http://arxiv.org/abs/1908.03311
We analyse ALMA observations of the SO($J_K=6_5-5_4$) emission of the circumstellar envelope of oxygen-rich AGB star R Dor, probing distances between 20 and 100 au from the star where the nascent wind is building up. We give evidence for the slow wind to host, in addition to a previously observed rotating disc, a radial outflow covering very large solid angles and displaying strong inhomogeneity both in direction and radially: the former takes the form of multiple cores and the latter displays a radial dependence suggesting an episode of enhanced mass loss having occurred a century or so ago.
P. Nhung, D. Hoai, P. Tuan-Anh, et. al.
Mon, 12 Aug 19
7/42
Comments: 13 pages, 17 figures, submitted for publication in MNRAS
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