VALES: III. The calibration between the dust continuum and interstellar gas content of star-forming galaxies

Hughes, T.M. and Ibar, E. and Villaneuva, V. and Aravena, M. and Baes, M. and Bourne, N. and Cooray, A. and Davies, L.J.M. and Driver, S. and Dunne, L. and Dye, S. and Eales, S. and Furlanetto, C. and Herrera-Camus, R. and Ivison, R.J. and van Kampen, E. and Lara-Lopez, M.A. and Maddox, S. and Michałowski, M.J. and Oteo, I. and Smith, D. and Smith, M.W.L. and Valiante, E. and van der Werf, Paul and Viaene, S. and Xue, Y.Q. (2017) VALES: III. The calibration between the dust continuum and interstellar gas content of star-forming galaxies. Monthly Notices of the Royal Astronomical Society, 468 (1). L103-L107. ISSN 1365-2966

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Abstract

We present the calibration between the dust continuum luminosity and interstellar gas content obtained from the Valparaiso ALMA Line Emission Survey (VALES) sample of 67 main-sequence star-forming galaxies at 0.02 < z < 0.35. We use CO(1–0) observations from the Atacama Large Millimetre/submillimetre Array to trace the molecular gas mass, MH2, and estimate the rest-frame monochromatic luminosity at 850 µm, Lν850, by extrapolating the dust continuum from MAGPHYS modelling of the far-ultraviolet to submillimetre spectral energy distribution sampled by the Galaxy And Mass Assembly survey. Adopting αCO = 6.5 (K km s−1 pc2)−1, the average ratio of Lν850 /MH2 = (6.4 ± 1.4)× 1019 erg s−1 Hz−1 M−1Θ, in excellent agreement with literature values. We obtain a linear fit of log10 (MH2/MΘ) = (0.92 ± 0.02) log10(Lν850 /erg s−1 Hz−1) − (17.31 ± 0.59). We provide relations between Lν850, MH2 and MISM when combining the VALES and literature samples, and adopting a Galactic αCO value.

Item Type: Article
Additional Information: This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©2017 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
Keywords: ISM: lines and bands – galaxies: ISM – submillimetre: galaxies
Schools/Departments: University of Nottingham, UK > Faculty of Science > School of Physics and Astronomy
Identification Number: 10.1093/mnrasl/slx033
Depositing User: Dye, Simon
Date Deposited: 02 May 2017 13:01
Last Modified: 13 Oct 2017 08:52
URI: http://eprints.nottingham.ac.uk/id/eprint/42250

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