Evidence for a cloud–cloud collision in Sh2-233 triggering the formation of the high-mass protostar object IRAS 05358+3543

ABSTRACT We have carried out a new kinematical analysis of the molecular gas in Sh2-233 region by using CO J = 2–1 data taken at ∼0.5 pc resolution. The consists filamentary cloud 5-pc length with 1.5-pc width where two dense cores are embedded. filament lies between clouds, which velocity difference 2.7 km s−1 and extended over ∼5 pc. frame scenario that clouds colliding each other compressed them to form Myr is perpendicular collision. It likely collision formed not only but also cores. One associated high-mass protostellar candidate IRAS 05358+3543, representative protostar. In monolithic collapse scheme high mass star formation, compact core 100 M⊙ within volume 0.1 radius assumed as initial condition, whereas formation such remained unexplained previous works. argue proposed step efficiently collects into radius. This lends support for cloud–cloud an essential process forming core, 05358+3543.