恒星形成区G10.32-0.15中反馈机制的研究OA北大核心CSTPCD

Feedback plays an important role in star formation and strongly impacts the for-mation of stars and planets,and the evolution of the star cluster and the parental molecular cloud.Multi-wavelength studies of star forming region G10.32-0.15 were conducted using the NH3(1,1)and NH3(2,2)spectrum line data of the ammonia molecule observed with the GBT and with the inclusion of multi-wavelength continuum data from the cm,sub-mm to infrared bands.The infrared star cluster and dense dust clumps C1,C2,C3,C4 and C5 are identified in the source based on the multi-wavelength infrared and sub-mm continuum data.The NH3 velocity-integrated intensity distribution is clearly associated with the dense dust distribution detected by 870µm emission,indicating that NH3 is a good dense gas tracer.The distribution of velocity,velocity dispersion,rotation temperature,NH3 column density and filling factor can be derived by fitting a radiation transfer model to the NH3(1,1)and NH3(2,2)data under the assumption of Local Thermal Equilibrium.Furthermore,the ki-netic temperature,the sound speed,the non-thermal velocity dispersion,the ratio between thermal pressure and non-thermal pressure,and the Mach number are derived based on those fitted parameters.From the above results,the dense gas in G10.32-0.15 is affected by multiple feedback processes:the dense gas in C1 is likely affected by thermal feedback,the dense gas in C2 and C3 is likely affected by explosive feedback,and the dense gas in C4 and C5 is likely affected by momentum feedback.Therefore,very complicated interactions exist between the infrared star cluster and the surrounding gas and different feedback mechanisms maybe dominate the different regions in G10.32-0.15.