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The Herschel census of infrared SEDs through cosmic time

Symeonidis, M ; Vaccari, M ; Berta, S ; Page, M. J ; Lutz, D ; Arumugam, V ; Aussel, H ; Bock, J ; Boselli, A ; Buat, V ; Capak, P. L ; Clements, D. L ; Conley, A ; Conversi, L ; Cooray, A ; Dowell, C. D ; Farrah, D ; Franceschini, A ; Giovannoli, E ; Glenn, J ; Griffin, M ; Hatziminaoglou, E ; Hwang, H.-S ; Ibar, E ; Ilbert, O ; Ivison, R. J ; Floc'h, E. Le ; Lilly, S ; Kartaltepe, J. S ; Magnelli, B ; Magdis, G ; Marchetti, L ; Nguyen, H. T ; Nordon, R ; O'Halloran, B ; Oliver, S. J ; Omont, A ; Papageorgiou, A ; Patel, H ; Pearson, C. P ; Pérez-Fournon, I ; Pohlen, M ; Popesso, P ; Pozzi, F ; Rigopoulou, D ; Riguccini, L ; Rosario, D ; Roseboom, I. G ; Rowan-Robinson, M ; Salvato, M ; Schulz, B ; Scott, Douglas ; Seymour, N ; Shupe, D. L ; Smith, A. J ; Valtchanov, I ; Wang, L ; Xu, C. K ; Zemcov, M ; Wuyts, S

Monthly notices of the Royal Astronomical Society, 2013-05, Vol.431 (3), p.2317-2340 [Periódico revisado por pares]

London: Oxford University Press

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Título:
The Herschel census of infrared SEDs through cosmic time
Autor: Symeonidis, M ; Vaccari, M ; Berta, S ; Page, M. J ; Lutz, D ; Arumugam, V ; Aussel, H ; Bock, J ; Boselli, A ; Buat, V ; Capak, P. L ; Clements, D. L ; Conley, A ; Conversi, L ; Cooray, A ; Dowell, C. D ; Farrah, D ; Franceschini, A ; Giovannoli, E ; Glenn, J ; Griffin, M ; Hatziminaoglou, E ; Hwang, H.-S ; Ibar, E ; Ilbert, O ; Ivison, R. J ; Floc'h, E. Le ; Lilly, S ; Kartaltepe, J. S ; Magnelli, B ; Magdis, G ; Marchetti, L ; Nguyen, H. T ; Nordon, R ; O'Halloran, B ; Oliver, S. J ; Omont, A ; Papageorgiou, A ; Patel, H ; Pearson, C. P ; Pérez-Fournon, I ; Pohlen, M ; Popesso, P ; Pozzi, F ; Rigopoulou, D ; Riguccini, L ; Rosario, D ; Roseboom, I. G ; Rowan-Robinson, M ; Salvato, M ; Schulz, B ; Scott, Douglas ; Seymour, N ; Shupe, D. L ; Smith, A. J ; Valtchanov, I ; Wang, L ; Xu, C. K ; Zemcov, M ; Wuyts, S
Assuntos: Astrophysics ; Cosmology ; Dust ; Luminosity ; Sciences of the Universe ; Spectrum analysis ; Star & galaxy formation ; Temperature effects
É parte de: Monthly notices of the Royal Astronomical Society, 2013-05, Vol.431 (3), p.2317-2340
Descrição: 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 (L IR > 1010 L) 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 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 > 45 K) SEDs and cold (T < 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 [L IR/L] ∼ 12.5 galaxies is about 10 K higher than that of their log [L IR/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 < 35 K showing a two-fold increase from z ∼ 0 to z ∼ 2, whereas that of ULIRGs with T < 35 K shows a six-fold increase. Our results suggest a greater diversity in the IR-luminous population at high redshift, particularly for ULIRGs.
Editor: London: Oxford University Press
Idioma: Inglês

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The Herschel census of infrared SEDs through cosmic time

London: Oxford University Press

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