The Radiation Field Distribution In Gould Belt Molecular Clouds

Stars are formed in the molecular cloud of interstellar medium.In the process of star formation,the ultraviolet radiation around the molecular cloud is very important to the chemical evolution.Therefore,the study of ultraviolet radiation is very necessary for us to understand the formation and evolution of stars.Ultra violet radiation is mainly provided by massive stars(O / B stars),and the ultraviolet radiation around the molecular cloud can affect the chemical evolution of the molecular cloud.Ultraviolet radiation is also an important mechanism of molecular cloud heating.The Gould belt is located in the Milky Way galaxy.Most areas are close to us,within 1 Kpc,and there are many star forming regions,such as low and intermediate star forming region Ophiuchus,massive star forming region Orion(the nearest massive star forming region to us),etc.Under different radiation field intensities,there is some correlation between the optical depth and the temperature of dust.We Use the data from the Herschel Gould belt Survey of the Herschel Space Observatory of ESA,and apply the program DUSTY to study the radiation field distribution of molecular clouds in the Gould Belt.Finally,the star formation rate obtained by calculating YSOs is used to compare with the radiation field intensity obtained by us.We find that there is a good correlation between star formation rate and UV in the region with OB star distribution.