We made two new sensitive (rms noise {sigma}n~1{mu}Jy/beam) high-resolution ({theta}=3.0" and {theta}=0.66" FWHM) S-band (2<{nu}~5{mu}Jy have angular structure {phi}<~0.66". The ratios of peak brightness in the 0.66" and 3" images have a distribution indicating that most {mu}Jy radio sources are quite compact, with a median Gaussian angular diameter =0.3"+/-0.1" FWHM and an rms scatter {sigma}{phi}<~0.3" of individual sizes. Most of our {mu}Jy radio sources obey the tight far-infrared/radio correlation, indicating that they are powered by star formation. The median effective angular radius enclosing half the light emitted by an exponential disk is ~/2.43~0.12", so the median effective radius of star-forming galaxies at redshifts z~1 is ~1.0kpc.

Cone search capability for table J/ApJ/856/67/table2 (Source catalog)