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

Hughes, T.M.; Ibar, E.; Villaneuva, V.; Aravena, M.; Baes, M.; Bourne, N.; Cooray, A.; Davies, L.J.M.; Driver, S.; Dunne, L.; Dye, S.; Eales, S.; Furlanetto, C.; Herrera-Camus, R.; Ivison, R.J.; van Kampen, E.; Lara-Lopez, M.A.; Maddox, S.; Micha?owski, M.J.; Oteo, I.; Smith, D.; Smith, M.W.L.; Valiante, E.; van der Werf, Paul; Viaene, S.; Xue, Y.Q.

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.

Citation

Hughes, T., Ibar, E., Villaneuva, V., Aravena, M., Baes, M., Bourne, N., …Xue, Y. (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. https://doi.org/10.1093/mnrasl/slx033

• Journal Article Type: Article
• Acceptance Date: Feb 23, 2017
• Publication Date: Feb 27, 2017
• Deposit Date: May 2, 2017
• Publicly Available Date: May 2, 2017
• Journal: Monthly Notices of the Royal Astronomical Society
• Print ISSN: 0035-8711
• Electronic ISSN: 1365-2966
• Publisher: Oxford University Press
• Peer Reviewed: Peer Reviewed
• Volume: 468
• Issue: 1
• Article Number: L103-L107
• Pages: L103-L107
• DOI: https://doi.org/10.1093/mnrasl/slx033
• Keywords: ISM: lines and bands – galaxies: ISM – submillimetre: galaxies
• Public URL: https://nottingham-repository.worktribe.com/output/844121
• Publisher URL: https://academic.oup.com/mnrasl/article/3055704/VALES:
• 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.