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Spitzer Observations of High Redshift Radio Galaxies

Seymour, N. and Stern, D. and de Breuck, C. and Vernet, J. and Fosbury, R. and Rettura, A. and Zirm, A. and Rocca-Volmerange, B. and Lacy, M. and Teplitz, H. and Dey, A. and Dickinson, M. and van Breugel, W. and Miley, G. and Röttgering, H. and Eisenhardt, P. and McCarthy, P. and De Breuck, F. and Vernet, L. (2008) Spitzer Observations of High Redshift Radio Galaxies. In: The Second Annual Spitzer Science Center Conference: Infrared Diagnostics of Galaxy Evolution. ASP Conference Series. Vol.381. Astronomical Society of the Pacific , San Francisco, CA, pp. 398-404. ISBN 978-1-58381-325-6.

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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 1.6μm. The stellar luminosities are found to be consistent with that of a giant elliptical with a stellar mass of 10^(11−12)M_⊙. The mean stellar mass remains constant at 10^(11.5)M_⊙ up to z = 3 indicating that the upper end of the mass function is already in place at redshift 3. The mid-IR luminosities imply bolometric IR luminosities that would classify most 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, i.e. z < 1, radio galaxies.

Item Type:Book Section
Related URLs:
URLURL TypeDescription
Seymour, N.0000-0003-3506-5536
Stern, D.0000-0003-2686-9241
de Breuck, C.0000-0002-6637-3315
Vernet, J.0000-0002-8639-8560
Rettura, A.0000-0002-5615-256X
Lacy, M.0000-0002-3032-1783
Teplitz, H.0000-0002-7064-5424
Dey, A.0000-0002-4928-4003
Dickinson, M.0000-0001-5414-5131
Additional Information:© 2008 Astronomical Society of the Pacific. We thank the LOC for organising a great conference and were particularly impressed by the nifty design of the webpage. We also liked Harry’s conference haircut.
Group:Infrared Processing and Analysis Center (IPAC)
Series Name:ASP Conference Series
Record Number:CaltechAUTHORS:20100728-095131612
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:19207
Deposited By: Jason Perez
Deposited On:02 Aug 2010 04:58
Last Modified:21 Apr 2020 00:02

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