文章基本信息

标题：The SEEDS High-Contrast Imaging Survey of Exoplanets Around Young Stellar Objects
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作者：Taichi Uyama ; Jun Hashimoto ; Masayuki Kuzuhara 等
期刊名称：The Astronomical journal
印刷版ISSN：0004-6256
电子版ISSN：1538-3881
出版年度：2017
卷号：153
期号：3
DOI：10.3847/1538-3881/153/3/106
语种：English
出版社：American Institute of Physics
摘要：We present high-contrast observations of 68 young stellar objects (YSOs) that have been explored as part of the Strategic Exploration of Exoplanets and Disks with Subaru (SEEDS) survey on the Subaru telescope. Our targets are very young (<10 Myr) stars, which often harbor protoplanetary disks where planets may be forming. We achieve a typical contrast of ~10−4–10−5.5 at an angular distance of 1'' from the central star, corresponding to typical mass sensitivities (assuming hot-start evolutionary models) of ~10 M J at 70 au and ~6 M J at 140 au. We detected a new stellar companion to HIP 79462 and confirmed the substellar objects GQ Lup b and ROXs 42B b. An additional six companion candidates await follow-up observations to check for common proper motion. Our SEEDS YSO observations probe the population of planets and brown dwarfs at the very youngest ages; these may be compared to the results of surveys targeting somewhat older stars. Our sample and the associated observational results will help enable detailed statistical analyses of giant planet formation.
关键词：planetary systems – planet–disk interactions – planets and satellites: formation –stars: variables: T Tauri;Herbig Ae/Be