Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apjs...76..185e&link_type=abstract
Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 76, May 1991, p. 185-214. Radcliffe College-supported research.
Astronomy and Astrophysics
Astrophysics
79
Galactic Evolution, Magellanic Clouds, Star Clusters, Astronomical Photometry, Color-Magnitude Diagram, Cosmology, Star Distribution, Star Formation, Stellar Mass
Scientific paper
The present evaluation of surface brightness profiles and color-magnitude diagrams for 18 rich star clusters in the LMC, whose ages range from 10 million to 1 billion years, notes that while the profiles of the older clusters are representable by models with King-like cores, those of many younger clusters resist such modeling in virtue of bumps, sharp 'shoulders', and central dips. If the clusters have undergone violent relaxation, then the small cores of the youngest ones may be indicative of formation from relatively 'cool' initial conditions. The sharp shoulders would then point point toward 'warmer' initial conditions, although they are alternatively explainable as signatures of merging subcondensations.
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