A complete catalogue of broad-line AGNs and double-peaked emission lines from MaNGA integral-field spectroscopy of 10K galaxies: stellar population of AGNs, supermassive black holes, and dual AGNs

We analyse the integral field spectroscopy data for the approximate to 10 000 galaxies in final data release of the MaNGA survey. We identify 188 galaxies for which the emission lines cannot be described by single Gaussian components. These galaxies can be classified into (1) 38 galaxies with broad H alpha and [O III] lambda 5007 lines, (2) 101 galaxies with broad Halines but no broad [O III] lambda 5007 lines, and (3) 49 galaxies with double-peaked narrow emission lines. Most of the broad-line galaxies are classified as active galactic nuclei (AGNs) from their line ratios. The catalogue helps us further understand the AGN-galaxy coevolution through the stellar population of broad-line region host galaxies and the relation between broad lines' properties and the host galaxies' dynamical properties. The stellar population properties (including mass, age, and metallicity) of broad-line host galaxies suggest there is no significant difference between narrow-line Seyfert-2 galaxies and Type-1 AGNs with broad Halines. We use the broad-H alpha line width and luminosity to estimate masses of black hole in these galaxies, and test the M-BH-sigma(e) relation in Type-1 AGN host galaxies. Furthermore, we find three dual AGN candidates supported by radio images from the VLA FIRST survey. This sample may be useful for further studies on AGN activities and feedback processes.

Automated summary

We analyzed the integral field spectroscopy data of approximately 10,000 galaxies in the final data release of the MaNGA survey. We found 188 galaxies with emission lines that cannot be described by single Gaussian components. These galaxies can be classified into three categories: (1) 38 galaxies with broad H alpha and [O III] lambda 5007 lines, (2) 101 galaxies with broad H alpha lines but no broad [O III] lambda 5007 lines, and (3) 49 galaxies with double-peaked narrow emission lines. Most of the broad-line galaxies are active galactic nuclei (AGNs) according to their line ratios. The catalog provides insights into AGN-galaxy coevolution and the relationship between broad-line properties and host galaxies' dynamical properties.