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We present Atacama Large Millimeter/sub-millimeter Array (ALMA) Cycle-2observations of the HBC 494 molecular outflow and envelope. HBC 494 is an FUOri-like object embedded in the Orion A cloud and is associated with thereflection nebulae Re50 and Re50N. We use $^{12}$CO, $^{13}$CO and C$^{18}$Ospectral line data to independently describe the outflow and envelopestructures associated with HBC 494. The moment-1 map of the $^{12}$CO emissionshows the widest outflow cavities in a Class I object known to date (openingangle $\sim$ 150$^{^{\circ}}$). The morphology of the wide outflow is likely tobe due to the interaction between winds originating in the inner disc and thesurrounding envelope. The low-velocity blue- and red-shifted $^{13}$CO andC$^{18}$O emission trace the rotation and infall motion of the circumstellarenvelope. Using molecular line data and adopting standard methods forcorrecting optical depth effects, we estimate its kinematic properties,including an outflow mass on the order of 10$^{-1}$ M$_{\odot}$. Consideringthe large estimated outflow mass for HBC 494, our results support recenttheoretical work suggesting that wind-driven processes might dominate theevolution of protoplanetary discs via energetic outflows.

The ALMA Early Science View of FUor/EXor objects. II. The Very Wide Outflow Driven by HBC 494