1 Introduction The circumstellar envelope has a complex structure. Therefore, much present work is on the envelope of Mira variable, and especially on its structure. Some distribution maps of character velocity region...1 Introduction The circumstellar envelope has a complex structure. Therefore, much present work is on the envelope of Mira variable, and especially on its structure. Some distribution maps of character velocity region of M-type supergiants can be obtained from observation of VLBI. We have proposed and adopted a new idea and method,展开更多
文摘1 Introduction The circumstellar envelope has a complex structure. Therefore, much present work is on the envelope of Mira variable, and especially on its structure. Some distribution maps of character velocity region of M-type supergiants can be obtained from observation of VLBI. We have proposed and adopted a new idea and method,
