your ID: 0148 
First Name: Joel 
Last Name: Vernet 
Affiliation: European southern Observatory 
Title: The Massive Host of Radio Galaxies Across Cosmic Time 
Authors: J. Vernet, N. Seymour, C. De Breuck, D. Stern, R. Fosbury 
Topic: 9 
Session: oral 
Abstract: We present results of a comprehensive Spitzer survey of 70 radio galaxies
 across 1<z<5.2. Using IRAC (3.6-8mu), IRS (16mu) and MIPS (24-160mu) imaging, 
we decompose the restframe optical thru infrared SED into stellar, AGN and dust 
component. The resultant stellar luminosities imply host stellar masses of 10^(11-12) Msun, 
similar to most massive local giant elliptical galaxies. The mean stallar mass remains 
constant up to z~4, indicating that the upper end of the mass function is already in 
place alrearly cosmic epochs.