The nature of warm , ionized gas outside of galaxies may illuminate several key galaxy evolutionary processes .
A serendipitous observation by the MaNGA survey has revealed a large , asymmetric H \alpha complex with no optical counterpart that extends \approx 8 \arcsec ( \approx 6.3 kpc ) beyond the effective radius of a dusty , starbursting galaxy .
This H \alpha extension is approximately three times the effective radius of the host galaxy and displays a tail-like morphology .
We analyze its gas-phase metallicities , gaseous kinematics , and emission-line ratios , and discuss whether this H \alpha extension could be diffuse ionized gas , a gas accretion event , or something else .
We find that this warm , ionized gas structure is most consistent with gas accretion through recycled wind material , which could be an important process that regulates the low-mass end of the galaxy stellar mass function .