SDSS DR16 galaxy counterparts to IRAS sources

Our meticulous crossmatching technique significantly enhances the reliability of ULIRG identification, resulting in the identification of 283 reliable ULIRGs, including 102 new detections, while discarding 120 previously reported false sources.

Covering a redshift range of z=0.018-0.996, with a median redshift of \bar{z}=0.259, our uniform sample reveals apparent interaction features in approximately 40% of ULIRGs, increasing to 92% for those with z<0.1. Through optical spectra analysis, it is indicated that over 58% of ULIRGs host an active galactic nucleus (AGN), which is twice as high as detections based solely on infrared colors. Moreover, a pronounced excess of radio emissions associated with AGN activity results in a steeper radio-far-infrared correlation.