K2-98b: A 32 M ⊕ Neptune-Siza Planet in a 10 Day Orbit Transiting an F8 Star
Artikel i vetenskaplig tidskrift, 2016
We report the discovery of K2-98b (EPIC 211391664b), a transiting Neptune-size planet monitored by the K2 mission during its Campaign 5. We combine the K2 time-series data with ground-based photometric and spectroscopic follow-up observations to confirm the planetary nature of the object and derive its mass, radius, and orbital parameters. K2-98b is a warm Neptune-like planet in a 10 day orbit around a V = 12.2 mag F-type star with M ? = 1.074 ±0.042 M o, R ? = R o, and age of . We derive a planetary mass and radius of M p = 32.2 ±8.1 M ? and R p = R ?. K2-98b joins the relatively small group of Neptune-size planets whose mass and radius have been derived with a precision better than 25%. We estimate that the planet will be engulfed by its host star in ?3 Gyr, due to the evolution of the latter toward the red giant branch.
planets and satellites: individual K2-98b (EPIC 211391664b)
stars: fundamental parameters
planets and satellites: detection
Författare
Oscar Barragán
Universita degli Studi di Torino
Sascha Grziwa
Universität zu Köln
Davide Gandolfi
Universita degli Studi di Torino
Landessternwarte Heidelberg-Königstuhl
Malcolm Fridlund
Chalmers, Rymd- och geovetenskap, Radioastronomi och astrofysik
Michael Endl
The University of Texas at Austin
H. J. Deeg
Universidad de la Laguna
Instituto de Astrofísica de Canarias
Manuel P. Cagigal
Universidad de Cantabria
Antonino F. Lanza
Istituto nazionale di astrofisica (INAF)
Pier G Prada Moroni
Istituto Nazionale di Fisica Nucleare
Universita di Pisa
A. M S Smith
Deutsches Zentrums für Luft- und Raumfahrt (DLR)
Judith Korth
Universität zu Köln
Megan Bedell
University of Chicago
Juan Cabrera
Deutsches Zentrums für Luft- und Raumfahrt (DLR)
William D. Cochran
The University of Texas at Austin
Felice Cusano
Osservatorio Astronomico Di Bologna
Szilard Csizmadia
Deutsches Zentrums für Luft- und Raumfahrt (DLR)
Philipp Eigmüller
Deutsches Zentrums für Luft- und Raumfahrt (DLR)
Anders Erikson
Deutsches Zentrums für Luft- und Raumfahrt (DLR)
Eike W. Guenther
Thüringer Landessternwarte Tautenburg
Artie P. Hatzes
Thüringer Landessternwarte Tautenburg
David Nespral
Universidad de la Laguna
Instituto de Astrofísica de Canarias
Martin Pätzold
Universität zu Köln
Jorge Prieto-Arranz
Universidad de la Laguna
Instituto de Astrofísica de Canarias
Heike Rauer
Deutsches Zentrums für Luft- und Raumfahrt (DLR)
Technische Universität Berlin
Astronomical Journal
0004-6256 (ISSN) 1538-3881 (eISSN)
Vol. 152 6 Art. no. 193- 193Ämneskategorier
Astronomi, astrofysik och kosmologi
DOI
10.3847/0004-6256/152/6/193