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• W3100127858 abstract "A spectral scan of the circumstellar environment of the asymptotic giant branch (AGB) star R Doradus was taken with ALMA in cycle 2 at frequencies between 335 and 362 GHz and with a spatial resolution of ~150 milliarcseconds. Many molecular lines show a spatial offset between the blue and red shifted emission in the innermost regions of the wind. The position-velocity diagrams of this feature, in combination with previous SPHERE data and theoretical work point towards the presence of a compact differentially rotating disk, orientated nearly edge-on. We model the 28 SiO ( v = 1, J = 8 → 7) emission with a disk model. We estimate the disk mass and angular momentum to be 3 × 10 −6 M ⊙ and 5 × 10 40 m 2 kg s −1 . The latter presents an “angular momentum problem” that may be solved by assuming that the disk is the result of wind-companion interactions with a companion of at least 2.5 earth masses, located at 6 AU, the tentatively determined location of the disk’s inner rim. An isolated clump of emission is detected to the south-east with a velocity that is high compared to the previously determined terminal velocity of the wind. Its position and mean velocity suggest that it may be associated with a companion planet, located at the disk’s inner rim." @default.
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• W3100127858 date "2018-06-01" @default.
• W3100127858 modified "2023-09-23" @default.
• W3100127858 title "ALMA detection of a tentative nearly edge-on rotating disk around the nearby AGB star R Doradus" @default.
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• W3100127858 doi "https://doi.org/10.1051/0004-6361/201732246" @default.
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