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理論天文物理理論天文物理 (Theory)

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Kinetic signatures in disks produced by multi-Jupiter-mass planets

圖片來源: Dong, Liu, & Fung

Moment-2 image for the 13C18O J = 3–2 transition of the fiducial model at face on. The location of the circumplanetary disk is labeled. A 4×10-3 stellar mass planet induces a prominent ring of high velocity dispersion inside the gap. This is the key planet-induced signature in this study (Dong, Liu, & Fung 2019).

Dong, Liu, & Fung, (2019) investigated the kinematic signatures in disks produced by multi-Jupiter-mass planets using 3D hydrodynamics and radiative transfer simulations. Such a planet opens a deep gap, and drives transonic vertical motions inside. Such motions include both a bulk motion of the entire half-disk column, and turbulence on scales comparable to and smaller than the scale height. We demonstrated that such motions significantly broaden molecular lines from the gap, producing double-peaked line profiles at certain locations, and a kinematic velocity dispersion comparable to thermal after azimuthal averaging.