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The BD+40\degree4124 region was observed with high angular and spectralresolution with the German heterodyne instrument GREAT in CO J = 13 \rightarrow12 and [CII] on SOFIA. These observations show that the [CII] emission is verystrong in the reflection nebula surrounding the young Herbig Ae/Be starBD+40\degree4124. A strip map over the nebula shows that the [CII] emissionapproximately coincides with the optical nebulosity. The strongest [CII]emission is centered on the B2 star and a deep spectrum shows that it has faintwings, which suggests that the ionized gas is expanding. We also see faint CO J= 13 \rightarrow 12 at the position of BD+40\degree4124, which suggests thatthe star may still be surrounded by an accretion disk.We also detected [CII]emission and strong CO J = 13 \rightarrow 12 toward V1318 Cyg. Here the [CII]emission is fainter than in BD+40\degree4124 and appears to come from theoutflow, since it shows red and blue wings with very little emission at thesystemic velocity, where the CO emission is quite strong. It therefore appearsthat in the broad ISO beam the [CII] emission was dominated by the reflectionnebula surrounding BD+40\degree4124, while the high J CO lines originated fromthe adjacent younger and more deeply embedded binary system V1318 Cyg.

GREAT [CII] and CO observations of the BD+40{\deg}4124 region