Main-sequence luminosity and initial mass functions of six Magellanic Cloud star clusters ranging in age from 10 megayears to 2.5 gigayears

Details Main-sequence luminosity and initial mass functions of six Magellanic Cloud star clusters ranging in age from 10 megayears to 2.5 gigayears Main-sequence luminosity and initial mass functions of six Magellanic Cloud star clusters ranging in age from 10 megayears to 2.5 gigayears

Aug 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...331..261m&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 331, Aug. 1, 1988, p. 261-293.

Astronomy and Astrophysics

Astrophysics

129

Globular Clusters, Magellanic Clouds, Main Sequence Stars, Stellar Evolution, Stellar Luminosity, Color-Magnitude Diagram, Metallicity, Stellar Mass

Scientific paper

Deep CCD B and V frames of six star clusters in the Magellanic Clouds (MCs) have been analyzed in order to determine the main-sequence mass functions for the stars in these systems. The clusters span a range in metallicity from about solar to 1/20th solar. The procedures used to determine the cluster luminosity functions (LFs) are described in detail. These LFs were converted to mass functions (MFs) via mass-absolute magnitude relations based on theoretical isochrones that were "fitted" to the cluster color-magnitude diagrams. Arguments are presented that the observed MFs of the program clusters are very similar to their initial mass function (IMFs). The shapes of IMFs of the six clusters are indistinguishable in the range 0.9 - 10.5 M_sun;, and there is no reason to reject the hypothesis that the IMFs of the six clusters were drawn from a single power-law IMF. The average IMF of the program clusters is remarkably similar to the solar neighborhood IMF determined by Scalo, and the MC cluster IMF slope is similar to some recent findings for high-mass stars in the LMC.

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