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The dark cloud Lynds 723 (L723) is a low-mass star-forming region where oneof the few known cases of a quadrupolar CO outflow has been reported. Tworecent works have found that the radio continuum source VLA 2, towards thecentre of the CO outflow, is actually a multiple system of young stellarobjects (YSOs). Several line-emission nebulae that lie projected on theeast-west CO outflow were detected in narrow-band Halpha and [SII] images. Thespectra of the knots are characteristic of shock-excited gas (Herbig-Harospectra), with supersonic blueshifted velocities, which suggests an opticaloutflow also powered by the VLA 2 YSO system of L723. We imaged a field of ~5'X 5' centred on HH 223, which includes the whole region of the quadrupolar COoutflow with nir narrow-band filters . The H2 line-emission structures appeardistributed over a region of 5.5' (0.5 pc for a distance of 300 pc) at bothsides of the VLA 2 YSO system, with an S-shape morphology, and are projectedonto the east-west CO outflow. Most of them were resolved in smaller knottysubstructures. The [FeII] emission only appears associated with HH 223. Anadditional nebular emission from the continuum in Hc and Kc appears associatedwith HH 223-K1, the structure closest to the VLA 2 YSO system, and could betracing the cavity walls. We propose that the H2 structures form part of alarge-scale near-infrared outflow, which is also associated with the VLA 2 YSOsystem. The current data do not allow us to discern which of the YSOs of VLA 2is powering this large scale optical/near-infrared outflow.

HH 223: a parsec-scale H2 outflow in the star-forming region L723