Herschel*-ATLAS: correlations between dust and gas in local submm-selected galaxies

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dc.contributor.authorDunne, L.
dc.contributor.authorBourne, N.
dc.contributor.authorBendo, G.J.
dc.contributor.authorSmith, M.W.L.
dc.contributor.authorClark, C.J.R.
dc.contributor.authorSmith, Daniel J.B.
dc.contributor.authorRigby, E.E.
dc.contributor.authorBaes, M.
dc.contributor.authorLeeuw, L.L.
dc.contributor.authorMaddox, S.J.
dc.contributor.authorThompson, M.A.
dc.contributor.authorBremer, M.N.
dc.contributor.authorCooray, Asantha
dc.contributor.authorDariush, A.
dc.contributor.authorde Zotti, G.
dc.contributor.authorDye, S.
dc.contributor.authorEales, S.
dc.contributor.authorHopwood, R.
dc.contributor.authorIbar, Edo
dc.contributor.authorIvison, R.J.
dc.contributor.authorJarvis, Matt
dc.contributor.authorMichalowski, M.J.
dc.contributor.authorRowlands, K.
dc.contributor.authorValiante, E.
dc.date.accessioned2016-02-16T20:33:03Z
dc.date.available2016-02-16T20:33:03Z
dc.date.issued2013
dc.description.abstractWe present an analysis of CO molecular gas tracers in a sample of 500 μ m-selected Herschel -ATLAS galaxies at z < 0 . 05 ( cz < 14990 km s − 1 ). Using 22 − 500 μ m photom- etry from WISE , IRAS and Herschel , with H i data from the literature, we investigate correlations between warm and cold dust, and tracers of the gas in different phases. The correlation between global CO(3–2) line fluxes and FIR–submm fl uxes weakens with increasing IR wavelength ( λ & 60 μ m), as a result of colder dust being less strongly associated with dense gas. Conversely, CO(2–1) and H i line fluxes both ap- pear to be better correlated with longer wavelengths, suggesting that cold dust is more strongly associated with diffuse atomic and molecular gas phases, co nsistent with it being at least partially heated by radiation from old stellar populations . The increased scatter at long wavelengths implies that sub-millimetre fluxes are a po orer tracer of SFR. Fluxes at 22 and 60 μ m are also better correlated with diffuse gas tracers than dense CO(3–2), probably due to very-small-grain emission in the diffu se interstellar medium, which is not correlated with SFR. The FIR/CO luminosity ratio a nd the dust mass/CO luminosity ratio both decrease with increasing luminosit y, as a result of either correlations between mass and metallicity (changing CO/H 2 ) or between CO luminosity and excitation [changing CO(3–2)/CO(1–0)].
dc.description.accreditationWeb of Science
dc.identifier.citationBourne, N., et al. (2013). Herschel*-ATLAS: correlations between dust and gas in local submm-selected galaxies. Monthly Notices of the Royal Astronomical Society, 436 (1): 479-502.
dc.identifier.issn0035-8711
dc.identifier.urihttp://hdl.handle.net/10566/2075
dc.rights© 2013 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. This is the author version of the article accepted for publication in the Monthly Notices of the Royal Astronomical Society. The published version of this article is available at https://mnras.oxfordjournals.org/content/436/1/479.
dc.source.urihttp://dx.doi.org/v10.1093/mnras/stt1584
dc.subjectInterstellar medium (ISM)
dc.subjectRadio lines
dc.subjectGalaxies
dc.subjectSubmillimeter galaxies
dc.subjectSpectral energy distribution (SED)
dc.subjectHerschel
dc.titleHerschel*-ATLAS: correlations between dust and gas in local submm-selected galaxies

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