Title: Unveiling Star Formation and AGNs in LBGs, BBGs, and (U) LIRGs with Synergy of 
optical and radio imagings

Abstract:
While recent multi-wavelength surveys are unveling the cosmic accretion activity hidden with 
dust obscurations even beyond the peak epoch, centimetric radio interferometry is the only 
means of tracing star-forming and AGN activities at sub-arcsecond resolution, in an extinction-
independent manner. This talk presents early results from deep 1.4 GHz Jansky VLA (JVLA) 
radio observations of 3 uJy/Beam at 1.5” resolution for Lyman Break Galaxies (LBGs), Balmer 
Break Galaxies (BBGs), and (Ultra) Luminos InfraRed Galaxies (LIRGs) detected in the NEP 
field.
Combining the radio data with the existing panchromatic observations, we can search thier 
hidden AGNs alternative to X-ray already obsereved with the Chandra and spatially resolve the 
star-forming galaxies. It will provide the definitive radio dataset for spatially-resolved, deep, 
broadband extragalactic studies until the SKA era. Our early results presented here will focus 
on the extinction-free morphology of SF and AGN in relation to their rest-frame optical and X-ray 
properties, the extinction-free AGN census and the fraction of nucleated/extended SF at z~3.