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Title: A Study of the Emission-Line Spectra and the Stellar Populations of Starburst Galaxies
Authors: Ravindranath, S
Prabhu, T. P
Keywords: Optical-NIR Spectra;Nebular Properties;Stellar Populations;Starburst Nuclei;HII Nuclei;Starburst Galaxies
Issue Date: Mar-2001
Publisher: Springer
Citation: Astrophysics and Space Science, Vol. 276, No. 2-4, pp. 593 - 599
Abstract: Based on optical-NIR spectra, we discuss the nebular properties and stellar populations of starburst nuclei. Starbursts are found to have higher electron densities and higher excitations than HII nuclei. The emission lines have been used to estimate the nebular oxygen abundances, ionization parameter and radiation softness parameter. From a study of the H_α emission-line equivalent widths and the CaII triplet absorption line equivalent widths, we infer the ages and stellar content of the starburst regions. Most of the nuclei show evidence for a composite population - a young, ionizing population co-existing with evolved, non-ionizing stars of about 5-7 Myr, which are evolving towards the peak of RSG distribution.
Description: Restricted Access
ISSN: 0004-640X
Appears in Collections:IIAP Publications

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