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Predictions for Herschel from Λ-cold dark matter: unveiling the cosmic star formation history

Lacey, C. G. and Baugh, C. M. and Frenk, C. S. and Benson, A. J. and Orsi, A. and Silva, L. and Granato, G. L. and Bressan, A. (2010) Predictions for Herschel from Λ-cold dark matter: unveiling the cosmic star formation history. Monthly Notices of the Royal Astronomical Society, 405 (1). pp. 2-28. ISSN 0035-8711.

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We use a model for the evolution of galaxies in the far-infrared (far-IR) based on the Λ-cold dark matter cosmology to make detailed predictions for the upcoming cosmological surveys with the Herschel Space Observatory. We use the combined GALFORM semi-analytical galaxy formation model and GRASIL spectrophotometric code to compute galaxy spectral energy distribution (SEDs) including the reprocessing of radiation by dust. The model, which is the same as that in Baugh et al., assumes two different initial mass functions (IMFs): a normal solar neighbourhood IMF for quiescent star formation in discs, and a very top-heavy IMF in starbursts triggered by galaxy mergers. We have shown previously that the top-heavy IMF appears necessary to explain the number counts and redshifts of faint submillimetre galaxies. In this paper, we present predictions for galaxy luminosity functions, number counts and redshift distributions in the Herschel imaging bands. We find that source confusion will be a serious problem in the deepest planned surveys. We also show predictions for physical properties such as star formation rates and stellar, gas and halo masses, together with fluxes at other wavelengths (from the far-ultraviolet to the radio) relevant for multi-wavelength follow-up observations. We investigate what fraction of the total IR emission from dust and of the high-mass star formation over the history of the Universe should be resolved by planned surveys with Herschel, and find a fraction ~30–50 per cent, depending on confusion. Finally, we show that galaxies in Herschel surveys should be significantly clustered.

Item Type:Article
Related URLs:
URLURL TypeDescription DOIArticle
Lacey, C. G.0000-0001-9016-5332
Baugh, C. M.0000-0002-9935-9755
Frenk, C. S.0000-0002-2338-716X
Benson, A. J.0000-0001-5501-6008
Orsi, A.0000-0002-8359-7812
Additional Information:© 2010 The Authors. Journal compilation © 2010 RAS. Accepted 2010 January 28. Received 2010 January 28; in original form 2009 September 7. We thank the referee Steve Eales for a helpful and positive report. This work was supported in part by the Science and Technology Facilities Council rolling grant to the ICC. CSF acknowledges a Royal Society Wolfson Research Grant Award, and CMB acknowledges a Royal Society University Research Fellowship. AO was supported by a Gemini Fellowship from the STFC. AJB acknowledges the support of the Gordon and Betty Moore Foundation.
Group:Moore Center for Theoretical Cosmology and Physics
Funding AgencyGrant Number
Science and Technology Facilities Council (STFC)UNSPECIFIED
Gordon and Betty Moore FoundationUNSPECIFIED
Subject Keywords:dust; extinction; ISM: evolution; galaxies: evolution; galaxies: formation; galaxies: high-redshift; infrared: galaxies
Issue or Number:1
Record Number:CaltechAUTHORS:20100629-091542525
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Official Citation:C. G. Lacey, C. M. Baugh, C. S. Frenk, A. J. Benson, A. Orsi, L. Silva, G. L. Granato, and A. Bressan Predictions for Herschel from Λ-cold dark matter: unveiling the cosmic star formation history MNRAS (2010) Vol. 405 2-28 doi:10.1111/j.1365-2966.2010.16463.x First published online June 11, 2010
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:18843
Deposited By: Tony Diaz
Deposited On:05 Aug 2010 22:05
Last Modified:11 Dec 2020 23:12

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