Evolution of Dust Temperature of Galaxies through Cosmic Time as seen by Herschel
Abstract
We study the dust properties of galaxies in the redshift range 0.1<z<2.8 observed by the Herschel Space Observatory in the field of the Great Observatories Origins Deep Survey-North as part of PEP and HerMES key programmes. Infrared (IR) luminosity (L_IR) and dust temperature (T_dust) of galaxies are derived from the spectral energy distribution (SED) fit of the far-infrared (FIR) flux densities obtained with PACS and SPIRE instruments onboard Herschel. As a reference sample, we also obtain IR luminosities and dust temperatures of local galaxies at z<0.1 using AKARI and IRAS data in the field of the Sloan Digital Sky Survey. We compare the L_IR-T_dust relation between the two samples and find that: the median T_dust of Herschel-selected galaxies at z>0.5 with L_IR>5x10^{10} L_\odot, appears to be 2-5 K colder than that of AKARI-selected local galaxies with similar luminosities; and the dispersion in T_dust for high-z galaxies increases with L_IR due to the existence of cold galaxies that are not seen among local galaxies. We show that this large dispersion of the L_IR-T_dust relation can bridge the gap between local star-forming galaxies and high-z submillimeter galaxies (SMGs). We also find that three SMGs with very low T_dust (<20 K) covered in this study have close neighbouring sources with similar 24-\mum brightness, which could lead to an overestimation of FIR/(sub)millimeter fluxes of the SMGs.
Keywords
Cite
@article{arxiv.1009.1058,
title = {Evolution of Dust Temperature of Galaxies through Cosmic Time as seen by Herschel},
author = {H. S. Hwang and D. Elbaz and G. E. Magdis and E. Daddi and M. Symeonidis and B. Altieri and A. Amblard and P. Andreani and V. Arumugam and R. Auld and H. Aussel and T. Babbedge and S. Berta and A. Blain and J. Bock and A. Bongiovanni and A. Boselli and V. Buat and D. Burgarella and N. Castro-Rodriguez and A. Cava and J. Cepa and P. Chanial and E. Chapin and R. -R. Chary and A. Cimatti and D. L. Clements and A. Conley and L. Conversi and A. Cooray and H. Dannerbauer and M. Dickinson and H. Dominguez and C. D. Dowell and J. S. Dunlop and E. Dwek and S. Eales and D. Farrah and N. Forster Schreiber and M. Fox and A. Franceschini and W. Gear and R. Genzel and J. Glenn and M. Griffin and C. Gruppioni and M. Halpern and E. Hatziminaoglou and E. Ibar and K. Isaak and R. J. Ivison and W. -S. Jeong and G. Lagache and D. Le Borgne and E. Le Floc'h and H. M. Lee and J. C. Lee and M. G. Lee and L. Levenson and N. Lu and D. Lutz and S. Madden and B. Maffei and B. Magnelli and G. Mainetti and R. Maiolino and L. Marchetti and A. M. J. Mortier and H. T. Nguyen and R. Nordon and B. O'Halloran and K. Okumura and S. J. Oliver and A. Omont and M. J. Page and P. Panuzzo and A. Papageorgiou and C. P. Pearson and I. Perez-Fournon and A. M. Perez Garcia and A. Poglitsch and M. Pohlen and P. Popesso and F. Pozzi and J. I. Rawlings and D. Rigopoulou and L. Riguccini and D. Rizzo and G. Rodighiero and I. G. Roseboom and M. Rowan-Robinson and A. Saintonge and M. Sanchez Portal and P. Santini and M. Sauvage and B. Schulz and Douglas Scott and N. Seymour and L. Shao and D. L. Shupe and A. J. Smith and J. A. Stevens and E. Sturm and L. Tacconi and M. Trichas and K. E. Tugwell and M. Vaccari and I. Valtchanov and J. D. Vieira and L. Vigroux and L. Wang and R. Ward and G. Wright and C. K. Xu and M. Zemcov},
journal= {arXiv preprint arXiv:1009.1058},
year = {2015}
}
Comments
9 pages, 6 figures, To appear in MNRAS