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Fig. 7.

image

Relation between the H I gas fraction and the linear combination of NUV − r colour and stellar surface mass density (μ*) in the SDSS-z band. The low-z calibrating sample has been divided into two sub-samples according to NUV − r colour: The red points are galaxies with (NUV − r) > 3.5, and the blue points are galaxies with (NUV − r) < 3.5. The fitting parameters are labelled at the top left of the figure.

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