Active Galactic Nuclei (AGN) feedback is one of the most important mechanismsin galaxy evolution. It is usually found in massive galaxies and regulates starformation. Although dwarf galaxies are assumed to be regulated by supernovafeedback, recent studies show evidence for the presence of AGN outflows andfeedback in dwarf galaxies. We investigate the presence of AGN outflows in asample of 2292 dwarf galaxies with AGN signatures drawn from the MaNGA survey.Thanks to the integral field unit data from MaNGA we are able to spatiallyresolve these outflows and study their kinematics and energetics. Using theGELATO Python code, we fit the AGN-stacked spectrum of each galaxy, which isthe stack of all the spaxels classified as AGN by emission line diagnosticdiagrams, and in particular the [OIII]$\lambda$5007\AA\ emission line. If thegalaxies show a broad [OIII] emission line component in the stacked spectrum,we run GELATO through all the spaxels that are classified as AGN in theemission line diagnostic diagrams. We find 11 new dwarf galaxies that presentoutflow signatures based on the presence of a broad [OIII] emission linecomponent. Their velocity W$_{80}$ (width containing 80$\%$ of the flux of the[OIII]$\lambda$5007\AA\ emission line) ranges from 205 to 566 km s$^{-1}$ andthe kinetic energy rate ranges from $\sim10^{35}$ to $\sim10^{39}$ ergs$^{-1}$. Stellar processes are unlikely to explain these outflow kineticenergy rates in the case of seven dwarf galaxies. We find a correlation betweenthe W$_{80}$ velocity and the [OIII] luminosity and between the kinetic energyrate of the outflow and the bolometric luminosity spanning from massive todwarf galaxies. This suggests a similar behavior between the AGN outflows inthe dwarf galaxy population with those in massive galaxies.

Based on a high-sensitivity HI survey using the Five-hundred-meter ApertureSpherical radio Telescope (FAST), we identified an isolated HI cloud with asystem velocity of ~127.0 km/s, which is associated with an optical galaxyKK153 in space. The HI gas of KK153 shows a typical disk-galaxy structure.Using the Baryonic Tully-Fisher relation, we obtained that the distance toKK153 is 2.0_{-0.8}^{+1.7} Mpc. Adopting such distance, we derived a stellarmass of 4.1_{-2.6}^{+10.0}*10^{5} Msun and a neutral gas fraction of 0.63,implying that KK153 is a gas-rich ultra-faint dwarf (UFD) galaxy in the LocalGroup or its outskirts. KK153 shows a cool (~200 K) and warm (~7400 K)two-phase neutral medium. The g-r color distribution of KK153 suggests that newstars are mostly forming in its inner disk. The dynamical mass of KK153 is6.9_{-3.0}^{+5.5}*10^{7} Msun, which is about 60 times larger than its baryonicmatter. Detection of such a low-mass and gas-rich halo poses a challenge to thetheory of cosmic reionization.