Low-mass black holes in Sy1. III. SKA radio sources

Yet the number of low-mass AGNs with radio detection is rather limited so far (~40 in total). In this work, we make two efforts to search for radio counterparts for the largest sample of optically selected low-mass AGNs.

First, we collect counterparts from the recent data releases of Square Kilometre Array (SKA) pathfinders such as LOFAR Two-meter Sky Survey (LoTSS). Additionally, we deeply mine in Faint Images of the Radio Sky at Twenty-Centimeters (FIRST), fitting the FIRST images of the optical AGNs with an elaborate procedure optimized to detect faint radio sources. We have obtained 151 radio sources (mainly from the SKA pathfinders), including 102 new reliable sources (signal-to-noise ratio, hereafter S/N, >=5) and 23 new candidates (3.5<=S/N<5).