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VALES I : the molecular gas content in star-forming dusty H-ATLAS galaxies up to z=0.35
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dc.contributor.author | Villanueva, V. | |
dc.contributor.author | Ibar, E. | |
dc.contributor.author | Hughes, T. M. | |
dc.contributor.author | Lara-López, M. A. | |
dc.contributor.author | Dunne, L. | |
dc.contributor.author | Eales, S. | |
dc.contributor.author | Ivison, R. J. | |
dc.contributor.author | Aravena, M. | |
dc.contributor.author | Baes, M. | |
dc.contributor.author | Bourne, N. | |
dc.contributor.author | Cassata, P. | |
dc.contributor.author | Cooray, A. | |
dc.contributor.author | Dannerbauer, H. | |
dc.contributor.author | Davies, L. J. M. | |
dc.contributor.author | Driver, S. P. | |
dc.contributor.author | Dye, S. | |
dc.contributor.author | Furlanetto, C. | |
dc.contributor.author | Herrera-Camus, R. | |
dc.contributor.author | Maddox, S. J. | |
dc.contributor.author | Michalowski, M. J. | |
dc.contributor.author | Molina, J. | |
dc.contributor.author | Riechers, D. | |
dc.contributor.author | Sansom, A. E. | |
dc.contributor.author | Smith, M. W. L. | |
dc.contributor.author | Rodighiero, G. | |
dc.contributor.author | Valiante, E. | |
dc.contributor.author | Werf, P. van der | |
dc.date.accessioned | 2018-01-19T17:30:14Z | |
dc.date.available | 2018-01-19T17:30:14Z | |
dc.date.issued | 2017-10 | |
dc.identifier | 252096893 | |
dc.identifier | be58f016-0dd8-4013-9c14-6addd8189b6b | |
dc.identifier | 85029509115 | |
dc.identifier.citation | Villanueva , V , Ibar , E , Hughes , T M , Lara-López , M A , Dunne , L , Eales , S , Ivison , R J , Aravena , M , Baes , M , Bourne , N , Cassata , P , Cooray , A , Dannerbauer , H , Davies , L J M , Driver , S P , Dye , S , Furlanetto , C , Herrera-Camus , R , Maddox , S J , Michalowski , M J , Molina , J , Riechers , D , Sansom , A E , Smith , M W L , Rodighiero , G , Valiante , E & Werf , P V D 2017 , ' VALES I : the molecular gas content in star-forming dusty H -ATLAS galaxies up to z=0.35 ' , Monthly Notices of the Royal Astronomical Society , vol. 470 , no. 4 , pp. 3775-3805 . https://doi.org/10.1093/mnras/stx1338 | en |
dc.identifier.issn | 0035-8711 | |
dc.identifier.other | ArXiv: http://arxiv.org/abs/1705.09826v2 | |
dc.identifier.uri | https://hdl.handle.net/10023/12538 | |
dc.description.abstract | We present an extragalactic survey using observations from the Atacama Large Millimeter/submillimeter Array (ALMA) to characterize galaxy populations up to z = 0.35: the Valparaíso ALMA Line Emission Survey (VALES). We use ALMA Band-3 CO(1–0) observations to study the molecular gas content in a sample of 67 dusty normal star-forming galaxies selected from the Herschel Astrophysical Terahertz Large Area Survey (H-ATLAS). We have spectrally detected 49 galaxies at >5σ significance and 12 others are seen at low significance in stacked spectra. CO luminosities are in the range of (0.03–1.31) × 1010 K km s−1 pc2, equivalent to log(Mgas/M⊙)=8.9--10.9 assuming an αCO = 4.6 (K km s−1 pc2)−1, which perfectly complements the parameter space previously explored with local and high-z normal galaxies. We compute the optical to CO size ratio for 21 galaxies resolved by ALMA at ∼3.5 arcsec resolution (6.5 kpc), finding that the molecular gas is on average ∼ 0.6 times more compact than the stellar component. We obtain a global Schmidt–Kennicutt relation, given by log[ΣSFR/(M⊙yr−1kpc−2)]=(1.26±0.02)×log[ΣMH2/(M⊙pc−2)]−(3.6±0.2). We find a significant fraction of galaxies lying at ‘intermediate efficiencies’ between a long-standing mode of star formation activity and a starburst, specially at LIR = 1011–12 L⊙. Combining our observations with data taken from the literature, we propose that star formation efficiencies can be parametrized by log[SFR/MH2]=0.19×(logLIR−11.45)−8.26−0.41 × arctan[−4.84(logLIR−11.45)]. Within the redshift range we explore (z < 0.35), we identify a rapid increase of the gas content as a function of redshift. | |
dc.format.extent | 13733624 | |
dc.language.iso | eng | |
dc.relation.ispartof | Monthly Notices of the Royal Astronomical Society | en |
dc.subject | ISM: lines and bands | en |
dc.subject | Galaxies: high-redshift | en |
dc.subject | Galaxies: ISM | en |
dc.subject | Infrared: galaxies | en |
dc.subject | Submillimetre: galaxies | en |
dc.subject | QB Astronomy | en |
dc.subject | QC Physics | en |
dc.subject | 3rd-DAS | en |
dc.subject.lcc | QB | en |
dc.subject.lcc | QC | en |
dc.title | VALES I : the molecular gas content in star-forming dusty H-ATLAS galaxies up to z=0.35 | en |
dc.type | Journal article | en |
dc.contributor.institution | University of St Andrews. School of Physics and Astronomy | en |
dc.identifier.doi | https://doi.org/10.1093/mnras/stx1338 | |
dc.description.status | Peer reviewed | en |
dc.identifier.url | http://arxiv.org/abs/1705.09826v2 | en |
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