Cygnus OB2 Complex survey with Subaru HSC

The young massive association of Cygnus OB2, with a strong feedback from massive stars, is an ideal target to study the effect of extreme environmental conditions on its extensive low-mass population. We aim to perform deep multiwavelength studies to understand the role of stellar feedback on the IMF, brown dwarf fraction and circumstellar disc properties in the region.

We introduce here, the deepest and widest optical photometry of 1.5{deg} diameter region centred at Cygnus OB2 in r_2_, i_2_, z, and Y-filters, using Subaru Hyper Suprime-Cam (HSC). This work presents the data reduction, source catalogue generation, data quality checks, and preliminary results about the pre-main sequence sources. We obtain 713529 sources in total, with detection down to ~28, 27, 25.5, and 24.5 mag in r_2_, i_2_, z, and Y-band, respectively, which is ~ 3 - 5 mag deeper than the existing Pan-STARRS and GTC/OSIRIS photometry.