Search for protoplanetary disks in binary systems

2017 Fiscal Year Final Research Report

• Project/Area Number: 24540231
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Astronomy
• Research Institution: University of Hyogo
• Principal Investigator: Itoh Yoichi 兵庫県立大学, 自然・環境科学研究所, 教授 (70332757)
• Co-Investigator(Kenkyū-buntansha): 大朝 由美子 埼玉大学, 教育学部, 准教授 (10397820)
• Project Period (FY): 2012-04-01 – 2018-03-31
• Keywords: 光学赤外線天文学 / 惑星形成 / 連星系

Outline of Final Research Achievements

We have carried out near-infrared observations of pre-main sequence binary systems associated with Taurus molecular cloud, using HiCIAO, a stellar coronagraph of the Subaru Telescope. With an adaptive optics system, we achieved spatial resolution as high as 0.1 arcsec. Polarimetric observations revealed a proto-planetary disk with a radius of 100 AU around UX Tau A. From the spatial distribution of polarization vectors, we suggest grain growth in the disk as large as 60 micron in radius, indicating accumulation of dust grains in a circumstellar disk. We also detected an extra-solar planet around main sequence binary from long term radial velocity observations with the Okayama 188cm telescope.

Free Research Field

天文学