Colloq Abstract -Sakai
Jan 6
11am Mountain
Nami Sakai (Riken)
Importance of Centrifugal Barrier in Physics and Chemistry of Disk Formation
Abstract
Toward a thorough understanding of planet formation around low-mass protostars, one of the most important targets to be explored is formation of a Keplerian disk in the early stage of protostellar evolution. Furthermore, the physical process of the disk formation will significantly affect an initial chemical composition for a protoplanetary disk. We have explored the kinematic structure of the gas associated with the Class 0/I protostar L1527 by using molecular lines of various species. As a result, we have discovered a drastic chemical change at the centrifugal barrier probably due to the accretion shock. Such a phenomenon has not been predicted so far in any chemical models, and its discovery provides us with a new insight into the physical and chemical processes associated with the disk formation. In this seminar, I would like to introduce our recent progress of this study and its further application to various low-mass protostellar source.
