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Morokuma K.,Nobeyama Radio Observatory NRO | Baba J.,Tokyo Institute of Technology | Sorai K.,Hokkaido University | Kuno N.,Nobeyama Radio Observatory NRO | Kuno N.,University of Tsukuba
Proceedings of the International Astronomical Union | Year: 2014

We found stellar mass-dependent evolution of galactic molecular gas fractions (fmol = Mmol/MBlack star+Mmol, Mmol: molecular gas mass, MBlack star : stellar mass) where less massive galaxies have decreased fmol from z = 1 whereas massive galaxies have already had low fmol until z = 1. Comparison of the observed quantities (fmol, optical and near infra-red [NIR] colors, specific star formation rate [sSFR = SFR/MBlack star]) with mass evolution models suggests that less massive galaxies had high fmol at z = 1 thanks to recent gas accretion. © International Astronomical Union 2015. Source

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