K2-99: A subgiant hosting a transiting warm Jupiter in an eccentric orbit and a long-period companion
Artikel i vetenskaplig tidskrift, 2016

We report the discovery from K2 of a transiting planet in an 18.25-d, eccentric (0.19 ± 0.04) orbit around K2-99, an 11th magnitude subgiant in Virgo. We con- firm the planetary nature of the companion with radial velocities, and determine that the star is a metal-rich ([Fe/H] = 0.20 ± 0.05) subgiant, with mass 1.60+0.14 -0.10 M⊙ and radius 3.1 ± 0.1 R⊙. The planet has a mass of 0.97 ± 0.09 MJup and a radius 1.29 ± 0.05 RJup. A measured systemic radial acceleration of -2.12 ± 0.04 m s-1d-1 offers compelling evidence for the existence of a third body in the system, perhaps a brown dwarf orbiting with a period of several hundred days.

Planetary systems

Planets and satellites: individual: K2-99

Planets and satellites: detection

Författare

A. M S Smith

Deutsches Zentrum fur Luft- Und Raumfahrt

D. Gandolfi

Landessternwarte Heidelberg

Universita degli Studi di Torino

O. Barragán

Universita degli Studi di Torino

B. Bowler

The University of Texas at Austin

S. Csizmadia

Deutsches Zentrum fur Luft- Und Raumfahrt

M. Endl

The University of Texas at Austin

Malcolm Fridlund

Chalmers, Rymd- och geovetenskap, Radioastronomi och astrofysik

S. Grziwa

Universität zu Köln

E. W. Guenther

Thüringer Landessternwarte Tautenburg

A. Hatzes

Thüringer Landessternwarte Tautenburg

G. Nowak

Instituto Astrofisico de Canarias

Universidad de la Laguna

S. Albrecht

Aarhus Universitet

R. Alonso

Universidad de la Laguna

Instituto Astrofisico de Canarias

J. Cabrera

Deutsches Zentrum fur Luft- Und Raumfahrt

W. D. Cochran

The University of Texas at Austin

H. J. Deeg

Universidad de la Laguna

Instituto Astrofisico de Canarias

F. Cusano

Osservatorio Astronomico Di Bologna

Ph Eigmüller

Deutsches Zentrum fur Luft- Und Raumfahrt

A. Erikson

Deutsches Zentrum fur Luft- Und Raumfahrt

D. Hidalgo

Instituto Astrofisico de Canarias

Universidad de la Laguna

T. Hirano

Tokyo Institute of Technology

M. C. Johnson

Ohio State University

The University of Texas at Austin

J. Korth

Universität zu Köln

A. Mann

The University of Texas at Austin

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

E. Palle

Universidad de la Laguna

Instituto Astrofisico de Canarias

M. Patzold

Universität zu Köln

J. Prieto-Arranz

Universidad de la Laguna

Instituto Astrofisico de Canarias

H. Rauer

Technische Universität Berlin

Deutsches Zentrum fur Luft- Und Raumfahrt

I. Ribas

CSIC - Instituto de Ciencias del Espacio (ICE)

B. Tingley

Aarhus Universitet

V. Wolthoff

Landessternwarte Heidelberg

Monthly Notices of the Royal Astronomical Society

0035-8711 (ISSN) 1365-2966 (eISSN)

Vol. 464 1-10

Ämneskategorier

Astronomi, astrofysik och kosmologi