A Study of the Emission-Line Spectra and the Stellar Populations of Starburst Galaxies |
| |
Authors: | S Ravindranath TP Prabhu |
| |
Institution: | (1) Indian Institute of Astrophysics, Koramangala, Bangalore, 560034, India |
| |
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 Hα 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.
This revised version was published online in July 2006 with corrections to the Cover Date. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|