Probing the mass loss history of the yellow hypergiant IRC + 10420
نویسندگان
چکیده
We have used the sub-millimeter array to image the molecular envelope around IRC+10420. Our observations reveal a large and clumpy expanding envelope around the star. The molecular envelope shows a clear asymmetry in CO J=2–1 emission in the South-West direction. The elongation of the envelope is found even more pronounced in the emission of CO J=2–1 and SO JK=65–54. A small positional velocity gradient across velocity channels is seen in these lines, on leave from Center for Quantum Electronics, Institute of Physics, Vietnamese Academy of Science and Technology, 10 DaoTan, ThuLe, BaDinh, Hanoi, Vietnam
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