2MASX J00551965+3424182 , the SIMBAD biblio

We identified 15,658 NRAO VLA Sky Survey (NVSS) radio sources among the 55,288 2 Micron All-Sky Survey eXtended (2MASX) galaxies brighter than k_20fe = 12.25 at λ = 2.16 µm and covering the Ω = 7.016 sr of sky defined by J2000 δ > -40° and | b| > 20^○. The complete sample of 15,043 galaxies with 1.4 GHz flux densities S >= 2.45 mJy contains a 99.9% spectroscopically complete subsample of 9517 galaxies with k_20fe <= 11.75. We used only radio and infrared data to quantitatively distinguish radio sources powered primarily by recent star formation from those powered by active galactic nuclei. The radio sources with log[L(WHz^–1)]> 19.3 that we used to derive the local spectral luminosity and power-density functions account for >99% of the total 1.4 GHz spectral power densities U_SF=(1.54±0.20)×10¹⁹WHz^–1Mpc^–3 and U_AGN=(4.23±0.78)×10¹⁹WHz^–1Mpc^–3 in the universe today, and the spectroscopic subsample is large enough that the quoted errors are dominated by cosmic variance. The recent comoving star formation rate density indicated by U_SF is ψ~0.015M_☉yr^–1Mpc^–3.