Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...222...89a&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 222, no. 1-2, Sept. 1989, p. 89-95. Research supported by CNRS and DFG.
Astronomy and Astrophysics
Astrophysics
20
Early Stars, Magellanic Clouds, Star Clusters, Stellar Color, Stellar Evolution, Ubv Spectra, Red Giant Stars, Stellar Mass Ejection, Stellar Models
Scientific paper
The occurrence of rapid red phases in the integrated colors of star clusters is studied by comparing a color evolution model with spectral and broad band UBVK observations in the LMC. The model is computed with a very small age step and a fine mass grid of stellar tracks which allow to study the importance of the red supergiant (RSG) phase to the integrated light. This study is based on classical evolutionary tracks for massive stars, but the effects of stellar mass loss and internal mixing processes are also noted. Taking into account the RSG phase, the model colors are found to be consistent with the observed ones for young clusters, if internal reddening in the range of 0.1 to 0.2 is considered.
Arimoto Nobou
Bica Eduardo
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