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The z ~ 3 QSO Luminosity Function with SWIRE

Siana, B. and Polletta, M. and Smith, H. E. and Lonsdale, C. J. and Gonzalez-Solares, E. and Farrah, D. and Babbedge, T. S. R. and Rowan-Robinson, M. and Surace, J. and Shupe, D. and Fang, F. (2008) The z ~ 3 QSO Luminosity Function with SWIRE. 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. 454-457. ISBN 978-1-58381-325-6.

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We use a simple optical/infrared photometric selection of high redshift QSOs which identifies a Lyman Break in the optical and requires a red IRAC color to distinguish QSOs from common interlopers. We find 100 U-dropout (z ~ 3) QSO candidates with r′ < 22 within 11.2 deg^2 in the ELAIS-N1 & ELAIS-N2 fields in the Spitzer Wide-area Infrared Extragalactic (SWIRE) Legacy Survey. Spectroscopy of 10 candidates shows that they are all QSOs with 2.83 < z < 3.44. We use detailed simulations which incorporate variations in QSO SEDs, IGM transmission and imaging depth to derive a completeness of 85- 90% between 3.0 < z < 3.4. The resulting luminosity function is two magnitudes fainter than SDSS and, when combined with those data, gives a faint end slope β = 1.62±0.18, consistent with measurements at z < 2 and steeper than initial measurements at the same redshift.

Item Type:Book Section
Related URLs:
URLURL TypeDescription
Siana, B.0000-0002-4935-9511
Polletta, M.0000-0001-7411-5386
Lonsdale, C. J.0000-0003-0898-406X
Farrah, D.0000-0003-1748-2010
Surace, J.0000-0001-7291-0087
Shupe, D.0000-0003-4401-0430
Additional Information:© 2008 Astronomical Society of the Pacific.
Group:Infrared Processing and Analysis Center (IPAC)
Series Name:ASP Conference Series
Record Number:CaltechAUTHORS:20100726-103821078
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:19179
Deposited By: Jason Perez
Deposited On:02 Aug 2010 03:31
Last Modified:30 Sep 2020 18:22

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