Mathematics
Scientific paper
Dec 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987aj.....94.1564e&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 94, Dec. 1987, p. 1564-1577.
Mathematics
12
Dwarf Galaxies, Elliptical Galaxies, Functions (Mathematics), Giant Stars, Spectrum Analysis, Stellar Luminosity, Abundance, Helium, Stellar Evolution, Stellar Mass, Stellar Models
Scientific paper
The global luminosity function for the Fornax dwarf elliptical galaxy has been determined from UK Schmidt plates in B and V. The functions do not extend below the horizontal-branch (HB) peak, and thus provide information on only the bright giants. Both functions show evidence of structure in the giant branch. Comparisons are made with luminosity functions (LFs) of globular clusters covering a range in metallicity similar to that found in the Fornax system. These comparisons indicate the old population of Fornax is similar to that of such moderately metal-poor clusters as M5 and M13. They also demonstrate vividly the existence of a significant excess population of very bright stars over that seen in pure old systems. Comparisons are also made with theoretical luminosity functions of various ages and helium abundances.
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