Comparison the Massive Star Formation Theorem of Collision and Accretion

Abstract

Massive star (M≥10 M⊙) is so luminous that the radiation pressure has negative effects to the formation itself. There are several mainstream theories could explain how massive star form in this particular surrounding. The collision theory and accretion would be discussed in this paper. Compared to the collision case, star is more likely to form massive by the accretion process. The simulation of collision case seems to work well. However, there is no evidence that astrophysicists have been found in the observation that supports this theory. The paper summarizes the simulation of two mainstream theories and the limitation for the research of high-mass star formation. The paper also proposes a possible method by analyzing the geometry of Wolf-Rayet star. With the development of models of gas distribution, hydrodynamical and mathematics work, it is necessary to calculate the gas structure in order to speculate the history of protostar in the center. These results could also provide reference and guidance for investigation of star formation.