Three Small Planets Transiting a Hyades Star
Journal article, 2018
We present the discovery of three small planets transiting K2-136 (LP 358 348, EPIC 247589423), a late K dwarf in the Hyades. The planets have orbital periods of 7.9757 ± 0.0011, 17.30681-0.00036+0.00034, and 25.5715-0.0040+0.0038 days, and radii of 1.05 ± 0.16, 3.14 ± 0.36, and 1.55-0.21+0.24 Rearth , respectively. With an age of 600–800 Myr, these planets are some of the smallest and youngest transiting planets known. Due to the relatively bright (J = 9.1) host star, the planets are compelling targets for future characterization via radial velocity mass measurements and transmission spectroscopy. As the first known star with multiple transiting planets in a cluster, the system should be helpful for testing theories of planet formation and migration.
planets and satellites: detection
stars: individual: LP 358-348
planetary systems
techniques: photometric
techniques: spectroscopic
Author
John H. Livingston
University of Tokyo
Fei Dai
Princeton University
Massachusetts Institute of Technology (MIT)
Teruyuki Hirano
Tokyo Institute of Technology
Davide Gandolfi
University of Turin
Grzegorz Nowak
University of La Laguna
Instituto de Astrofísica de Canarias
Michael Endl
The University of Texas at Austin
Sergio Velasco
University of La Laguna
Instituto de Astrofísica de Canarias
Akihiko Fukui
National Astronomical Observatory of Japan
Norio Narita
National Institutes of Natural Sciences
University of Tokyo
Jorge Prieto-Arranz
Instituto de Astrofísica de Canarias
University of La Laguna
Oscar Barragán
University of Turin
Felice Cusano
Istituto nazionale di astrofisica (INAF)
Simon Albrecht
Aarhus University
Juan Cabrera
German Aerospace Center (DLR)
William D. Cochran
The University of Texas at Austin
Szilard Csizmadia
German Aerospace Center (DLR)
Hans J. Deeg
University of La Laguna
Instituto de Astrofísica de Canarias
Philipp Eigmüller
German Aerospace Center (DLR)
Anders Erikson
German Aerospace Center (DLR)
Malcolm Fridlund
Chalmers, Space, Earth and Environment, Astronomy and Plasmaphysics
Leiden University
Sascha Grziwa
University of Cologne
Eike W. Guenther
Thüringer Landessternwarte Tautenburg
Artie P. Hatzes
Thüringer Landessternwarte Tautenburg
Kiyoe Kawauchi
Tokyo Institute of Technology
Judith Korth
University of Cologne
David Nespral
University of La Laguna
Instituto de Astrofísica de Canarias
Enric Palle
University of La Laguna
Instituto de Astrofísica de Canarias
Martin Pätzold
University of Cologne
Carina Persson
Chalmers, Space, Earth and Environment, Astronomy and Plasmaphysics
Heike Rauer
German Aerospace Center (DLR)
Technische Universität Berlin
A. M. S. Smith
German Aerospace Center (DLR)
Motohide Tamura
University of Tokyo
National Institutes of Natural Sciences
Yasuhiro Tanaka
University of Tokyo
Vincent Van Eylen
Leiden University
Noriharu Watanabe
The Graduate University for Advanced Studies (SOKENDAI)
National Astronomical Observatory of Japan
Joshua N. Winn
Princeton University
Astronomical Journal
0004-6256 (ISSN) 1538-3881 (eISSN)
Vol. 155 3 115Exoplanets from space – CHEOPS and PLATO, ESA’s next two projects
Swedish National Space Board (174/18), 2017-01-01 -- 2022-12-31.
Subject Categories
Astronomy, Astrophysics and Cosmology
Roots
Basic sciences
DOI
10.3847/1538-3881/aaa841