T.S.R. Babbedge
Luminosity functions for galaxies and quasars in the Spitzer Wide-area Infrared Extragalactic Legacy Survey
Babbedge, T.S.R.; Rowan-Robinson, M.; Vaccari, M.; Surace, J.A.; Lonsdale, C.J.; Clements, D.L.; Fang, F.; Farrah, D.; Franceschini, A.; Gonzalez-Solares, E.; Hatziminaoglou, E.; Lacey, C.G.; Oliver, S.; Onyett, N.; Pérez-Fournon, I.; Polletta, M.; Pozzi, F.; Rodighiero, G.; Shupe, D.L.; Siana, B.; Smith, H.E.
Authors
M. Rowan-Robinson
M. Vaccari
J.A. Surace
C.J. Lonsdale
D.L. Clements
F. Fang
D. Farrah
A. Franceschini
E. Gonzalez-Solares
E. Hatziminaoglou
Professor Cedric Lacey cedric.lacey@durham.ac.uk
Professor
S. Oliver
N. Onyett
I. Pérez-Fournon
M. Polletta
F. Pozzi
G. Rodighiero
D.L. Shupe
B. Siana
H.E. Smith
Abstract
We construct rest-frame luminosity functions (LFs) at 3.6, 4.5, 5.8, 8 and 24 μm over the redshift range 0 < z < 2 for galaxies and 0 < z < 4 for optical quasi-stellar objects (QSOs), using optical and infrared (IR) data from the Spitzer Wide-area Infrared Extragalactic (SWIRE) Survey. The 3.6- and 4.5-μm galaxy LFs show evidence for moderate positive luminosity evolution up to z∼ 1.5, consistent with the passive ageing of evolved stellar populations. Their comoving luminosity density was found to evolve passively, gradually increasing out to z∼ 0.5–1 but flattening, or even declining, at higher redshift. Conversely, the 24-μm galaxy LF, which is more sensitive to obscured star formation and/or active galactic nuclei (AGN) activity, undergoes strong positive evolution, with the derived IR energy density and star formation rate (SFR) density ∝ (1 +z)γ with γ= 4.5+0.7−0.6 and the majority of this evolution occurring since z∼ 1. Optical QSOs, however, show positive luminosity evolution in all bands, out to the highest redshifts (3 < z < 4). Modelling as L*∝ (1 +z)γ gave γ= 1.3+0.1−0.1 at 3.6 μm, γ= 1.0+0.1−0.1 at 4.5 μm and stronger evolution at the longer wavelengths (5.8, 8 and 24 μm), of γ∼ 3. Comparison of the galaxy LFs to predictions from a semi-analytic model based on cold dark matter (CDM) indicates that an initial mass function (IMF) skewed towards higher mass star formation in bursts compared to locally be preferred. As a result, the currently inferred massive SFRs in distant submm sources may require substantial downwards revision.
Journal Article Type | Article |
---|---|
Publication Date | Aug 11, 2006 |
Deposit Date | Jun 27, 2014 |
Publicly Available Date | Jan 29, 2015 |
Journal | Monthly Notices of the Royal Astronomical Society |
Print ISSN | 0035-8711 |
Electronic ISSN | 1365-2966 |
Publisher | Royal Astronomical Society |
Peer Reviewed | Peer Reviewed |
Volume | 370 |
Issue | 3 |
Pages | 1159-1180 |
DOI | https://doi.org/10.1111/j.1365-2966.2006.10547.x |
Keywords | Galaxies: evolution, Galaxies: photometry, Quasars: general, Cosmology: observations. |
Public URL | https://durham-repository.worktribe.com/output/1449058 |
Files
Published Journal Article
(775 Kb)
PDF
Copyright Statement
This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society © 2006 The Authors. Published by Oxford University Press on behalf of The Royal Astronomical Society. All rights reserved.
You might also like
FLAMINGO: calibrating large cosmological hydrodynamical simulations with machine learning.
(2023)
Journal Article
The Nature of (Sub)millimeter Galaxies in Hierarchical Models
(2007)
Conference Proceeding
The metal enrichment of galaxies and galaxy clusters in the cold dark matter universe
(2006)
Conference Proceeding
A Multi-Wavelength Model of Galaxy Formation
(2006)
Conference Proceeding
Galaxy Formation at High Redshifts: the View from the NGST.
(2001)
Conference Proceeding
Downloadable Citations
About Durham Research Online (DRO)
Administrator e-mail: dro.admin@durham.ac.uk
This application uses the following open-source libraries:
SheetJS Community Edition
Apache License Version 2.0 (http://www.apache.org/licenses/)
PDF.js
Apache License Version 2.0 (http://www.apache.org/licenses/)
Font Awesome
SIL OFL 1.1 (http://scripts.sil.org/OFL)
MIT License (http://opensource.org/licenses/mit-license.html)
CC BY 3.0 ( http://creativecommons.org/licenses/by/3.0/)
Powered by Worktribe © 2024
Advanced Search