IRAS 18153−1651: an H ii region with a possible wind bubble blown by a young main-sequence B star

摘要: We report the results of spectroscopic observations and numerical modelling H II region IRAS 18153-1651. Our study was motivated by discovery an optical arc two main-sequence stars spectral type B1 B3 near centre interpret as edge wind bubble (blown star), whose brightness is enhanced interaction with a photoevaporation flow from nearby molecular cloud. This interpretation implies that we deal unique case young massive star (the most member recently formed low-mass cluster) caught just tens thousands years after its stellar has begun to blow into surrounding dense medium. two-dimensional, radiation-hydrodynamics simulations around provide reasonable match observations, both in terms morphology absolute mid-infrared emission, verify age Taken together our strongly suggest have revealed first example blown B star.