Physical and Chemical Conditions of the Protostellar Envelope and the Protoplanetary Disk in HL Tau

Chun-Ju Wu, Naomi Hirano, Shigehisa Takakuwa +2

We report our SMA observations of the Class \RN{1}-\RN{2} protostar HL Tau in the ${}^{13}$CO (2--1), C${}^{18}$O (2--1), SO(5${}_6$--4${}_5$), and the 1.3 mm dust-continuum emission and o…