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NGTS-13b: a hot 4.8 Jupiter-mass planet transiting a subgiant star

Grieves, Nolan and Nielsen, Louise D and Vines, Jose I and Bryant, Edward M and Gill, Samuel and Bouchy, François and Lendl, Monika and Bayliss, Daniel and Eigmueller, Philipp and Ségransan, Damien and Acton, Jack S and Anderson, David R and Burleigh, Matthew R and Casewell, Sarah L and Chaushev, Alexander and Cooke, Benjamin F and Gillen, Edward and Goad, Michael R and Gunther, Maximilian N. and Henderson, Beth A. and Hogan, Aleisha and Jenkins, James S and Alves, Douglas R. and Jordán, Andrés and McCormac, James and Moyano, Maximiliano and Queloz, Didier and Raynard, Liam and Seidel, Julia V. and Smith, Alexis M. S. and Tilbrook, Rosanna H and Udry, Stephane and West, Richard G and Wheatley, Peter J (2021) NGTS-13b: a hot 4.8 Jupiter-mass planet transiting a subgiant star. Astronomy & Astrophysics, 647, A180. EDP Sciences. doi: 10.1051/0004-6361/202039586. ISSN 0004-6361.

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Official URL: https://www.aanda.org/articles/aa/abs/2021/03/aa39586-20/aa39586-20.html

Abstract

We report the discovery of the massive hot Jupiter NGTS-13b by the Next Generation Transit Survey (NGTS). The V = 12.7 host star is likely in the subgiant evolutionary phase with logg* = 4.04 \ensuremath± 0.05, Teff = 5819 \ensuremath± 73 K, M* = 1.30‒0.18+0.11 M\ensuremath⊙, and R* = 1.79 \ensuremath± 0.06 R\ensuremath⊙. The NGTS detected a transiting planet with a period of P = 4.12 days around the star, which was later validated with the Transiting Exoplanet Survey Satellite (TESS; TIC 454069765). We confirm the planet using radial velocities from the CORALIE spectrograph. Using NGTS and TESS full-frame image photometry combined with CORALIE radial velocities, we determine NGTS-13b to have a radius of RP = 1.142 \ensuremath± 0.046 RJup, a mass of MP = 4.84 \ensuremath± 0.44 MJup, and an eccentricity of e = 0.086 \ensuremath± 0.034. Previous studies have suggested that åisebox-0.5ex~4 MJup may be the border separating two formation scenarios (e.g., core accretion and disk instability) and that massive giant planets share similar formation mechanisms as lower-mass brown dwarfs. NGTS-13b is just above 4 MJup, making it an important addition to the statistical sample needed to understand the differences between various classes of substellar companions. The high metallicity of NGTS-13, Fe/H = 0.25 {\ensuremath{\pm}} 0.17, does not support previous suggestions that massive giants are found preferentially around lower metallicity host stars, but NGTS-13b does support findings that more massive and evolved hosts may have a higher occurrence of close-in massive planets than lower-mass unevolved stars. \textbackslash\textbackslashNGTS and TESS reduced photometry files are only available at the CDS via anonymous ftp to <A href=``http://cdsarc.u-strasbg.fr''>cdsarc.u-strasbg.fr</A> (ftp://130.79.128.5) or via <A href=``http://cdsarc.u-strasbg.fr/viz- bin/cat/J/A+A/647/A180''>http://cdsarc.u-strasbg.fr/viz- bin/cat/J/A+A/647/A180</A>

