The SEEDS Direct Imaging Survey for Planets and Scattered Dust Emission in Debris Disk Systems
Abstract
Debris disks around young main-sequence stars often have gaps and cavities which for a long time have been interpreted as possibly being caused by planets. In recent years, several giant planet discoveries have been made in systems hosting disks of precisely this nature, further implying that interactions with planets could be a common cause of such disk structures. As part of the SEEDS high-contrast imaging survey, we are surveying a population of debris disk-hosting stars with gaps and cavities implied by their spectral energy distributions, in order to attempt to spatially resolve the disk as well as to detect any planets that may be responsible for the disk structure. Here we report on intermediate results from this survey. Five debris disks have been spatially resolved, and a number of faint point sources have been discovered, most of which have been tested for common proper motion, which in each case has excluded physical companionship with the target stars. From the detection limits of the 50 targets that have been observed, we find that beta Pic b-like planets (~10 Mjup planets around G--A-type stars) near the gap edges are less frequent than 15--30%, implying that if giant planets are the dominant cause of these wide (27 AU on average) gaps, they are generally less massive than beta Pic b.
Keywords
Cite
@article{arxiv.1306.0581,
title = {The SEEDS Direct Imaging Survey for Planets and Scattered Dust Emission in Debris Disk Systems},
author = {Markus Janson and Timothy D. Brandt and Amaya Moro-Martin and Tomonori Usuda and Christian Thalmann and Joseph C. Carson and Miwa Goto and Thayne Currie and M. W. McElwain and Yoichi Itoh and Misato Fukagawa and Justin Crepp and Masayuki Kuzuhara and Jun Hashimoto and Tomoyuki Kudo and Nobuhiko Kusakabe and Lyu Abe and Wolfgang Brandner and Sebastian Egner and Markus Feldt and Carol A. Grady and Olivier Guyon and Yutaka Hayano and Masahiro Hayashi and Saeko Hayashi and Thomas Henning and Klaus W. Hodapp and Miki Ishii and Masanori Iye and Ryo Kandori and Gillian R. Knapp and Jungmi Kwon and Taro Matsuo and Shoken Miyama and Jun-Ichi Morino and Tetsuro Nishimura and Tae-Soo Pyo and Eugene Serabyn and Takuya Suenaga and Hiroshi Suto and Ryuji Suzuki and Yasuhiro Takahashi and Michihiro Takami and Naruhisa Takato and Hiroshi Terada and Daego Tomono and Edwin L. Turner and Makoto Watanabe and John Wisniewski and Toru Yamada and Hideki Takami and Motohide Tamura},
journal= {arXiv preprint arXiv:1306.0581},
year = {2015}
}
Comments
17 pages, 9 figures, accepted for publication in ApJ