Measures of star formation rates from Infrared (Herschel) and UV (GALEX) emissions of galaxies in the HerMES fields
Creators: name: Buat, V.
name: Giovannoli, E.
name: Burgarella, D.
name: Altieri, B.
name: Amblard, A.
name: Arumugam, V.
name: Aussel, H.
name: Babbedge, T.
name: Blain, A.
name: Bock, J.
name: Boselli, A.
name: Castro-Rodriguez, N.
name: Cava, A.
name: Chanial, P.
name: Clements, D. L.
name: Conley, A.
name: Conversi, L.
name: Cooray, A.
name: Dowell, C. D.
name: Dwek, E.
name: Eales, S.
name: Elbaz, D.
name: Fox, M.
name: Franceschini, A.
name: Gear, W.
name: Glenn, J.
name: Griffin, M.
name: Halpern, M.
name: Hatziminaoglou, E.
name: Heinis, S.
name: Ibar, E.
name: Isaak, K.
name: Ivison, R. J.
name: Lagache, G.
name: Levenson, L.
name: Lonsdale, C. J.
name: Lu, N.
name: Madden, S.
name: Maffei, B.
name: Magdis, G.
name: Mainetti, G.
name: Marchetti, L.
name: Morrison, G. E.
name: Nguyen, H. T.
name: O'Halloran, B.
name: Oliver, S. J.
name: Omont, A.
name: Owen, F. N.
name: Page, M. J.
name: Pannella, M.
name: Panuzzo, P.
name: Papageorgiou, A.
name: Pearson, C. P.
name: Perez-Fournon, I.
name: Pohlen, M.
name: Rigopoulou, D.
name: Rizzo, D.
name: Roseboom, I. G.
name: Rowan-Robinson, M.
name: Portal, M. Sanchez
name: Schulz, B.
name: Seymour, N.
name: Shupe, D. L.
name: Smith, A. J.
name: Stevens, J. A.
name: Strazzullo, V.
name: Symeonidis, M.
name: Trichas, M.
name: Tugwell, K. E.
name: Vaccari, M.
name: Valiante, E.
name: Valtchanov, I.
name: Vigroux, L.
name: Wang, L.
name: Ward, R.
name: Wright, G.
name: Xu, C. K.
name: Zemcov, M.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: The reliability of infrared (IR) and ultraviolet (UV) emissions to measure star formation rates in galaxies is investigated for a large sample of galaxies observed with the SPIRE and PACS instruments on Herschel as part of the HerMES project. We build flux-limited 250 micron samples of sources at redshift z&lt;1, cross-matched with the Spitzer/MIPS and GALEX catalogues. About 60 % of the Herschel sources are detected in UV. The total IR luminosities, L_IR, of the sources are estimated using a SED-fitting code that fits to fluxes between 24 and 500 micron. Dust attenuation is discussed on the basis of commonly-used diagnostics: the L_IR/L_UV ratio and the slope, beta, of the UV continuum. A mean dust attenuation A_UV of ~ 3 mag is measured in the samples. L_IR/L_UV is found to correlate with L_IR. Galaxies with L_IR &gt; 10 ^{11} L_sun and 0.5&lt; z&lt;1 exhibit a mean dust attenuation A_UV about 0.7 mag lower than that found for their local counterparts, although with a large dispersion. Our galaxy samples span a large range of beta and L_IR/L_UV values which, for the most part, are distributed between the ranges defined by the relations found locally for starburst and normal star-forming galaxies. As a consequence the recipe commonly applied to local starbursts is found to overestimate the dust attenuation correction in our galaxy sample by a factor ~2-3 .
description: accepted for publication in MNRAS, Herschel special issue