GPS radio sources: new optical observations and an updated master list
Abstract
* Aims. Identify optical counterparts, address uncertain identifications and measure previously unknown redshifts of the host galaxies of candidate GPS radio sources, and study their stellar populations. * Methods. Long slit spectroscopy and deep optical imaging in the B, V and R bands, obtained with the Very Large Telescope. * Results. We obtain new redshifts for B0316+161, B0407-658, B0904+039, B1433-040, and identify the optical counterparts of B0008-421 and B0742+103. We confirm the previous identification for B0316+161, B0407-658, B0554-026, and B0904+039, and find that the previous identification for B0914+114 is incorrect. Using updated published radio spectral information we classify as non GPS the following sources: B0407-658, B0437-454, B1648+015. The optical colors of typical GPS sources are consistent with single instantaneous burst stellar population models but do not yield useful information on age or metallicity. A new master list of GPS sources is presented.
Cite
@article{arxiv.astro-ph/0611600,
title = {GPS radio sources: new optical observations and an updated master list},
author = {A. Labiano and P. D. Barthel and C. P. O'Dea and W. H. de Vries and I. Pérez and S. A. Baum},
journal= {arXiv preprint arXiv:astro-ph/0611600},
year = {2009}
}
Comments
10 pages + GPS master list. Accepeted for publication by A&A