Catalog of Broad H{α} and H{eta} Active Galactic Nuclei in MaNGA

Broad Hα and Hβ emission lines (FWHM > 1,000 km s⁻¹) are incredibly efficient tracers of the high-velocity clouds encircling Active Galactic Nuclei (AGN). As a result, we search for these broad line AGN in the Sloan Digital Sky Survey's Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) catalog. We identify 301 broad-line Hα galaxies and 801 broad-line Hβ galaxies in the catalog. In total, we detect 1,042 unique broad-line galaxies with luminosities between 10³⁷ - 10⁴³ erg s⁻¹ and inferred supermassive black hole masses between 10⁵ - 10¹⁰ M_; 60 feature both broad Hα and broad Hβ emission. We also determine that the broad line region radius ranges between 0.01 - 46 light days, with a median radius of 0.1 light days (0.02 pc) for our broad Hβ sample. In addition, we find that both samples feature a higher fraction of galaxy mergers (44% for the broad Hα sample and 43% for the broad Hβ sample), compared to the full MaNGA galaxy sample (26%), which suggests that merger-driven fueling is strongly active in our sample.