Speaker
Description
We utilize a combination of radio continuum observations and optical integral field spectroscopic (IFS) data to explore the impact of radio AGNs on the evolution of their host galaxies at both global and sub-galactic scales. We construct a comprehensive radio-IFS sample comprising 5578 galaxies at redshift $z<0.15$ by cross-matching the LoTSS) with the MaNGA. We revisit the tight linear radio continuum - star formation relation and quantify its intrinsic scatter, then use them to classify 618 radio AGNs with excessive radio luminosities of $L\rm _{144MHz}>10^{21}\,W\,Hz^{-1}$. Massive quiescent galaxies dominate the radio AGN hosts, but the quenching level of radio AGN hosts shows no correlation with the jet luminosity. The mass assembly histories from stellar population synthesis agree with cosmological simulations incorporating radio-mode AGN feedback models. We observe that radio AGN hosts tend to grow faster, particularly evident in their central regions. By stacking the spectra in different radial bins of radio AGN hosts and their control sample, we find subtle emission line excess features in the nuclear region of radio AGNs, potentially indicative of connections between radio jets and the nuclear interstellar medium.
