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NGTS-19b: a high-mass transiting brown dwarf in a 17-d eccentric orbit

Acton, Jack S. and Goad, Michael R. and Burleigh, Matthew R. and Casewell, Sarah L. and Breytenbach, Hannes and Nielsen, Louise D. and Smith, Gareth and Anderson, David R. and Battley, Matthew P. and Bayliss, Daniel and Bouchy, Fran\cois and Bryant, Edward M. and Csizmadia, Szilard and Eigmüller, Philipp and Gill, Samuel and Gillen, Edward and Grieves, Nolan and Günther, Maximilian N. and Henderson, Beth A. and Hodgkin, Simon T. and Jackman, James A.~G. and Jenkins, James S and Lendl, Monika and McCormac, James and Moyano, Maximiliano and Nelson, Richard P. and Sefako, Ramotholo R. and Smith, Alexis M.~S. and Stalport, Manu and Thomas, Jessymol K. and Tilbrook, Rosanna H. and Udry, Stephane and West, Richard G and Wheatley, Peter J and Worters, Hannah L. and Vines, Jose I. and Alves, Douglas R. (2021) NGTS-19b: a high-mass transiting brown dwarf in a 17-d eccentric orbit. Monthly Notices of the Royal Astronomical Society, 505 (2), pp. 2741-2752. Oxford University Press. doi: 10.1093/mnras/stab1459. ISSN 0035-8711.

Full text not available from this repository.

Official URL: https://academic.oup.com/mnras/article/505/2/2741/6280962

Abstract

We present the discovery of NGTS-19b, a high-mass transiting brown dwarf discovered by the Next Generation Transit Survey. We investigate the system using follow-up photometry from the South African Astronomical Observatory, as well as sector 11 Transiting Exoplanet Survey Satellite data, in combination with radial velocity measurements from the CORALIE spectrograph to precisely characterize the system. We find that NGTS-19b is a brown dwarf companion to a K-star, with a mass of 69.5+5.7−5.4 MJup and radius of 1.034+0.055−0.053RJup. The system has a reasonably long period of 17.84 d, and a high degree of eccentricity of 0.3767+0.0061−0.0061. The mass and radius of the brown dwarf imply an age of 0.46+0.26−0.15 Gyr, however, this is inconsistent with the age determined from the host star spectral energy distribution, suggesting that the brown dwarf may be inflated. This is unusual given that its large mass and relatively low levels of irradiation would make it much harder to inflate. NGTS-19b adds to the small, but growing number of brown dwarfs transiting main-sequence stars, and is a valuable addition as we begin to populate the so-called brown dwarf desert.

