%0 Journal Article
%T The Herschel census of infrared SEDs through cosmic time
%A Myrto Symeonidis
%A M. Vaccari
%A S. Berta
%A M. J. Page
%A D. Lutz
%A V. Arumugam
%A H. Aussel
%A J. Bock
%A A. Boselli
%A V. Buat
%A P. L. Capak
%A D. L. Clements
%A A. Conley
%A L. Conversi
%A A. Cooray
%A C. D. Dowell
%A D. Farrah
%A A. Franceschini
%A E. Giovannoli
%A J. Glenn
%A M. Griffin
%A E. Hatziminaoglou
%A H. -S. Hwang
%A E. Ibar
%A O. Ilbert
%A R. J. Ivison
%A E. Le Floc'h
%A S. Lilly
%A J. S. Kartaltepe
%A B. Magnelli
%A G. Magdis
%A L. Marchetti
%A H. T. Nguyen
%A R. Nordon
%A B. O'Halloran
%A S. J. Oliver
%A A. Omont
%A A. Papageorgiou
%A H. Patel
%A C. P. Pearson
%A I. Perez-Fournon
%A M. Pohlen
%A P. Popesso
%A F. Pozzi
%A D. Rigopoulou
%A L. Riguccini
%A D. Rosario
%A I. G. Roseboom
%A M. Rowan-Robinson
%A M. Salvato
%A B. Schulz
%A Douglas Scott
%A N. Seymour
%A D. L. Shupe
%A A. J. Smith
%A I. Valtchanov
%A L. Wang
%A C. K. Xu
%A M. Zemcov
%A S. Wuyts
%J Physics
%D 2013
%I arXiv
%R 10.1093/mnras/stt330
%X Using Herschel data from the deepest SPIRE and PACS surveys (HerMES and PEP) in COSMOS and GOODS (N+S), we examine the dust properties of IR-luminous (L_IR>10^10 L_sun) galaxies at 0.1<z<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 SEDs with broad far-IR peaks characterised by cool/extended dust emission and average dust temperatures in the 25-45K range. Hot (T>45K) SEDs and cold (T<25K), 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[L_IR/L_sun]=12.5 galaxies is about 10K higher than that of their log[L_IR/L_sun]=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 10K lower than what is measured locally. This is manifested as a flattening of the L-T relation, suggesting that (U)LIRGs in the early Universe are typically characterised 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<35K showing a 2-fold increase from z~0 to z~2, whereas that of ULIRGs with T<35K shows a 6-fold increase.
%U http://arxiv.org/abs/1302.4895v1