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Smol\\v{c}i\\'c","submitted_at":"2019-03-28T18:36:25Z","abstract_excerpt":"We present the first systematic study of the radio continuum size evolution of star-forming galaxies (SFGs) over the redshift range $0.35<z<2.25$. We use the VLA COSMOS 3GHz map (noise $\\rm rms=2.3\\,\\mu Jy \\,beam^{-1}$, $\\theta_{\\rm beam}=0.75\\,\\rm arcsec$) to construct a mass-complete sample of 3184 radio-selected SFGs that reside on and above the main-sequence (MS) of SFGs. We find no clear dependence between the radio size and stellar mass, $M_{\\star}$, of SFGs with $10.5\\lesssim\\log(M_\\star/\\rm M_\\odot)\\lesssim11.5$. 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