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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
Herschel-atlas galaxy counts and high-redshift luminosity functions: The formation of massive early-type galaxies
Astrophysical Journal, Volume 742, No. 1, Article 24, Year 2011
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Description
Exploiting the Herschel Astrophysical Terahertz Large Area Survey Science Demonstration Phase survey data, we have determined the luminosity functions (LFs) at rest-frame wavelengths of 100 and 250 μm and at several redshifts z ≳ 1, for bright submillimeter galaxies with star formation rates (SFRs) ≳ 100 M ⊙ yr-1. We find that the evolution of the comoving LF is strong up to ≈ z 2.5, and slows down at higher redshifts. From the LFs and the information on halo masses inferred from clustering analysis, we derived an average relation between SFR and halo mass (and its scatter). We also infer that the timescale of the main episode of dust-enshrouded star formation in massive halos (M H ≳ 3 × 1012 M ⊙) amounts to ∼7 × 10 8yr. Given the SFRs, which are in the range of 102-10 3 M ⊙ yr-1, this timescale implies final stellar masses of the order of 1011-1012 M ⊙. The corresponding stellar mass function matches the observed mass function of passively evolving galaxies at z ≳ 1. The comparison of the statistics for submillimeter and UV-selected galaxies suggests that the dust-free, UV bright phase is ≳ 102 times shorter than the submillimeter bright phase, implying that the dust must form soon after the onset of star formation. Using a single reference spectral energy distribution (SED; the one of the z ≈ 2.3 galaxy SMM J2135-0102), our simple physical model is able to reproduce not only the LFs at different redshifts >1 but also the counts at wavelengths ranging from 250 μm to 1mm. Owing to the steepness of the counts and their relatively broad frequency range, this result suggests that the dispersion of submillimeter SEDs of z > 1 galaxies around the reference one is rather small. © 2011. The American Astronomical Society. All rights reserved.
Authors & Co-Authors
Lapi, Andrea
Italy, Rome
Università Degli Studi Di Roma Tor Vergata
Italy, Trieste
Scuola Internazionale Superiore Di Studi Avanzati
Gonzalez-Nuevo, J.
Italy, Trieste
Scuola Internazionale Superiore Di Studi Avanzati
Fan, Lulu
Italy, Trieste
Scuola Internazionale Superiore Di Studi Avanzati
China, Hefei
University of Science and Technology of China
Bressan, Alessandro
Italy, Trieste
Scuola Internazionale Superiore Di Studi Avanzati
Italy, Padua
Osservatorio Astronomico Di Padova
de Zotti, Gianfranco
Italy, Trieste
Scuola Internazionale Superiore Di Studi Avanzati
Italy, Padua
Osservatorio Astronomico Di Padova
Danese, Luigi
Italy, Trieste
Scuola Internazionale Superiore Di Studi Avanzati
Negrello, Mattia
United Kingdom, Milton Keynes
The Open University
Dunne, Loretta
United Kingdom, Nottingham
University of Nottingham
Eales, Stephen A.
United Kingdom, Cardiff
Cardiff University
Maddox, Steve J.
United Kingdom, Nottingham
University of Nottingham
Auld, Robbie R.
United Kingdom, Cardiff
Cardiff University
Baes, Maarten
Belgium, Ghent
Universiteit Gent
Bonfield, David G.
United Kingdom, Hatfield
University of Hertfordshire
Buttiglione, Sara
Italy, Padua
Osservatorio Astronomico Di Padova
Cava, Antonio
Spain, Madrid
Universidad Complutense de Madrid
Clements, David L.
United Kingdom, London
Imperial College London
Cooray, Asantha Roshan
United States, Irvine
University of California, Irvine
Dariush, Aliakbar A.
United Kingdom, Cardiff
Cardiff University
United Kingdom, London
Imperial College London
Dye, S.
United Kingdom, Cardiff
Cardiff University
Fritz, Jacopo
Belgium, Ghent
Universiteit Gent
Herranz, Diego
Spain, Santander
Csic-uc - Instituto de Física de Cantabria Ifca
Hopwood, Rosalind H.B.
United Kingdom, Milton Keynes
The Open University
United Kingdom, London
Imperial College London
Ibar, E.
United Kingdom, Edinburgh
Royal Observatory
Ivison, Robert J.
United Kingdom, Edinburgh
Royal Observatory
United Kingdom, Edinburgh
University of Edinburgh, Institute for Astronomy
Jarvis, Matthew J.
United Kingdom, Hatfield
University of Hertfordshire
South Africa, Bellville
University of the Western Cape
Kaviraj, Sugata
United Kingdom, Cardiff
Cardiff University
López-Caniego, Marcos
Spain, Santander
Csic-uc - Instituto de Física de Cantabria Ifca
Massardi, M.
Italy, Bologna
Inaf Istituto Di Astrofisica Spaziale e Fisica Cosmica, Bologna
Michałowski, Michał J.
United Kingdom, Edinburgh
University of Edinburgh, Institute for Astronomy
Pascale, Enzo
United Kingdom, Cardiff
Cardiff University
Pohlen, Michael
United Kingdom, Cardiff
Cardiff University
Rigby, Emma E.
United Kingdom, Nottingham
University of Nottingham
Rodighiero, Giulia
Italy, Padua
Università Degli Studi Di Padova
Serjeant, Stephen B.G.
United Kingdom, Milton Keynes
The Open University
Smith, Daniel James B.
United Kingdom, Hatfield
University of Hertfordshire
Temi, Pasquale
United States, Moffett Field
Nasa Ames Research Center
Wardlow, Julie L.
United States, Irvine
University of California, Irvine
van der Werf, Paul P.
Netherlands, Leiden
Sterrewacht Leiden
Statistics
Citations: 147
Authors: 38
Affiliations: 20
Identifiers
Doi:
10.1088/0004-637X/742/1/24
ISSN:
0004637X
e-ISSN:
15384357
Study Design
Cross Sectional Study
Study Approach
Quantitative