Thursday

I will present recent results (Avery et al. 2021, MNRAS, 503, 5134) on ionised gas outflows among 2744 nearby (z~0.04) galaxies in the MaNGA integral-field spectroscopic survey. In this work we use the Hβ, [OIII], Hα, [NII], and [SII] line emission to investigate the incidence, strength, and scaling relations, as well as the physical conditions of gas flows driven by energetic processes related to star formation and ‘weak’ AGN.
We critically make use of the spatially resolved IFU observations to measure the radial extent of outflows within galaxies, and to identify low-luminosity AGN which are only dominant in light over star formation in the very central region of galaxies.
We find strong correlations between various outflow properties and host galaxy properties for which we provide scaling relations to compare to feedback processes in galaxy evolution models. In particular, we find mass outflow rate to be strongly correlated with SFR and, in active galaxies, with AGN luminosity. 
We further explore inclination dependencies to constrain wind geometries and find a correlation between mass-loading and inclination in disk galaxies. Using the broad- and narrow-component line ratios to assess the different ISM conditions in the outflow compared to the disk gas, we show that the outflow component has harder excitation, possibly due to shocks, and higher electron densities compared to the disk gas.
Finally, using the Na I D absorption feature, I will present a comparison of the wind properties in the neutral and ionised gas phases within the MaNGA sample.
Given that the majority of previous studies have focused on more extreme systems with higher SFRs and/or more luminous AGN, our study provides a unique view of the non-gravitational gaseous motions within ‘typical’ galaxies in the low-redshift Universe, where low-luminosity AGN and star formation contribute jointly to the observed outflow phenomenology.