Item URL in elib:https://elib.dlr.de/144901/
Document Type:Article
Title:NGTS-19b: a high-mass transiting brown dwarf in a 17-d eccentric orbit
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Acton, Jack S.School of Physics and Astronomy, University of Leicester, University Road, Leicester LE1 7RH, UKUNSPECIFIED
Goad, Michael R.School of Physics and Astronomy, University of Leicester, University Road, Leicester LE1 7RH, UKUNSPECIFIED
Burleigh, Matthew R.School of Physics and Astronomy, University of Leicester, Leicester LE1 7RH, UKUNSPECIFIED
Casewell, Sarah L.School of Physics and Astronomy, University of Leicester, University Road, Leicester LE1 7RH, UKUNSPECIFIED
Breytenbach, HannesSouth African Astronomical Observatory, PO Box 9, Observatory 7935, Cape Town, South Africa; Department of Astronomy, University of Cape Town, Rondebosch 7700, Cape Town, South AfricaUNSPECIFIED
Nielsen, Louise D.Observatoire de Genève, Université de Genève, 51 Ch. des Maillettes, CH-1290 Sauverny, SwitzerlandUNSPECIFIED
Smith, GarethAstrophysics Group, Cavendish Laboratory, J.J. Thomson Avenue, Cambridge CB3 0HE, UKUNSPECIFIED
Anderson, David R.Centre for Exoplanets and Habitability, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK; Department of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UKUNSPECIFIED
Battley, Matthew P.Centre for Exoplanets and Habitability, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK; Department of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UKUNSPECIFIED
Bayliss, DanielCentre for Exoplanets and Habitability, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK; Department of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UKUNSPECIFIED
Bouchy, Fran\coisObservatoire de Genève, Université de Genève, 51 Ch. des Maillettes, CH-1290 Sauverny, SwitzerlandUNSPECIFIED
Bryant, Edward M.Centre for Exoplanets and Habitability, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK; Department of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UKUNSPECIFIED
Csizmadia, Szilardszilard.csizmadia (at) dlr.deUNSPECIFIED
Eigmüller, PhilippPhilipp.Eigmueller (at) dlr.dehttps://orcid.org/0000-0003-4096-0594
Gill, SamuelDepartment of Physics, University of Warwick, Coventry, UK; Centre for Exoplanets and Habitability, University of Warwick, Coventry, UKUNSPECIFIED
Gillen, EdwardAstrophysics Group, Cavendish Laboratory , J.J. Thomson Avenue, Cambridge CB3 0HE, UKUNSPECIFIED
Grieves, NolanObservatoire astronomique de l'Université de Genève, Chemin des maillettes 51, 1290 Sauverny, SwitzerlandUNSPECIFIED
Günther, Maximilian N.Juan Carlos Torres Fellow.; Department of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, 70 Vassar Street, Cambridge, MA 02139, USAUNSPECIFIED
Henderson, Beth A.School of Physics and Astronomy, University of Leicester, LE1 7RH, UKUNSPECIFIED
Hodgkin, Simon T.Institute of Astronomy, University of Cambridge, Madingley Rise, Cambridge CB3 0HA, UKUNSPECIFIED
Jackman, James A.~G.Department of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK; Centre for Exoplanets and Habitability, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UKUNSPECIFIED
Jenkins, James SDepartamento de Astronomía, Universidad de Chile, Camino el Observatorio 1515, Las Condes, Casilla 36-D, 7591245, Santiago, ChileUNSPECIFIED
Lendl, MonikaObservatoire Astronomique de l'Université de Genéve, Versoix, Switzerland; Space Research Institute, Austrian Academy of Sciences, Graz, AustriaUNSPECIFIED
McCormac, JamesDepartment of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK; Centre for Exoplanets and Habitability, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UKUNSPECIFIED
Moyano, MaximilianoInstituto de Astronomía, Universidad Católica del Norte, Angamos 0610, 1270709 Antofagasta, ChileUNSPECIFIED
Nelson, Richard P.Astronomy Unit, Queen Mary University of London, Mile End Road, London E1 4NS, UKUNSPECIFIED
Sefako, Ramotholo R.South African Astronomical Observatory, PO Box 9, Observatory 7935, Cape Town, South AfricaUNSPECIFIED
Smith, Alexis M.~S.alexis.smith (at) dlr.deUNSPECIFIED
Stalport, ManuObservatoire de Genève, Université de Genève, 51 Ch. des Maillettes, CH-1290 Sauverny, SwitzerlandUNSPECIFIED
Thomas, Jessymol K.South African Astronomical Observatory, PO Box 9, Observatory 7935, Cape Town, South AfricaUNSPECIFIED
Tilbrook, Rosanna H.School of Physics and Astronomy, University of Leicester, University Road, Leicester LE1 7RH, UKUNSPECIFIED
Udry, StephaneObservatoire Astronomique de l'Université de Genève, 51 Ch. des Maillettes, CH-1290 Versoix, SwitzerlandUNSPECIFIED
West, Richard GDepartment of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UKUNSPECIFIED
Wheatley, Peter JDepartment of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UKUNSPECIFIED
Worters, Hannah L.South African Astronomical Observatory, PO Box 9, Observatory 7935, Cape Town, South AfricaUNSPECIFIED
Vines, Jose I.Departamento de Astronomía, Universidad de Chile, Casilla 36-D, Santiago, ChileUNSPECIFIED
Alves, Douglas R.Departamento de Astronomía, Universidad de Chile, Casilla 36-D Santiago, ChileUNSPECIFIED
Date:August 2021
Journal or Publication Title:Monthly Notices of the Royal Astronomical Society
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:505
DOI :10.1093/mnras/stab1459
Page Range:pp. 2741-2752
Publisher:Oxford University Press
ISSN:0035-8711
Status:Published
Keywords:techniques: photometric, techniques: radial velocities, brown dwarfs, Astrophysics - Earth and Planetary Astrophysics, Astrophysics - Solar and Stellar 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:27 Oct 2021 08:29
Last Modified:27 Oct 2021 08:29

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