Rings of C2H in the Molecular Disks Orbiting TW Hya and V4046 Sgr. Issue Volume 10:Issue S314(2015) (November 2015)

• Record Type: Journal Article
• Authors: Kastner, J. H.; Qi, C.; Gorti, U.; Hily-Blant, P.; Oberg, K.; Forveille, T.; Andrews, S.; Wilner, D.
• Editors: Kastner, J. H.; Stelzer, B.; Metchev, S. A.
• Is Part Of: Proceedings of the International Astronomical Union. Volume 10:Issue S314(2015)
• Page Start: 193
• Page End: 194
• Publication Date: 2015-11
• Subjects: protoplanetary disks, -- stars: individual (TW Hya, V4046 Sgr), -- stars: pre-main sequence; Astronomy -- Congresses; Astronomy -- Periodicals; 520
• DOI: 10.1017/S1743921315005979
• Languages: English
• ISSNs: 1743-9213

Abstract

Abstract: We have used the Submillimeter Array (SMA) to image, at ~1″ resolution, C2 H(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 C2 H emission exhibits a ring-like morphology within each disk; the radius of the inner hole of the C2 H 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 C2 H emission likely traces irradiation of the tenuous surface layers of the outer disks by high-energy photons from the central stars.