Stellar kinematics in blue compact galaxies
Abstract
In a programme of observations of local luminous blue compact galaxies (BCGs), we are investigating kinematics by using tracers of both stars and ionized gas. Here we summarise our program and present new data on the local Lyman break galaxy analogue Haro 11. From spatially-resolved spectroscopy around the near-infrared Ca II triplet, we find that its stars and ionized gas have similar velocity fields. Our programme so far indicates however that emission line velocities can differ locally by a few tens of km/s from the Ca II values. Comparing our data to simple stellar population models, we assess which stellar population the Ca II triplet traces and its potential beyond the local universe.
Keywords
Cite
@article{arxiv.0901.2869,
title = {Stellar kinematics in blue compact galaxies},
author = {Robert J. Cumming and Göran Östlin and Thomas Marquart and Kambiz Fathi and Nils Bergvall and Angela Adamo},
journal= {arXiv preprint arXiv:0901.2869},
year = {2009}
}
Comments
6 pages, 5 figures. To appear in the proceedings of the meeting "Star-forming Dwarf Galaxies: Ariadne's Thread in the Cosmic Labyrinth", Crete, 2008, eds P. Papaderos, N. Bergvall, T. Marquart and G. \"Ostlin