An Overdensity of Red Galaxies around the Hyperluminous Dust-obscured Quasar W1835+4355 at z = 2.3

\emph{Wide-field Infrared Survey Explorer} all-sky survey has discovered a new population of hot dust-obscured galaxies (Hot DOGs), which been confirmed to be dusty quasars. Previous statistical studies have found significant overdensities sub-millimeter and mid-IR selected around Hot DOGs, indicating they may reside in dense regions. Here we present the near-infrared ($J$ $K_s$ bands) observations over $7.5'\times 7.5'$ field centered on DOG W1835$+$4355 at $z \sim 2.3$ using wide-field infrared camera Palomar 200-inch telescope. We use color criterion $J-K_s>2.3$ for objects with $K_s<20$, select Distant Red Galaxies (DRGs). find excess number density DRGs compared three control fields, by factor about 2. The overdensity red are consistent multi-wavelength environment suggesting that DOGs good tracer regions high redshift. do not densest region traced itself. A possible scenario is undergoing merging process, lowers local its surrounding region.