Item URL in elib:https://elib.dlr.de/142356/
Document Type:Article
Title:NGTS-13b: a hot 4.8 Jupiter-mass planet transiting a subgiant star
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Grieves, NolanObservatoire astronomique de l'Université de Genève, Chemin des maillettes 51, 1290 Sauverny, SwitzerlandUNSPECIFIED
Nielsen, Louise DObservatoire de Genève, Université de Genève, Chemin des Maillettes 51, 1290 Sauverny, SwitzerlandUNSPECIFIED
Vines, Jose IDepartamento de Astronomía, Universidad de Chile, Camino el Observatorio 1515, Las Condes, Casilla 36-D, 7591245, Santiago, ChileUNSPECIFIED
Bryant, Edward MDept. of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UKUNSPECIFIED
Gill, SamuelDepartment of Physics, University of Warwick, Coventry, UK; Centre for Exoplanets and Habitability, University of Warwick, Coventry, UKUNSPECIFIED
Bouchy, FrançoisObservatoire de Genève, Université de Genève, 51 Ch. des Maillettes, CH-1290 Sauverny, SwitzerlandUNSPECIFIED
Lendl, MonikaObservatoire Astronomique de l'Université de Genéve, Versoix, Switzerland; Space Research Institute, Austrian Academy of Sciences, Graz, AustriaUNSPECIFIED
Bayliss, DanielDepartment of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UKUNSPECIFIED
Eigmueller, PhilippPhilipp.Eigmueller (at) dlr.dehttps://orcid.org/0000-0003-4096-0594
Ségransan, DamienGeneva Observatory, University of Geneva, Chemin des Mailettes 51, 1290 Versoix, SwitzerlandUNSPECIFIED
Acton, Jack SSchool of Physics and Astronomy, University of Leicester, Leicester, LE1 7RH, UKUNSPECIFIED
Anderson, David RDept. of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UKUNSPECIFIED
Burleigh, Matthew RSchool of Physics and Astronomy, University of Leicester, University Road, Leicester LE1 7RH, UKUNSPECIFIED
Casewell, Sarah LSchool of Physics and Astronomy, University of Leicester, Leicester, LE1 7RH, UKUNSPECIFIED
Chaushev, AlexanderCenter for Astronomy and Astrophysics, TU Berlin, Hardenbergstr 36, D-10623 Berlin, GermanyUNSPECIFIED
Cooke, Benjamin FDept. of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UKUNSPECIFIED
Gillen, EdwardAstrophysics Group, Cavendish Laboratory, Cambridge, UKUNSPECIFIED
Goad, Michael RSchool of Physics and Astronomy, University of Leicester, Leicester, LE1 7RH, UKUNSPECIFIED
Gunther, Maximilian N.Centre for Exoplanets and Habitability, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UKUNSPECIFIED
Henderson, Beth A.School of Physics and Astronomy, University of Leicester, LE1 7RH, UKUNSPECIFIED
Hogan, AleishaSchool of Physics and Astronomy, University of Leicester, University Road, Leicester LE1 7RH, UKUNSPECIFIED
Jenkins, James SDepartamento de Astronomia, Universidad de Chile, Casilla 36-D, Santiago, ChileUNSPECIFIED
Alves, Douglas R.Departamento de Astronomía, Universidad de Chile, Casilla 36-D, Santiago, ChileUNSPECIFIED
Jordán, AndrésMillennium Institute for Astrophysics, Santiago, Chile; Facultad de Ingeniería y Ciencias, Universidad Adolfo Ibáñez, Peñalolén, ChileUNSPECIFIED
McCormac, JamesDept. of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UKUNSPECIFIED
Moyano, MaximilianoInstituto de Astronomía, Universidad Católica del Norte , Angamos 0610, 1270709 Antofagasta, ChileUNSPECIFIED
Queloz, DidierCambridge University, Cavendish LaboratoryUNSPECIFIED
Raynard, LiamDepartment of Physics and Astronomy, University of Leicester, University Road, Leicester LE1 7RH, UKUNSPECIFIED
Seidel, Julia V.Observatoire de Genève, Université de Genève, Chemin Pegasi 51b, 1290, Sauverny, SwitzerlandUNSPECIFIED
Smith, Alexis M. S.alexis.smith (at) dlr.deUNSPECIFIED
Tilbrook, Rosanna HSchool of Physics and Astronomy, University of Leicester, Leicester, LE1 7RH, UKUNSPECIFIED
Udry, StephaneObservatoire Astronomique de l'Université de Genève, 51 Ch. des Maillettes, CH-1290 Versoix, SwitzerlandUNSPECIFIED
West, Richard GDept. of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UKUNSPECIFIED
Wheatley, Peter JDept. of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UKUNSPECIFIED
Date:2021
Journal or Publication Title:Astronomy & Astrophysics
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:647
DOI :10.1051/0004-6361/202039586
Page Range:A180
Publisher:EDP Sciences
ISSN:0004-6361
Status:Published
Keywords:planets and satellites: detection, planets and satellites: individual: NGTS-13b, techniques: photometric, techniques: radial velocities, Astrophysics - Earth and Planetary Astrophysics
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Space Exploration
DLR - Research theme (Project):R - Project PLATO - PMC and Science
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Extrasolar Planets and Atmospheres
Deposited By: Eigmüller, Dr. Philipp
Deposited On:21 May 2021 07:24
Last Modified:21 May 2021 07:24

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