Japan Geoscience Union Meeting 2019

Presentation information

[J] Poster

P (Space and Planetary Sciences ) » P-CG Complex & General

[P-CG24] New Developments of Planetary Sciences with ALMA

Wed. May 29, 2019 5:15 PM - 6:30 PM Poster Hall (International Exhibition Hall8, Makuhari Messe)

convener:Takayuki Muto(Division of Liberal Arts, Kogakuin University), Munetake Momose(The College of Science, Ibaraki University), Hideo Sagawa(Faculty of Science, Kyoto Sangyo University), Masumi Shimojo(National Astronomical Observatory of Japan)

[PCG24-P05] Possible inclined inner protoplanetary disk

*Jun Hashimoto1, Mihoko Konishi1, Taichi Uyama2, Christian Ginski3, Matthias Samland4 (1.AstroBiology Center, National Institutes of Natural Sciences, 2.University of Tokyo, 3.University of Amsterdam, 4.Max Planck Institute for Astronomy)

Keywords:protoplanetary disk

A young embedded planet in the protoplanetary disk is expected to interact with a parent disk. When the planet is inclined and massive enough (> 1 Jupiter mass), the disk-planet interaction theory predicts the disk inside the planetary orbit breaks from the outer disk. Such a misaligned inner disk can both warp gas velocity structures observed by ALMA and cast the shadows in the outer disk in the near-infrared image. By analyzing the position of the shadows in the outer disk, one can estimate the inclination of the inner disk relative to the outer disk. Furthermore such systems with shadows should be promising targets for searching young inclined planets in the disks, and would help understanding of planetary orbital evolution.

As a part of our survey in archival data obtained with VLT/SPHERE which is the high contrast instrument in near-infrared, we reduced LkHa 330. LkHa 330 is a T Tauri star with a mass of 2.2 solar mass and known to possess gap and spiral structures. By reducing VLT/SPHERE archival data at H band (1.6 micron), we found shadow structures at PA of 85 and 280 degree in the outer disk at 38 AU in radius. We also found a possible bright blob at PA of 160 degree with a separation of 23 AU from the central star. In the poster, we discuss the inclination of the inner disk by comparing our Monte Carlo radiative transfer calculations for the inclined disks and mention future ALMA proposal plan.