Confirmation of a Substantial Discrepancy between Radio and UV-IR Measures of the Star Formation Rate Density at 0.2 &lt; <i>z</i> &lt; 1.3

We present the initial sample of redshifts for 3839 galaxies in the MeerKAT DEEP2 field-the most sensitive similar to 1.4 GHz radio field yet observed with sigma(n) = 0.55 mu Jy beam(-1), reaching the confusion limit. Using a spectrophotometric technique combining coarse optical spectra with broadband photometry, we obtain redshifts with sigma(z )less than or similar to 0.01(1 + z), as determined from repeat observations. The resulting radio luminosity functions between 0.2 < z < 1.3 from our sample of 3839 individual galaxies are in remarkable agreement with those inferred from previous modeling of radio source counts, confirming a greater than or similar to 50% excess in radio-based star formation rate density (SFRD) (z) measurements at 0.2 < z < 1.3 compared to those from the UV-IR. Several sources of systematic error are discussed-totalling similar to 0.13 dex when added in quadrature. Even in the event that all systematic errors work to decrease the radio-based SFRD values, they are incapable of reconciling differences between the radio-based measurements with those from the UV-IR at 0.5 < z < 1.3. We conclude that significant work remains to have confidence in a full accounting of the star formation budget of the Universe.