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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
The Herschel census of infrared SEDs through cosmic time
Monthly Notices of the Royal Astronomical Society, Volume 431, No. 3, Year 2013
Notification
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Description
Using Herschel data from the deepest SPIRE and PACS surveys (HerMES and PEP) in COSMOS, GOODS-S and GOODS-N, we examine the dust properties of infrared (IR)- luminous (LIR gt; 1010 L⊙) galaxies at 0.1 lt; z lt; 2 and determine how these evolve with cosmic time. The unique angle of this work is the rigorous analysis of survey selection effects, making this the first study of the star-formation-dominated, IR-luminous population within a framework almost entirely free of selection biases. We find that IR-luminous galaxies have spectral energy distributions (SEDs) with broad far-IR peaks characterized by cool/extended dust emission and average dust temperatures in the 25-45 K range. Hot (T gt; 45 K) SEDs and cold (T lt; 25 K), cirrus-dominated SEDs are rare, with most sources being within the range occupied by warm starbursts such as M82 and cool spirals such as M51. We observe a luminosity-temperature (L-T ) relation, where the average dust temperature of log [LIR/L⊙] ~ 12.5 galaxies is about 10 K higher than that of their log [LIR/L⊙] ~ 10.5 counterparts. However, although the increased dust heating in more luminous systems is the driving factor behind the L-T relation, the increase in dust mass and/or starburst size with luminosity plays a dominant role in shaping it. Our results show that the dust conditions in IR-luminous sources evolve with cosmic time: at high redshift, dust temperatures are on average up to 10 K lower than what is measured locally (z ≲ 0.1). This is manifested as a flattening of the L-T relation, suggesting that (ultra)luminous infrared galaxies [(U)LIRGs] in the early Universe are typically characterized by a more extended dust distribution and/or higher dust masses than local equivalent sources. Interestingly, the evolution in dust temperature is luminosity dependent, with the fraction of LIRGs with T lt; 35 K showing a two-fold increase from z ~ 0 to z ~ 2, whereas that of ULIRGs with T lt; 35 K shows a six-fold increase. Our results suggest a greater diversity in the IR-luminous population at high redshift, particularly for ULIRGs. © 2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society.
Authors & Co-Authors
Symeonidis, Myrto
Unknown Affiliation
Vaccari, Mattia
Unknown Affiliation
Berta, Stefano
Unknown Affiliation
Page, Mathew J.
Unknown Affiliation
Lutz, Dieter
Unknown Affiliation
Arumugam, Vinodiran
Unknown Affiliation
Aussel, Hervé
Unknown Affiliation
Bock, James J.
Unknown Affiliation
Boselli, Alessandro
Unknown Affiliation
Buat, Véronique
Unknown Affiliation
Capak, Peter L.
Unknown Affiliation
Clements, David L.
Unknown Affiliation
Conley, Alexander J.
Unknown Affiliation
Conversi, Luca
Unknown Affiliation
Cooray, Asantha Roshan
Unknown Affiliation
Dowell, Charles Darren
Unknown Affiliation
Farrah, Duncan G.
Unknown Affiliation
Franceschini, Alberto
Unknown Affiliation
Giovannoli, Elodie
Unknown Affiliation
Glenn, Jason
Unknown Affiliation
Griffin, Matthew J.
Unknown Affiliation
Hatziminaoglou, Evanthia
Unknown Affiliation
Hwang, Ho-seong
Unknown Affiliation
Ibar, E.
Unknown Affiliation
Ilbert, Olivier
Unknown Affiliation
Ivison, Robert J.
Unknown Affiliation
Le Floc'H, Émeric
Unknown Affiliation
Lilly, Simon J.
Unknown Affiliation
Kartaltepe, Jeyhan S.
Unknown Affiliation
Magnelli, Benjamin
Unknown Affiliation
Magdis, Georgios E.
Unknown Affiliation
Marchetti, Lucia
Unknown Affiliation
Nguyên, Hien Trong
Unknown Affiliation
Nordon, Raanan
Unknown Affiliation
O'Halloran, Brian
Unknown Affiliation
Oliver, Seb J.
Unknown Affiliation
Omont, Alain A.
Unknown Affiliation
Papageorgiou, Andreas
Unknown Affiliation
Patel, H.
Unknown Affiliation
Pearson, Christopher P.
Unknown Affiliation
Pérez-Fournon, Ismael
Unknown Affiliation
Pohlen, Michael
Unknown Affiliation
Popesso, Paola
Unknown Affiliation
Pozzi, Francesca
Unknown Affiliation
Rigopoulou, Dimitra
Unknown Affiliation
Riguccini, Laurie A.
Unknown Affiliation
Rosario, David J.V.
Unknown Affiliation
Roseboom, Isaac G.
Unknown Affiliation
Rowan-Robinson, Michael
Unknown Affiliation
Salvato, Mara
Unknown Affiliation
Schulz, Bernhard
Unknown Affiliation
Douglas Scott,
Unknown Affiliation
Seymour, Nick
Unknown Affiliation
Shupe, David L.
Unknown Affiliation
Smith, Anthony J.
Unknown Affiliation
Valtchanov, Ivan
Unknown Affiliation
Wang, Lingyu
Unknown Affiliation
Xu, Cong Kevin
Unknown Affiliation
Zemcov, Michael B.
Unknown Affiliation
Wuyts, Stijn
Unknown Affiliation
Statistics
Citations: 131
Authors: 60
Affiliations: 34
Identifiers
Doi:
10.1093/mnras/stt330
ISSN:
00358711
e-ISSN:
13652966
Research Areas
Environmental
Study Design
Cross Sectional Study
Study Approach
Quantitative