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- W2024476742 abstract "We present a radial velocity study of the RY Tau jet–disk system, designed to determine whether a transfer of angular momentum from disk to jet can be observed. Many recent studies report on the rotation of T Tauri disks and on what may be a signature of T Tauri jet rotation. However, due to observational difficulties, few studies report on both disk and jet within the same system to establish if the senses of rotation match and hence can be interpreted as a transfer of angular momentum. We report a clear signature of Keplerian rotation in the RY Tau disk, based on Plateau de Bure observations. We also report on the transverse radial velocity profile of the RY Tau jet close to the star. We identify two distinct profile shapes: a v-shape, which appears near jet shock positions, and a flat profile, which appears between shocks. We do not detect a rotation signature above 3σ uncertainty in any of our transverse cuts of the jet. Nevertheless, if the jet is currently in steady-state, the errors themselves provide a valuable upper limit on the jet toroidal velocity of 10 km s−1, implying a launch radius of ≤0.45 AU. However, possible contamination of jet kinematics, via shocks or precession, prevents any firm constraint on the jet launch point, since most of its angular momentum could be stored in magnetic form rather than in rotation of matter." @default.
- W2024476742 created "2016-06-24" @default.
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- W2024476742 date "2015-04-23" @default.
- W2024476742 modified "2023-09-23" @default.
- W2024476742 title "A SEARCH FOR CONSISTENT JET AND DISK ROTATION SIGNATURES IN RY TAU" @default.
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- W2024476742 doi "https://doi.org/10.1088/0004-637x/804/1/2" @default.
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