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We present the discovery of neutral gas detected in both damped Ly$\alpha$absorption (DLA) and HI 21-cm emission outside of the stellar body of a galaxy,the first such detection in the literature. A joint analysis between the CosmicUltraviolet Baryon Survey and the MeerKAT Absorption Line Survey reveals an HIbridge connecting two interacting dwarf galaxies(log$(M_{\text{star}}/\text{M}_{\odot}) = 8.5 \pm 0.2$) that host a $z = 0.026$DLA with log[$N$(HI)/cm$^{-2}$]$ = 20.60 \pm 0.05$ toward the QSO J2339-5523($z_{\text{QSO}} = 1.35$). At impact parameters of $d = 6$ and $33$ kpc, thedwarf galaxies have no companions more luminous than $\approx 0.05L_{*}$ withinat least $\Delta v = \pm 300$ km s$^{-1}$ and $d \approx 350$ kpc. HI 21-cmemission is spatially coincident with the DLA at the 2-3$\sigma$ level perspectral channel over several adjacent beams. However, HI 21-cm absorption isnot detected against the radio-bright QSO; if the background UV and radiosources are spatially aligned, the gas is either warm or clumpy (with spintemperature to covering factor ratio $T_{s}/f_{c} > 1880$ K). VLT-MUSEobservations demonstrate that the $\alpha$-element abundance of the ionized ISMis consistent with the DLA ($\approx 10$% solar), suggesting that the neutralgas envelope is perturbed ISM gas. This study showcases the impact ofdwarf-dwarf interactions on the physical and chemical state of neutral gasoutside of star-forming regions. In the SKA era, joint UV and HI 21-cm analyseswill be critical for connecting the cosmic neutral gas content to galaxyenvironments.

Discovery of a damped Ly$\alpha$ absorber originating in a spectacular interacting dwarf galaxy pair at $z = 0.026$