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We present a 1.4 GHz Karl G. Jansky Very Large Array (VLA) study of a sampleof early-type galaxies (ETGs) from the volume- and magnitude-limited ATLAS-3Dsurvey. The radio morphologies of these ETGs at a resolution of 5" are diverseand include sources that are compact on sub-kpc scales, resolved structuressimilar to those seen in star-forming spiral galaxies, and kpc-scale radiojets/lobes associated with active nuclei. We compare the 1.4 GHz, moleculargas, and infrared (IR) properties of these ETGs. The most CO-rich ATLAS-3D ETGshave radio luminosities consistent with extrapolations from H_2-mass-derivedstar formation rates from studies of late-type galaxies. These ETGs also followthe radio-IR correlation. However, ETGs with lower molecular gas masses tend tohave less radio emission relative to their CO and IR emission compared tospirals. The fraction of galaxies in our sample with high IR-radio ratios ismuch higher than in previous studies, and cannot be explained by a systematicunderestimation of the radio luminosity due to the presence extended,low-surface-brightness emission that was resolved-out in our VLA observations.In addition, we find that the high IR-radio ratios tend to occur at low IRluminosities, but are not associated with low dynamical mass or metallicity.Thus, we have identified a population of ETGs that have a genuine shortfall ofradio emission relative to both their IR and molecular gas emission. A numberof mechanisms may conspire to cause this radio deficiency, including abottom-heavy stellar initial mass function, weak magnetic fields, a higherprevalence of environmental effects compared to spirals and enhanced cosmic raylosses.

Star Formation in Nearby Early-Type Galaxies: The Radio Continuum Perspective