CaltechAUTHORS
  A Caltech Library Service

Measures of star formation rates from infrared (Herschel) and UV (GALEX) emissions of galaxies in the HerMES fields

Buat, V. and Blain, A. and Bock, J. and Cooray, A. and Dowell, C. D. and Levenson, L. and Lu, N. and Nguyen, H. T. and Schulz, B. and Shupe, D. L. and Xu, C. K. and Zemcov, M. (2010) Measures of star formation rates from infrared (Herschel) and UV (GALEX) emissions of galaxies in the HerMES fields. Monthly Notices of the Royal Astronomical Society, 409 (1). L1-L6. ISSN 0035-8711. http://resolver.caltech.edu/CaltechAUTHORS:20110506-141700003

[img] PDF - Published Version
See Usage Policy.

Use this Persistent URL to link to this item: http://resolver.caltech.edu/CaltechAUTHORS:20110506-141700003

Abstract

The reliability of infrared (IR) and ultraviolet (UV) emissions to measure star formation rates (SFRs) in galaxies is investigated for a large sample of galaxies observed with the Spectral and Photometric Imaging Receiver (SPIRE) and the Photodetector Array Camera and Spectrometer (PACS) instruments on Herschel as part of the Herschel Multi-Tiered Extragalactic Survey (HerMES) project. We build flux-limited 250-μm samples of sources at redshift z < 1, cross-matched with the Spitzer/MIPS and GALEX catalogues. About 60 per cent of the Herschel sources are detected in UV. The total IR luminosities, L_(IR), of the sources are estimated using a spectral energy distribution (SED) fitting code that fits to fluxes between 24 and 500 μm. Dust attenuation is discussed on the basis of commonly used diagnostics: the L_(IR)/L_(UV) ratio and the slope, β, 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)  > 10^(11) L_⊙ and 0.5 < z < 1 exhibit a mean dust attenuation A_(UV) of 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 β 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 of ~2–3. The SFRs deduced from L_(IR) are found to account for about 90 per cent of the total SFR; this percentage drops to 71 per cent for galaxies with SFR < 1 M_⊙ yr^(-1) (or L_(RI) < 10^(10) L_⊙). For these faint objects, one needs to combine UV and IR emissions to obtain an accurate measure of the SFR.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1111/j.1745-3933.2010.00916.xDOIUNSPECIFIED
Additional Information:© 2010 The Authors. Journal compilation © 2010 RAS. Accepted 2010 July 6. Received 2010 July 6; in original form 2010 May 20. Article first published online: 19 Aug 2010. SPIRE has been developed by a consortium of institutes led by Cardiff University (UK) and including University of Lethbridge (Canada); NAOC (China); CEA, OAMP (France); IFSI, University of Padua (Italy); IAC (Spain); Stockholm Observatory (Sweden); Imperial College London, RAL, UCL-MSSL, UKATC, University of Sussex (UK) and Caltech/JPL, IPAC, University of Colorado (USA). This development has been supported by national funding agencies CSA (Canada); NAOC (China); CEA, CNES, CNRS (France); ASI (Italy); MCINN (Spain); SNSB (Sweden); STFC (UK) and NASA (USA). The data presented in this Letter will be released through the Herschel Database in Marseille HeDaM (http://hedam.oamp.fr/HerMES). This Letter makes use of TOPCAT, http://www.star.bristol.ac.uk/mbt/topcat/.
Group:TAPIR
Funders:
Funding AgencyGrant Number
CSA (Canada) UNSPECIFIED
NAOC (China) UNSPECIFIED
CEA (France)UNSPECIFIED
CNES (France) UNSPECIFIED
CNRS (France)UNSPECIFIED
ASI (Italy) UNSPECIFIED
MCINN (Spain)UNSPECIFIED
SNSB (Sweden) UNSPECIFIED
STFC (United Kingdom)UNSPECIFIED
NASAUNSPECIFIED
Subject Keywords:galaxies: evolution; galaxies: stellar content; infrared: galaxies; ultraviolet: galaxies
Record Number:CaltechAUTHORS:20110506-141700003
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20110506-141700003
Official Citation:Measures of star formation rates from infrared (Herschel) and UV (GALEX) emissions of galaxies in the HerMES fields (pages L1–L6) V. Buat, E. Giovannoli, D. Burgarella, B. Altieri, A. Amblard, V. Arumugam, H. Aussel, T. Babbedge, A. Blain, J. Bock, A. Boselli, N. Castro-Rodríguez, A. Cava, P. Chanial, D. L. Clements, A. Conley, L. Conversi, A. Cooray, C. D. Dowell, E. Dwek, S. Eales, D. Elbaz, M. Fox, A. Franceschini, W. Gear, J. Glenn, M. Griffin, M. Halpern, E. Hatziminaoglou, S. Heinis, E. Ibar, K. Isaak, R. J. Ivison, G. Lagache, L. Levenson, C. J. Lonsdale, N. Lu, S. Madden, B. Maffei, G. Magdis, G. Mainetti, L. Marchetti, G. E. Morrison, H. T. Nguyen, B. O'Halloran, S. J. Oliver, A. Omont, F. N. Owen, M. J. Page, M. Pannella, P. Panuzzo, A. Papageorgiou, C. P. Pearson, I. Pérez-Fournon, M. Pohlen, D. Rigopoulou, D. Rizzo, I. G. Roseboom, M. Rowan-Robinson, M. Sánchez Portal, B. Schulz, N. Seymour, D. L. Shupe, A. J. Smith, J. A. Stevens, V. Strazzullo, M. Symeonidis, M. Trichas, K. E. Tugwell, M. Vaccari, E. Valiante, I. Valtchanov, L. Vigroux, L. Wang, R. Ward, G. Wright, C. K. Xu and M. Zemcov DOI: 10.1111/j.1745-3933.2010.00916.x
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:23585
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:10 May 2011 21:09
Last Modified:23 Dec 2013 23:03

Repository Staff Only: item control page