JpGU-AGU Joint Meeting 2020

Presentation information

[J] Poster

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

[P-CG26] New Developments of Planetary Sciences with ALMA

convener:Tetsuo Hasegawa(National Astronomical Observatory of Japan, National Institutes of Natural Sciences), Takayuki Muto(Division of Liberal Arts, Kogakuin University), Takahiro IINO(Information Technology Center, the University of Tokyo), Masumi Shimojo(National Astronomical Observatory of Japan)

[PCG26-P05] ALMA High Resolution Observations of GW Ori

Jiaqing Bi2, Ruobing Dong2, *Takayuki Muto1 (1.Division of Liberal Arts, Kogakuin University, 2.University of Victoria)

Keywords:protoplanetary disks, ALMA, sub-mm observations, disk dynamics

We report the results of high spatial resolution observations of GW Ori. This is a hierarchical triple system at a distance of ~402 pc. Two of the stars (2.7 Msun and 1.7 Msun) compose a spectroscopic binary with a separation of ~1 AU. A tertiary component (0.9 Msun) was detected by near-infrared interferometry at a projected distance of ~8 AU. The system harbours a circumtriple protoplanetary disk with dust extending to ~400 AU and with gas extending to ~1300 AU. We observe the disk with dust continuum emission and with CO isotope lines. We discover three dust rings in the disk, which have different inclinations and centers. Both dust and gas emission strongly indicate that the disk has misaligned parts, and the dust emission suggests that the innermost dust ring is eccentric. We interpret these as evidence of ongoing dynamical interactions between the triple stars and the circumtriple disk. This presentation is based on the submitted paper by Bi, van der Marel, Dong, Muto, Martin, Smallwood, Hashimoto, Liu, Nomura, Hasegawa, Takami, Konishi, Momose, Kanagawa, Kataoka, Ono, Sitko, Takahashi, Tomida and Tsukagoshi.