Three Small Planets Transiting a Hyades Star
Artikel i vetenskaplig tidskrift, 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
Författare
John H. Livingston
University of Tokyo
Fei Dai
Princeton University
Massachusetts Institute of Technology (MIT)
Teruyuki Hirano
Tokyo Institute of Technology
Davide Gandolfi
Universita degli Studi di Torino
Grzegorz Nowak
Universidad de la Laguna
Instituto de Astrofísica de Canarias
Michael Endl
The University of Texas at Austin
Sergio Velasco
Universidad de 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
Universidad de la Laguna
Oscar Barragán
Universita degli Studi di Torino
Felice Cusano
Istituto nazionale di astrofisica (INAF)
Simon Albrecht
Aarhus Universitet
Juan Cabrera
Deutsches Zentrums für Luft- und Raumfahrt (DLR)
William D. Cochran
The University of Texas at Austin
Szilard Csizmadia
Deutsches Zentrums für Luft- und Raumfahrt (DLR)
Hans J. Deeg
Universidad de la Laguna
Instituto de Astrofísica de Canarias
Philipp Eigmüller
Deutsches Zentrums für Luft- und Raumfahrt (DLR)
Anders Erikson
Deutsches Zentrums für Luft- und Raumfahrt (DLR)
Malcolm Fridlund
Chalmers, Rymd-, geo- och miljövetenskap, Astronomi och plasmafysik
Universiteit Leiden
Sascha Grziwa
Universität zu Köln
Eike W. Guenther
Thüringer Landessternwarte Tautenburg
Artie P. Hatzes
Thüringer Landessternwarte Tautenburg
Kiyoe Kawauchi
Tokyo Institute of Technology
Judith Korth
Universität zu Köln
David Nespral
Universidad de la Laguna
Instituto de Astrofísica de Canarias
Enric Palle
Universidad de la Laguna
Instituto de Astrofísica de Canarias
Martin Pätzold
Universität zu Köln
Carina Persson
Chalmers, Rymd-, geo- och miljövetenskap, Astronomi och plasmafysik
Heike Rauer
Deutsches Zentrums für Luft- und Raumfahrt (DLR)
Technische Universität Berlin
A. M. S. Smith
Deutsches Zentrums für Luft- und Raumfahrt (DLR)
Motohide Tamura
University of Tokyo
National Institutes of Natural Sciences
Yasuhiro Tanaka
University of Tokyo
Vincent Van Eylen
Universiteit Leiden
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 115Exoplaneter från rymden - CHEOPS och PLATO, ESA's nästa två missioner
Rymdstyrelsen (174/18), 2017-01-01 -- 2022-12-31.
Ämneskategorier
Astronomi, astrofysik och kosmologi
Fundament
Grundläggande vetenskaper
DOI
10.3847/1538-3881/aaa841