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We investigate the evolution of the gas mass fraction for galaxies in theCOSMOS field using submillimetre emission from dust at 850$\mu$m. We usestacking methodologies on the 850$\mu$m S2COSMOS map to derive the gas massfraction of galaxies out to high redshifts, 0 <= $z$ <= 5, for galaxies withstellar masses of $10^{9.5} < M_* (\rm M_{\odot}) < 10^{11.75}$. In comparisonto previous literature studies we extend to higher redshifts, include morenormal star-forming galaxies (on the main sequence), and also investigate theevolution of the gas mass fraction split by star-forming and passive galaxypopulations. We find our stacking results broadly agree with scaling relationsin the literature. We find tentative evidence for a peak in the gas massfraction of galaxies at around $z$ ~ 2.5-3, just before the peak of the starformation history of the Universe. We find that passive galaxies areparticularly devoid of gas, compared to the star-forming population. We findthat even at high redshifts, high stellar mass galaxies still containsignificant amounts of gas.

S2COSMOS: Evolution of Gas Mass with Redshift Using Dust Emission