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NGTS-12b: A sub-Saturn mass transiting exoplanet in a 7.53 day orbit

Bryant, Edward M and Bayliss, Daniel and Nielsen, Louise D and Veras, Dimitri and Acton, Jack S and Anderson, David R and Armstrong, David J and Bouchy, François and Briegal, Joshua T and Burleigh, Matthew R and Cabrera Perez, Juan and Casewell, Sarah L and Chaushev, Alexander and Cooke, Benjamin F and Csizmadia, Szilard and Eigmüller, Philipp and Erikson, Anders and Gill, Samuel and Gillen, Edward and Goad, Michael R and Grieves, Nolan and Günther, Maximilian N and Henderson, Beth and Hogan, Aleisha and Jenkins, James S and Lendl, Monika and McCormac, James and Moyano, Maximiliano and Queloz, Didier and Rauer, Heike and Raynard, Liam and Smith, Alexis M S and Tilbrook, Rosanna H and Udry, Stéphane and Vines, Jose I and Watson, Christopher A and West, Richard G and Wheatley, Peter J (2020) NGTS-12b: A sub-Saturn mass transiting exoplanet in a 7.53 day orbit. Monthly Notices of the Royal Astronomical Society, 499 (3), pp. 3139-3148. Oxford University Press. doi: 10.1093/mnras/staa2976. ISSN 0035-8711.

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Official URL: https://academic.oup.com/mnras/article/499/3/3139/5912453

Abstract

We report the discovery of the transiting exoplanet NGTS-12b by the Next Generation Transit Survey (NGTS). The host star, NGTS-12, is a V=12.38 mag star with an effective temperature of Teff=5690 ± 130 K. NGTS-12b orbits with a period of P = 7.53 d, making it the longest period planet discovered to date by the main NGTS survey. We verify the NGTS transit signal with data extracted from the TESS full-frame images, and combining the photometry with radial velocity measurements from HARPS and FEROS we determine NGTS-12b to have a mass of 0.208 ± 0.022 MJ and a radius of 1.048 ± 0.032 RJ. NGTS-12b sits on the edge of the Neptunian desert when we take the stellar properties into account, highlighting the importance of considering both the planet and star when studying the desert. The long period of NGTS-12b combined with its low density of just 0.223 ± 0.029 g cm-3 make it an attractive target for atmospheric characterization through transmission spectroscopy with a Transmission Spectroscopy Metric of 89.4.

Item URL in elib:https://elib.dlr.de/136677/
Document Type:Article
Title:NGTS-12b: A sub-Saturn mass transiting exoplanet in a 7.53 day orbit
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Bryant, Edward MDept. of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UKUNSPECIFIED
Bayliss, DanielDept. of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UKUNSPECIFIED
Nielsen, Louise DObservatoire de Genève, Université de Genève, Chemin des Maillettes 51, 1290 Sauverny, SwitzerlandUNSPECIFIED
Veras, DimitriDept. of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UKUNSPECIFIED
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
Armstrong, David JDept. of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UKUNSPECIFIED
Bouchy, FrançoisObservatoire de Genève, Université de Genève, Chemin des Maillettes 51, 1290 Sauverny, SwitzerlandUNSPECIFIED
Briegal, Joshua TAstrophysics Group, Cavendish Laboratory, J.J. Thomson Avenue, Cambridge CB3 0HE, UKUNSPECIFIED
Burleigh, Matthew RSchool of Physics and Astronomy, University of Leicester, Leicester, LE1 7RH, UKUNSPECIFIED
Cabrera Perez, JuanJuan.Cabrera (at) dlr.dehttps://orcid.org/0000-0001-6653-5487
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
Csizmadia, Szilardszilard.csizmadia (at) dlr.deUNSPECIFIED
Eigmüller, PhilippPhilipp.Eigmueller (at) dlr.dehttps://orcid.org/0000-0003-4096-0594
Erikson, Andersanders.erikson (at) dlr.deUNSPECIFIED
Gill, SamuelDept. of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UKUNSPECIFIED
Gillen, EdwardAstronomy Unit, Queen Mary University of London, Mile End Road, London E1 4NS, UKUNSPECIFIED
Goad, Michael RSchool of Physics and Astronomy, University of Leicester, Leicester, LE1 7RH, UKUNSPECIFIED
Grieves, NolanObservatoire de Genève, Université de Genève, Chemin des Maillettes 51, 1290 Sauverny, SwitzerlandUNSPECIFIED
Günther, Maximilian NDepartment of Physics, and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USAUNSPECIFIED
Henderson, BethSchool of Physics and Astronomy, University of Leicester, Leicester, LE1 7RH, UKUNSPECIFIED
Hogan, AleishaSchool of Physics and Astronomy, University of Leicester, Leicester, LE1 7RH, UKUNSPECIFIED
Jenkins, James SDepartamento de Astronomia, Universidad de Chile, Casilla 36-D, Santiago, ChileUNSPECIFIED
Lendl, MonikaObservatoire de Genève, Université de Genève, Chemin des Maillettes 51, 1290 Sauverny, SwitzerlandUNSPECIFIED
McCormac, JamesDept. of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UKUNSPECIFIED
Moyano, MaximilianoInstituto de Astronomía, Universidad Católica del Norte, Casa Central, Angamos 0610, 1270709, Antofagasta, ChileUNSPECIFIED
Queloz, DidierAstrophysics Group, Cavendish Laboratory, J.J. Thomson Avenue, Cambridge CB3 0HE, UKUNSPECIFIED
Rauer, HeikeHeiker.Rauer (at) dlr.deUNSPECIFIED
Raynard, LiamSchool of Physics and Astronomy, University of Leicester, Leicester, LE1 7RH, UKUNSPECIFIED
Smith, Alexis M SAlexis.Smith (at) dlr.dehttps://orcid.org/0000-0002-2386-4341
Tilbrook, Rosanna HSchool of Physics and Astronomy, University of Leicester, Leicester, LE1 7RH, UKUNSPECIFIED
Udry, StéphaneObservatoire de Genève, Université de Genève, Chemin des Maillettes 51, 1290 Sauverny, SwitzerlandUNSPECIFIED
Vines, Jose IDepartamento de Astronomia, Universidad de Chile, Casilla 36-D, Santiago, ChileUNSPECIFIED
Watson, Christopher AAstrophysics Research Centre, School of Mathematics and Physics, Queen's University Belfast, BT7 1NN Belfast, UKUNSPECIFIED
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:2020
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:499
DOI :10.1093/mnras/staa2976
Page Range:pp. 3139-3148
Publisher:Oxford University Press
ISSN:0035-8711
Status:Published
Keywords:techniques: photometric; stars: individual: NGTS-12; planetary systems; 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 (old)
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Extrasolar Planets and Atmospheres
Institute of Planetary Research > Leitungsbereich PF
Deposited By: Eigmüller, Dr. Philipp
Deposited On:04 Nov 2020 08:45
Last Modified:04 Nov 2020 08:45

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