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^(12)CO emission from the Red Rectangle
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作者 Pham Tuan Anh Pham Ngoc Diep +4 位作者 Do Thi Hoai Pham Tuyet Nhung Nguyen Thi Phuong Nguyen Thi Thao Pierre Darriulat 《Research in Astronomy and Astrophysics》 SCIE CAS CSCD 2015年第12期2213-2228,共16页
Observations of an unprecedented quality made by ALMA on the Red Rectangle of CO(3-2) and CO(6-5) emissions are analysed jointly with the aim of obtaining as simple as possible a description of the gas morphology ... Observations of an unprecedented quality made by ALMA on the Red Rectangle of CO(3-2) and CO(6-5) emissions are analysed jointly with the aim of obtaining as simple as possible a description of the gas morphology and kinematics. Evidence is found for polar conical outflows and for a broad equatorial torus in rotation and expansion. Simple models of both are proposed. Comparing CO(6-5) and CO(3-2) emissions provides evidence for a strong temperature enhancement over the polar outflows. Continuum emission (dust) is seen to be enhanced in the equatorial region. Observed asymmetries are briefly discussed. 展开更多
关键词 stars: AGB and post-AGB -- circumstellar matter -- radio-lines: stars-- planetary nebulae: individual (Red Rectangle)
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