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Age indicators in starbursts before the Wolf-Rayet phase

Published online by Cambridge University Press:  25 May 2016

Y. Divakara Mayya
Y. Divakara Mayya*
Affiliation:
INAOE, Luis Enrique Erro 1, Tonantzintla, Puebla, México

Abstract

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Most of the commonly used tracers of age of starburst regions are based on the presence of massive O-type and Wolf Rayet stars, and hence are applicable only during the nebular and WR phases of starburst. The beginning of the WR phase coincides with the end of the RSG phase. The presence of RSGs in starburst regions can be directly inferred by the Calcium Triplet (CaT) and other characteristic absorption features. These features, accompanied by evolutionary population synthesis modeling, can be used for accurate age determinations of starburst regions. Spatially resolved CaT spectra of a sample of nearby starburst galaxies are being analyzed to determine the age of starbursts in them. Results for the starburst knots of M 82 are presented here.

Type
Part 5. Wolf-Rayet stars and other massive stars in starburst galaxies: the case of Wolf-Rayet galaxies (integrated spectra)
Information
Symposium - International Astronomical Union , Volume 193: Wolf-Rayet Phenomena in Massive Stars and Starburst Galaxies , 1999 , pp. 608 - 609
Copyright
Copyright © Astronomical Society of the Pacific 1999 

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