In contrast to other studies, we do not see the sudden increase in the number of stars at these faint magnitudes. The main cause of this discrepancy appears to be the inappropriate application of standard galactic models when estimating the field star contamination. We also examine the radial dependency of luminosity function.
Byun Yong-Ik.
Chun Moon-Suk
Yim Hong-Seo
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