X-Ray and Radio Emission from Ultraviolet-selected Star-forming Galaxies at Redshifts 1.5 z 3.0 in the GOODS-North Field

We have examined the stacked radio and X-ray emission from UV-selected galaxies spectroscopically confirmed to lie in the redshift range 1.5 ≲ z ≲ 3.0 in the Great Observatories Origins Deep Survey-North field to determine their average extinction and star formation rates (SFRs). The X-ray and radio data are obtained from the Chandra 2 Ms survey and the Very Large Array, respectively. There is a good agreement among the X-ray, radio, and dereddened UV estimates of the average SFR for our sample of z ~ 2 galaxies of ~50 M ☉ yr -1 , indicating that the locally calibrated SFR relations appear to be statistically valid in the redshift range 1.5 ≲ z ≲ 3.0. We find that UV-estimated SFRs (uncorrected for extinction) underestimate the bolometric SFRs as determined from the 2-10 keV X-ray luminosity by a factor of ~4.5-5.0 for galaxies over a large range in redshift, 1.0 ≲ z ≲ 3.5.