Mathematics
Scientific paper
Aug 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...307l..49m&link_type=abstract
Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 307, Aug. 15, 1986, p. L49-L53. NSERC-supported res
Mathematics
135
Globular Clusters, Main Sequence Stars, Stellar Luminosity, Stellar Mass Ejection, Stellar Models, Stellar Spectrophotometry, Charge Coupled Devices, Functions (Mathematics), Mass To Light Ratios, Metallicity
Scientific paper
Main-sequence luminosity functions constructed from CCD observations of globular clusters reveal a strong trend in slope with metal abundance. Theoretical luminosity functions constructed from VandenBerg and Bell's (1985) isochrones have been fitted to the observations and reveal a trend between x, the power-law index of the mass function, and metal abundance. The most metal-poor clusters require an index of about x = 2.5, whereas the most metal-rich clusters exhibit an index of x of roughly -0.5. The luminosity functions for two sparse clusters, E3 and Pal 5, are distinct from those of the more massive clusters, in that they show a turndown which is possibly a result of mass loss or tidal disruption.
Bell Roger A.
Fahlman Gregory G.
Harris William E.
Hesser James Edward
McClure Robert D.
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