A Catalog of Broad Hα and Hβ Active Galactic Nuclei in MaNGA

Abstract

Broad H$\hat{I}\pm$ and H${\hat{I}}^2$ 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 H$\hat{I}\pm$ galaxies and 801 broad-line H${\hat{I}}^2$ galaxies in the catalog. In total, we detect 1,042 unique broad-line galaxies with luminosities between 10${}^{37}$ - 10${}^{43}$ erg s${}^{-1}$; 60 feature both broad H$\hat{I}\pm$ and broad H${\hat{I}}^2$ 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 H${\hat{I}}^2$ sample. In addition, we find that both samples feature a higher fraction of galaxy mergers (44% for the broad H$\hat{I}\pm$ sample and 43% for the broad H${\hat{I}}^2$ sample), compared to the full MaNGA galaxy sample (26%), which suggests that merger-driven fueling is strongly active in our sample.

15 pages, 7 figures