Three Small Planets Transiting a Hyades Star
Journal
Date Issued
2018
Author(s)
Livingston, John H.
•
Dai, Fei
•
Hirano, Teruyuki
•
Gandolfi, Davide
•
Nowak, Grzegorz
•
Endl, Michael
•
Velasco, Sergio
•
Fukui, Akihiko
•
Narita, Norio
•
Prieto-Arranz, Jorge
•
Barragan, Oscar
•
•
Albrecht, Simon
•
Cabrera, Juan
•
Cochran, William D.
•
Csizmadia, Szilard
•
Deeg, Hans J.
•
Eigmüller, Philipp
•
Erikson, Anders
•
Fridlund, Malcolm
•
Grziwa, Sascha
•
Guenther, Eike W.
•
Hatzes, Artie P.
•
Kawauchi, Kiyoe
•
Korth, Judith
•
Nespral, David
•
Palle, Enric
•
Pätzold, Martin
•
Persson, Carina M.
•
Rauer, Heike
•
Smith, Alexis M. S.
•
Tamura, Motohide
•
Tanaka, Yusuke
•
Van Eylen, Vincent
•
Watanabe, Noriharu
•
Winn, Joshua N.
Abstract
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 {R}\oplus , 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.
Volume
155
Issue
3
Start page
115
Issn Identifier
0004-6256
Ads BibCode
2018AJ....155..115L
Rights
open.access
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