Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992mnras.256..515e&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 256, no. 3, June 1, 1992, p. 515-518.
Astronomy and Astrophysics
Astronomy
27
Brightness Distribution, Magellanic Clouds, Star Clusters, Stellar Evolution, Stellar Luminosity, Stellar Models, Charge Coupled Devices, Stellar Mass, Stellar Spectrophotometry
Scientific paper
Surface profiles are presented for five rich star clusters in the LMC (NGC 1783, 1856, 1987, 2107, and 2108), with ages between 10 exp 8 and 10 exp 9 yr. The profiles are well represented by King-like models, and the core radii follow the trend of increasing core radius with age that was found in previous work. If this trend reveals expansion due to mass loss through stellar evolution, then the new data reinforce the idea that the slope of the initial mass function, which determines the rate of expansion, is consistent with the Salpeter value (x = 1.35), and is not generally as steep as x = 2.5. A sample of clusters and surface brightness profiles for them are presented in tabular and graphic form.
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