The moving group targets of the seeds high-contrast imaging survey of exoplanets and disks: Results and observations from the first three years

Timothy D. Brandt, Masayuki Kuzuhara, Michael W. McElwain, Joshua E. Schlieder, John P. Wisniewski, Edwin L. Turner, J. Carson, T. Matsuo, B. Biller, M. Bonnefoy, C. Dressing, M. Janson, G. R. Knapp, A. Moro-Martín, C. Thalmann, T. Kudo, N. Kusakabe, J. Hashimoto, L. Abe, W. BrandnerT. Currie, S. Egner, M. Feldt, T. Golota, M. Goto, C. A. Grady, O. Guyon, Y. Hayano, M. Hayashi, S. Hayashi, T. Henning, K. W. Hodapp, M. Ishii, M. Iye, R. Kandori, J. Kwon, K. Mede, S. Miyama, J. I. Morino, T. Nishimura, T. S. Pyo, E. Serabyn, T. Suenaga, H. Suto, R. Suzuki, M. Takami, Y. Takahashi, N. Takato, H. Terada, D. Tomono, M. Watanabe, T. Yamada, H. Takami, T. Usuda, M. Tamura

研究成果: Article査読

68 被引用数 (Scopus)

抄録

We present results from the first three years of observations of moving group (MG) targets in the Strategic Exploration of Exoplanets and Disks with Subaru (SEEDS) high-contrast imaging survey of exoplanets and disks using the Subaru telescope. We achieve typical contrasts of 105 at 1″ and 106 beyond 2″ around 63 proposed members of nearby kinematic MGs. We review each of the kinematic associations to which our targets belong, concluding that five, β Pictoris (20 Myr), AB Doradus (100 Myr), Columba (30 Myr), Tucana-Horogium (30 Myr), and TW Hydrae (10 Myr), are sufficiently well-defined to constrain the ages of individual targets. Somewhat less than half of our targets are high-probability members of one of these MGs. For all of our targets, we combine proposed MG membership with other age indicators where available, including Ca II HK emission, X-ray activity, and rotation period, to produce a posterior probability distribution of age. SEEDS observations discovered a substellar companion to one of our targets, κ And, a late B star. We do not detect any other substellar companions, but do find seven new close binary systems, of which one still needs to be confirmed. A detailed analysis of the statistics of this sample, and of the companion mass constraints given our age probability distributions and exoplanet cooling models, will be presented in a forthcoming paper.

本文言語English
論文番号1
ジャーナルAstrophysical Journal
786
1
DOI
出版ステータスPublished - 2014 5月 1

ASJC Scopus subject areas

  • 天文学と天体物理学
  • 宇宙惑星科学

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