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.

planets and satellites: detection

K2-135)

stars: individual (GJ 9827

Författare

P. Niraula

Wesleyan University Middletown

S. Redfield

Wesleyan University Middletown

F. Dai

Massachusetts Institute of Technology (MIT)

Princeton University

O. Barragán

Universita degli Studi di Torino

D. Gandolfi

Universita degli Studi di Torino

P.W. Cauley

Wesleyan University Middletown

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 Astrofisico 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

The University of Texas at Austin

S. Csizmadia

Deutsches Zentrums für Luft- und Raumfahrt (DLR)

G.M. Duvvuri

Wesleyan University Middletown

M. Endl

The University of Texas at Austin

Artie P. Hatzes

Thüringer Landessternwarte Tautenburg

J.H. Livingston

University of Tokyo

N. Narita

National Institutes of Natural Sciences - National Astronomical Observatory of Japan

University of Tokyo

National Institutes of Natural Sciences

D. Nespral

Universidad de la Laguna

Instituto Astrofisico de Canarias

G. Nowak

Universidad de la Laguna

Instituto Astrofisico de Canarias

M. Patzold

Universität zu Köln

E. Palle

Universidad de la Laguna

Instituto Astrofisico de Canarias

V. Van Eylen

Universiteit Leiden

Astronomical Journal

0004-6256 (ISSN) 1538-3881 (eISSN)

Vol. 154 6 266- 266

Ämneskategorier

Astronomi, astrofysik och kosmologi

Fundament

Grundläggande vetenskaper

DOI

10.3847/1538-3881/aa957c