Stellar contents in the Sh2-112 cloud complex

At a distance of ~2.1kpc, this HII complex, itself 3pc in radius, is illuminated by the massive star (O8 V) BD+45 3216. The associated molecular cloud extends in angular scales of 2.0x0.83{deg}, corresponding to linear sizes of 73pc by 30pc, along the Galactic longitude.

The high-resolution (30") extinction map reveals a chain of dust clumps aligned with the filament-like structure with an average extinction of A_V_~2.78mag, varying up to a maximum of ~17mag. Our analysis led to identification of a rich population (~500) of young (average age of ~1Myr) stars, plus a numerous number (~350) of H{alpha} emitters, spatially correlated with the filamentary clouds. Located near the edge of the cloud, the luminous star BD+45 3216 has created an arc-like pattern as the ionizing radiation encounters the dense gas, forming a blister-shaped morphology.