Radial velocity confirmation of a hot super-Neptune discovered by TESS with a warm Saturn-mass companion
Artikel i vetenskaplig tidskrift, 2023

We report the discovery and confirmation of the planetary system TOI-1288. This late G dwarf harbours two planets: TOI-1288 b and TOI-1288 c. We combine TESS space-borne and ground-based transit photometry with HARPS-N and HIRES high-precision Doppler measurements, which we use to constrain the masses of both planets in the system and the radius of planet b. TOI-1288 b has a period of 2.699835(-0.000003)(+0.000004) d, a radius of 5.24 +/- 0.09 R-circle plus, and a mass of 42 +/- 3 M-circle plus, making this planet a hot transiting super-Neptune situated right in the Neptunian desert. This desert refers to a paucity of Neptune-sized planets on short period orbits. Our 2.4-yr-long Doppler monitoring of TOI-1288 revealed the presence of a Saturn-mass planet on a moderately eccentric orbit (0.13(-0.09)(+0.07)) with a minimum mass of 84 +/- 7 M-circle plus and a period of 443(-13)(+11) d. The five sectors worth of TESS data do not cover our expected mid-transit time for TOI-1288 c, and we do not detect a transit for this planet in these sectors.

techniques: radial velocities

planets and satellites: detection

techniques: photometric

Författare

E. Knudstrup

Aarhus Universitet

Nordic Optical Telescope

D. Gandolfi

Universita degli Studi di Torino

G. Nowak

Instituto de Astrofísica de Canarias

Universidad de la Laguna

Carina Persson

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

E. Furlan

California Institute of Technology (Caltech)

J. Livingston

The Graduate University for Advanced Studies (SOKENDAI)

National Astronomical Observatory of Japan

Astrobiology Center, Japan

E. Matthews

Université de Genève

M. S. Lundkvist

Aarhus Universitet

M. L. Winther

Aarhus Universitet

J. L. Rorsted

Aarhus Universitet

S. H. Albrecht

Aarhus Universitet

E. Goffo

Thüringer Landessternwarte Tautenburg

Universita degli Studi di Torino

I Carleo

Instituto de Astrofísica de Canarias

H. J. Deeg

Universidad de la Laguna

Instituto de Astrofísica de Canarias

K. A. Collins

Harvard-Smithsonian Center for Astrophysics

N. Narita

Astrobiology Center, Japan

University of Tokyo

Instituto de Astrofísica de Canarias

H. Isaacson

University of California at Berkeley

California Institute of Technology (Caltech)

S. Redfield

Wesleyan University

F. Dai

California Institute of Technology (Caltech)

T. Hirano

National Astronomical Observatory of Japan

Astrobiology Center, Japan

J. M. Akana Murphy

University of California at Santa Cruz

C. Beard

University of California at Irvine (UCI)

L. A. Buchhave

Danmarks Tekniske Universitet (DTU)

S. Cary

Wellesley College

A. Chontos

Princeton University

I Crossfield

University of Kansas

W. D. Cochran

The University of Texas at Austin

D. Conti

American Association of Variable Star Observers

P. A. Dalba

University of California at Santa Cruz

SETI Institute

M. Esposito

Thüringer Landessternwarte Tautenburg

S. Fajardo-Acosta

California Institute of Technology (Caltech)

S. Giacalone

University of California at Berkeley

S. K. Grunblatt

Johns Hopkins University

P. Guerra

Observatori Astronòmic Albanya

A. P. Hatzes

Thüringer Landessternwarte Tautenburg

R. Holcomb

University of California at Irvine (UCI)

A. W. Howard

California Institute of Technology (Caltech)

D. Huber

University of Hawaii

J. M. Jenkins

NASA Ames Research Center

P. Kabath

Czech Academy of Sciences

S. Kane

University of California at Riverside

Judith Korth

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

K. W. F. Lam

Deutsches Zentrums für Luft- und Raumfahrt (DLR)

Lester

NASA Ames Research Center

R. Matson

US Naval Observatory

K. K. McLeod

Wellesley College

J. Orell-Miquel

Universidad de la Laguna

Instituto de Astrofísica de Canarias

F. Murgas

Universidad de la Laguna

Instituto de Astrofísica de Canarias

E. Palle

Instituto de Astrofísica de Canarias

Universidad de la Laguna

A. S. Polanski

University of Kansas

G. Ricker

Massachusetts Institute of Technology (MIT)

P. Robertson

University of California at Irvine (UCI)

R. Rubenzahl

California Institute of Technology (Caltech)

J. E. Schlieder

NASA Goddard Space Flight Center

S. Seager

Massachusetts Institute of Technology (MIT)

A. M. S. Smith

Deutsches Zentrums für Luft- und Raumfahrt (DLR)

P. Tenenbaum

NASA Ames Research Center

SETI Institute

E. Turtelboom

University of California at Berkeley

R. Vanderspek

Massachusetts Institute of Technology (MIT)

L. Weiss

University of Notre Dame

J. Winn

Princeton University

Monthly Notices of the Royal Astronomical Society

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

Vol. 519 4 5637-5655

Ämneskategorier

Subatomär fysik

Astronomi, astrofysik och kosmologi

DOI

10.1093/mnras/stac3684

Mer information

Senast uppdaterat

2023-03-17