Ammonia in dense clumps of filament WB 673
The aim of the study is to derive physical properties of the dense clumps in the region of massive star formation WB 673, which is situated in the giant molecular cloud G174+2.5. We used observations of the ammonia lines NH 3 (1,1), (2,2) and (3,3) that were made with the 100-m Effelsberg telescope. We determine the kinetic temperature and column density of ammonia towards the dust emission peaks of dense clumps WB 668, WB 673, S233-IR, G173.57+2.43.