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 Astrofisico de Canarias

Michael Endl

The University of Texas at Austin

Sergio Velasco

University of La Laguna

Instituto Astrofisico de Canarias

Akihiko Fukui

National Astronomical Observatory of Japan

Norio Narita

National Institutes of Natural Sciences

University of Tokyo

Jorge Prieto-Arranz

Instituto Astrofisico 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 Astrofisico 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 Astrofisico de Canarias

Enric Palle

University of La Laguna

Instituto Astrofisico de Canarias

Martin Pätzold

University of Cologne

Carina Persson

Chalmers, Space, Earth and Environment, Astronomy and Plasmaphysics, Galactic Astrophysics

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 3 115

Exoplanets from space – CHEOPS and PLATO, ESA’s next two projects

Swedish National Space Board, 2017-01-01 -- 2022-12-31.

Subject Categories

Astronomy, Astrophysics and Cosmology

Roots

Basic sciences

DOI

10.3847/1538-3881/aaa841

More information

Latest update

10/12/2018