K2-295 b and K2-237 b: Two Transiting Hot Jupiters
Journal article, 2019
We report the discovery from K2 of two transiting hot Jupiter systems. K2-295 (observed in Campaign 8) is a K5 dwarf which hosts a planet slightly smaller than Jupiter, orbiting with a period of 4.0 d. We have made an independent discovery of K2-237 b (Campaign 11), which orbits an F9 dwarf every 2.2 d and has an inflated radius 60–70% larger than that of Jupiter. We use high-precision radial velocity measurements, obtained using the HARPS and FIES spectrographs, to measure the planetary masses. We find that K2-295 b has a similar mass to Saturn, while K2-237 b is a little more massive than Jupiter.
K2-237
Planetary systems – Planets and satellites: detection – Planets and satellites: individ- ual: K2-295
Author
A.M.S. Smith
German Aerospace Center (DLR)
Sz. Csizmadia
German Aerospace Center (DLR)
D. Gandolfi
University of Turin
S. Albrecht
Aarhus University
R. Alonso
University of La Laguna
IAC
O. Barragán
University of Turin
J. Cabrera
German Aerospace Center (DLR)
W. D. Cochran
The University of Texas at Austin
F. Dai
Massachusetts Institute of Technology (MIT)
H. Deeg
IAC
University of La Laguna
Ph. Eigmüller
Technische Universität Berlin
German Aerospace Center (DLR)
M. Endl
The University of Texas at Austin
A. Erikson
German Aerospace Center (DLR)
Malcolm Fridlund
Chalmers, Space, Earth and Environment, Astronomy and Plasmaphysics, Galactic Astrophysics
A. Fukui
National Institutes of Natural Sciences
IAC
S. Grziwa
University of Cologne
E. W. Guenther
Thüringer Landessternwarte Tautenburg
A. P. Hatzes
Thüringer Landessternwarte Tautenburg
D. Hidalgo
University of La Laguna
IAC
T. Hirano
Tokyo Institute of Technology
J. Korth
University of Cologne
M. Kuzuhara
National Institutes of Natural Sciences
J. Livingston
University of Tokyo
N. Narita
National Institutes of Natural Sciences
IAC
University of Tokyo
D. Nespral
IAC
University of La Laguna
P. Niraula
Wesleyan University
G. Nowak
University of La Laguna
IAC
E. Palle
IAC
University of La Laguna
M. Pätzold
University of Cologne
Carina Persson
Chalmers, Space, Earth and Environment, Astronomy and Plasmaphysics, Galactic Astrophysics
J. Prieto-Arranz
IAC
University of La Laguna
H. Rauer
Freie Universität Berlin
German Aerospace Center (DLR)
Technische Universität Berlin
S. Redfield
Wesleyan University
I Ribas
Institute of Space Studies of Catalonia (IEEC)
Institute of Space Sciences (ICE) - CSIC
V. Van Eylen
Leiden University
Acta Astronomica
0001-5237 (ISSN)
Vol. 69 135-158Exoplanets 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
10.32023/0001-5237/69.2.3