arxiv: 1510.00739 · v1 · pith:RURZVZQUnew · submitted 2015-10-02 · 🌌 astro-ph.SR

Rings of C2H in the Molecular Disks Orbiting TW Hya and V4046 Sgr

J. H. Kastner (1) , C. Qi (2) , U. Gorti (3 , 4) , P. Hily-Blant (5 , 6) , K. Oberg (2) , T. Forveille (6)

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S. Andrews (2) D. Wilner (2) ((1) Rochester Institute of Technology (2) Harvard-Smithsonian Center for Astrophysics (3) SETI Institute (4) NASA Ames Research Center (5) Universite Grenoble Alpes (6) Institut de Planetologie et d'Astrophysique de Grenoble)

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keywords diskdisksemissionv4046orbitingarraycasecentral

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We have used the Submillimeter Array to image, at ~1" resolution, C2H(3-2) emission from the molecule-rich circumstellar disks orbiting the nearby, classical T Tauri star systems TW Hya and V4046 Sgr. The SMA imaging reveals that the C2H emission exhibits a ring-like morphology within each disk, the inner hole radius of the C2H ring within the V4046 Sgr disk (~70 AU) is somewhat larger than than of its counterpart within the TW Hya disk (~45 AU). We suggest that, in each case, the C2H emission likely traces irradiation of the tenuous surface layers of the outer disks by high-energy photons from the central stars.

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Rings of C2H in the Molecular Disks Orbiting TW Hya and V4046 Sgr

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