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

Hughes, T. M., Ibar, E., Villanueva, V., Aravena, M., Baes, M., Bourne, N., Cooray, A., Davies, L. J. M., Driver, S., Dunne, Loretta, Dye, S., Eales, Stephen, Furlanetto, C., Herrera-Camus, R., Ivison, R. J., van Kampen, E., Lara-López, M. A., Maddox, Steve, Micha?owski, M. J., Oteo, I., Smith, D., Smith, Matthew, Valiante, Elisabetta, van der Werf, P., 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: Letters 468 (1) , L103-L107. 10.1093/mnrasl/slx033

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Abstract

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

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QB Astronomy
Publisher: Oxford University Press
ISSN: 1745-3925
Date of First Compliant Deposit: 14 July 2017
Date of Acceptance: 23 February 2017
Last Modified: 17 Jul 2017 15:44
URI: http://orca.cf.ac.uk/id/eprint/102406

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