Three Super-Earths Transiting the Nearby Star GJ 9827
Artikel i vetenskaplig tidskrift, 2017
We report on the discovery of three transiting planets around GJ 9827. The planets have radii of 1.75 ± 0.18, 1.36 ± 0.14, and 2.11_-0.21^+0.22 R⊕, and periods of 1.20896, 3.6480, and 6.2014 days, respectively. The detection was made in Campaign 12 observations as part of our K2 survey of nearby stars. GJ 9827 is a V = 10.39 mag K6V star at a distance of 30.3 ± 1.6 parsecs and the nearest star to be found hosting planets by Kepler and K2. The radial velocity follow-up, high-resolution imaging, and detection of multiple transiting objects near commensurability drastically reduce the false positive probability. The orbital periods of GJ 9827 b, c, and d planets are very close to the 1:3:5 mean motion resonance. Our preliminary analysis shows that GJ 9827 planets are excellent candidates for atmospheric observations. Besides, the planetary radii span both sides of the rocky and gaseous divide, hence the system will be an asset in expanding our understanding of the threshold.
K2-135)
planets and satellites: detection
stars: individual (GJ 9827
Författare
P. Niraula
Wesleyan University
S. Redfield
Wesleyan University
F. Dai
Princeton University
Massachusetts Institute of Technology (MIT)
O. Barragán
Universita degli Studi di Torino
D. Gandolfi
Universita degli Studi di Torino
P.W. Cauley
Wesleyan University
T. Hirano
Tokyo Institute of Technology
J. Korth
Universität zu Köln
A. M S Smith
Deutsches Zentrums für Luft- und Raumfahrt (DLR)
J. Prieto-Arranz
Instituto de Astrofísica de Canarias
Universidad de la Laguna
S. Grziwa
Universität zu Köln
Malcolm Fridlund
Astronomi och plasmafysik
Carina Persson
Astronomi och plasmafysik
A.B. Justesen
Aarhus Universitet
J.N. Winn
Princeton University
S. Albrecht
Aarhus Universitet
William D. Cochran
University of Texas
S. Csizmadia
Deutsches Zentrums für Luft- und Raumfahrt (DLR)
G.M. Duvvuri
Wesleyan University
M. Endl
University of Texas
Artie P. Hatzes
Thüringer Landessternwarte Tautenburg
J.H. Livingston
University of Tokyo
N. Narita
National Institutes of Natural Sciences
University of Tokyo
National Astronomical Observatory of Japan
D. Nespral
Universidad de la Laguna
Instituto de Astrofísica de Canarias
G. Nowak
Universidad de la Laguna
Instituto de Astrofísica de Canarias
M. Patzold
Universität zu Köln
E. Palle
Universidad de la Laguna
Instituto de Astrofísica de Canarias
V. Van Eylen
Universiteit Leiden
Astronomical Journal
0004-6256 (ISSN) 1538-3881 (eISSN)
Vol. 154 6 266- 266Exoplaneter från rymden - CHEOPS och PLATO, ESA's nästa två missioner
Rymdstyrelsen (174/18), 2017-01-01 -- 2022-12-31.
Ämneskategorier (SSIF 2011)
Astronomi, astrofysik och kosmologi
Fundament
Grundläggande vetenskaper
DOI
10.3847/1538-3881/aa957c