FMOS near-IR spectroscopy ofHerschel-selected galaxies: star formation rates, metallicity and dust attenuation atz∼ 1
Year: 2012
Type: article
Abstract: We investigate the properties (e.g. star formation rate, dust attenuation, stellar mass and metallicity) of a sample of infrared (IR) luminous galaxies at z ∼ 1 via near-IR spectroscopy with Subaru-FMOS. Our sample consists of Herschel SPIRE and Spitzer MIPS selected sources in the COSMOS field with photometric redshifts in the range of 0.7 < zphot < 1.8, which have been targeted in two pointings (0.5 deg2) with FMOS. We find a modest success rate for emission-line detections, with candidate Hα emission lines detected for 57 of 168 SPIRE sources (34 per cent). By stacking the near-IR spectra we directly measure the mean Balmer decrement for the Hα and Hβ lines, finding a value of 〈E(B − V)〉 = 0.51 ± 0.27 for 〈LIR〉 = 1012 L⊙ sources at 〈z〉 = 1.36. By comparing star formation rates estimated from the IR and from the dust-uncorrected Hα line we find a strong relationship between dust attenuation and star formation rate. This relation is broadly consistent with that previously seen in star-forming galaxies at z ∼ 0.1. Finally, we investigate the metallicity via the N2 ratio, finding that z ∼ 1 IR-selected sources are indistinguishable from the local mass–metallicity relation. We also find a strong correlation between dust attenuation and metallicity, with the most metal-rich IR sources experiencing the largest levels of dust attenuation.
Authors: I. G. Roseboom, A. Bunker, M. Sumiyoshi, L. Wang, G. Dalton, M. Akiyama, J. Bock, D. Bonfield, V. Buat, C. Casey, E. Chapin, D. L. Clements, A. Conley, E. Curtis-Lake, A. Cooray, J. S. Dunlop, D. Farrah, S. J. Ham, E. Ibar, F. Iwamuro, M. Kimura, I. Lewis, E. Macaulay, G. Magdis, T. Maihara, G. Marsden, T. Mauch, Y. Moritani, K. Ohta, S. J. Oliver, M. J. Page, B. Schulz, Douglas Scott, M. Symeonidis, N. Takato, N. Tamura, T. Totani, K. Yabe, M. Zemcov
Institutions: University of Sussex, Royal Observatory, University of Edinburgh, University of Oxford, Kyoto University, Rutherford Appleton Laboratory, Tohoku University, California Institute of Technology, Jet Propulsion Laboratory, University of Hertfordshire, Centre National de la Recherche Scientifique, Aix-Marseille Université, Laboratoire d’Astrophysique de Marseille, University of Hawaiʻi at Mānoa, Canada–France–Hawaii Telescope, University of British Columbia, Imperial College London, University of Colorado Boulder, University of California, Irvine, UK Astronomy Technology Centre, National Astronomical Observatory of Japan, University College London, Infrared Processing and Analysis Center
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
Funders: National Science Foundation, U.S. Department of Energy, National Aeronautics and Space Administration, Alfred P. Sloan Foundation, Princeton University, Ohio State University, California Institute of Technology, University of Washington, Johns Hopkins University, University of Pittsburgh, Case Western Reserve University, Drexel University, Universität Basel, University of Lethbridge, University of Portsmouth, New Mexico State University, UK Space Agency, Royal Society, Imperial College London, University of Sussex, Cardiff University, Chinese Academy of Sciences, Centre National d’Etudes Spatiales, Università degli Studi di Padova, Max-Planck-Gesellschaft, Centre National de la Recherche Scientifique, Max-Planck-Institut für Astronomie, Science and Technology Facilities Council, Japan Society for the Promotion of Science, National Astronomical Observatories, Chinese Academy of Sciences, U.S. Naval Observatory, Fermilab, Los Alamos National Laboratory
Awards: Astrophysics and Cosmology at the University of Sussex, Observational studies of galaxies in the era of violent evolution, G2189061100, PATT Travel for Oxford University, G4081850257, Astronomy and Astrophysics at Edinburgh, Development of the segmented mirror control system usinga self-phase-measurement method, PATT Travel for Oxford University, Astrophysics at Oxford: 2010-2015, Rolling Grant, Probing Dark Energy by Subaru FMOS Galaxy Redshift Survey, G7921347250, G8108304182, Astrophysics and Cosmology at the University of Sussex (2011-2016), Star formation and mass assembly at the highest redshifts
OpenAlex ID: W2138374682