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: detection

planets and satellites: individual K2-98b (EPIC 211391664b)

stars: fundamental parameters

Författare

Oscar Barragán

Universita degli Studi di Torino

Sascha Grziwa

Universität zu Köln

Davide Gandolfi

Landessternwarte Heidelberg

Universita degli Studi di Torino

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 Astrofisico de Canarias

Manuel P. Cagigal

Universidad de Cantabria

Antonino F. Lanza

Osservatorio Astrofisico di Catania

Pier G Prada Moroni

Universita di Pisa

Istituto Nazionale Di Fisica Nucleare, Frascati

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

Instituto Astrofisico de Canarias

Universidad de la Laguna

Martin Pätzold

Universität zu Köln

Jorge Prieto-Arranz

Universidad de la Laguna

Instituto Astrofisico 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- 193

Ämneskategorier

Astronomi, astrofysik och kosmologi

DOI

10.3847/0004-6256/152/6/193