TESS Spots a Hot Jupiter with an Inner Transiting Neptune
Artikel i vetenskaplig tidskrift, 2020

Hot Jupiters are rarely accompanied by other planets within a factor of a few in orbital distance. Previously, only two such systems have been found. Here, we report the discovery of a third system using data from the Transiting Exoplanet Survey Satellite (TESS). The host star, TOI-1130, is an eleventh magnitude K-dwarf in Gaia G-band. It has two transiting planets: a Neptune-sized planet (3.65 ± 0.10 R\oplus) with a 4.1 days period, and a hot Jupiter (1.50-0.22+0.27 RJ) with an 8.4 days period. Precise radial-velocity observations show that the mass of the hot Jupiter is 0.974-0.044+0.043 MJ. For the inner Neptune, the data provide only an upper limit on the mass of 0.17 MJ (3σ). Nevertheless, we are confident that the inner planet is real, based on follow-up ground-based photometry and adaptive-optics imaging that rule out other plausible sources of the TESS transit signal. The unusual planetary architecture of and the brightness of the host star make TOI-1130 a good test case for planet formation theories, and an attractive target for future spectroscopic observations.

Exoplanets

Hot Jupiters

Extrasolar rocky planets

Exoplanet astronomy

Extrasolar gas giants

Författare

Chelsea X. Huang

S. N. Quinn

A. Vanderburg

Juliette Becker

Joseph E. Rodriguez

Francisco J. Pozuelos

Davide Gandolfi

G. Zhou

Andrew W. Mann

Karen A. Collins

Ian Crossfield

Khalid Barkaoui

Kevin I. Collins

Malcolm Fridlund

Chalmers, Rymd-, geo- och miljövetenskap, Astronomi och plasmafysik, Galaktisk astrofysik

Michaël Gillon

Erica J. Gonzales

Maximilian N. Günther

Todd J. Henry

Steve B. Howell

Hodari-Sadiki James

Wei-Chun Jao

Emmanuel Jehin

Eric L. N. Jensen

Stephen R. Kane

Jack J. Lissauer

Elisabeth Matthews

Rachel A. Matson

Leonardo A. Paredes

Joshua E. Schlieder

K.G. Stassun

Avi Shporer

Lizhou Sha

Thiam-Guan Tan

Iskra Georgieva

Chalmers, Rymd-, geo- och miljövetenskap, Astronomi och plasmafysik, Galaktisk astrofysik

Savita Mathur

Enric Palle

Carina Persson

Chalmers, Rymd-, geo- och miljövetenskap, Astronomi och plasmafysik, Galaktisk astrofysik

Vincent Van Eylen

George Ricker

R. Vanderspek

D.W. Latham

Joshua N. Winn

S. Seager

Jon M. Jenkins

Christopher J. Burke

Robert Goeke

Stephen Rinehart

Mark E. Rose

E. B. Ting

Guillermo Torres

Ian Wong

Astrophysical Journal Letters

2041-8205 (ISSN) 2041-8213 (eISSN)

Vol. 892 7-

Exoplaneter från rymden - CHEOPS och PLATO

Rymdstyrelsen, 2017-01-01 -- 2022-12-31.

Ämneskategorier

Astronomi, astrofysik och kosmologi

Fundament

Grundläggande vetenskaper

DOI

10.3847/2041-8213/ab7302

Mer information

Skapat

2020-05-07