Strategic Explorations of Exoplanets and Disks with Subaru
Strategic Explorations of Exoplanets and Disks with Subaru is a multi-year survey that used the Subaru Telescope on Mauna Kea, Hawaii in an effort to directly image extrasolar planets and protoplanetary/debris disks around several hundred nearby stars. Near-infrared imaging was carried out using the AO188 Adaptive Optics System and HiCIAO high-contrast imaging instrument. The survey is headquartered at National Astronomical Observatory of Japan and led by Principal Investigator . The survey team includes over a hundred members from dozens of institutes around the world. Observations began in late October 2009, and finished in early January 2015. The goals of the survey are to address the following key issues in exoplanet∕disk science: the detection and census of exoplanets in the outer circumstellar regions around stars, the evolution of protoplanetary and debris disks including their morphological diversity, and the link between exoplanets and circumstellar disks.
Imaging discovery of the debris disk around HIP 79977
First infrared images of the inner gap in the 2MASS J16042165-2130284 transitional disk.
Direct imaging discovery of a giant inner gap in the protoplanetary disk around PDS 70
Discovery of spiral structures in the transitional disk around SAO 206462
Discovery of a stellar companion to the extrasolar planet system HAT-P-7
Near-IR scattered light detection of the spiral-armed transitional disk of the star MWC 758
Direct imaging of the UX Tau A pre-transitional disk revealing gap structures
Scattered light imaging of the MWC 80 protoplanetary disk at a historic minimum of the near-IR excess
High-contrast imaging discovery of architecture in the LkCa 15 transitional disk
Submillimeter and near-infrared observation of the transitional disk around Sz 91
First high resolution infrared images of circumstellar disk around SU Aur revealing tidal-like tails
Summary
From SEEDS, 3 direct imaging discovery of planets and boundary-mass-objects and 3 brown dwarfs detection in Pleiades. GJ 504b is a cold Jovian planet orbiting a relatively old Sun-like star and has unique atmospheric features. One young planet is also confirmed. Wide-orbit planets population can be explained as a single distribution and its frequency is ~2% from SEEDS preliminary results. Many circumstellar disks are detected down to radius r=0.1”. Fine structures such as gaps and spirals of <100 au scale are discovered for the first time, which are possible signs of planet formations. With the latest ALMA performance, these NIR scattering data will complement the submillimeter thermal emission from various disks.
