Spitzer Observations of High Redshift Radio Galaxies
Abstract
We present the results of a comprehensive Spitzer survey of 70 radio galaxies across 1<z<5.2. Using IRAC, IRS and MIPS imaging we determine the rest-frame AGN contribution to the stellar emission peak at 1.6um. The stellar luminosities are found to be consistent with that of a giant elliptical with a stellar mass of 10^11-12Msun. The mean stellar mass remains constant at \~10^11.5Msun up to z=3 indicating that the upper end of the mass function is already in place by this redshift. The mid-IR luminosities imply bolometric IR luminosities that would classify all sources as ULIRGs. The mid-IR to radio luminosity generally correlate implying a common origin for these emissions. The ratio is higher than that found for lower redshift, ie z<1, radio galaxies.
Keywords
Cite
@article{arxiv.astro-ph/0604226,
title = {Spitzer Observations of High Redshift Radio Galaxies},
author = {N. Seymour and D. Stern and C. De Breuck},
journal= {arXiv preprint arXiv:astro-ph/0604226},
year = {2019}
}
Comments
6 pages, 5 figures, to appear in the proceedings of "The Spitzer Science Center 2005 Conference: Infrared Diagnostics of Galaxy Evolution", held in Pasadena, November 2005