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:

Authors	Institution or Email of Authors	Author's ORCID iD	ORCID Put Code
Bryant, Edward M	Dept. of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK	UNSPECIFIED	UNSPECIFIED
Bayliss, Daniel	Dept. of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK	UNSPECIFIED	UNSPECIFIED
Nielsen, Louise D	Observatoire de Genève, Université de Genève, Chemin des Maillettes 51, 1290 Sauverny, Switzerland	UNSPECIFIED	UNSPECIFIED
Veras, Dimitri	Dept. of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK	UNSPECIFIED	UNSPECIFIED
Acton, Jack S	School of Physics and Astronomy, University of Leicester, Leicester, LE1 7RH, UK	UNSPECIFIED	UNSPECIFIED
Anderson, David R	Dept. of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK	UNSPECIFIED	UNSPECIFIED
Armstrong, David J	Dept. of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK	UNSPECIFIED	UNSPECIFIED
Bouchy, François	Observatoire de Genève, Université de Genève, Chemin des Maillettes 51, 1290 Sauverny, Switzerland	UNSPECIFIED	UNSPECIFIED
Briegal, Joshua T	Astrophysics Group, Cavendish Laboratory, J.J. Thomson Avenue, Cambridge CB3 0HE, UK	UNSPECIFIED	UNSPECIFIED
Burleigh, Matthew R	School of Physics and Astronomy, University of Leicester, Leicester, LE1 7RH, UK	UNSPECIFIED	UNSPECIFIED
Cabrera Perez, Juan	UNSPECIFIED	https://orcid.org/0000-0001-6653-5487	UNSPECIFIED
Casewell, Sarah L	School of Physics and Astronomy, University of Leicester, Leicester, LE1 7RH, UK	UNSPECIFIED	UNSPECIFIED
Chaushev, Alexander	Center for Astronomy and Astrophysics, TU Berlin, Hardenbergstr. 36, D-10623 Berlin, Germany	UNSPECIFIED	UNSPECIFIED
Cooke, Benjamin F	Dept. of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK	UNSPECIFIED	UNSPECIFIED
Csizmadia, Szilard	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED
Eigmüller, Philipp	UNSPECIFIED	https://orcid.org/0000-0003-4096-0594	UNSPECIFIED
Erikson, Anders	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED
Gill, Samuel	Dept. of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK	UNSPECIFIED	UNSPECIFIED
Gillen, Edward	Astronomy Unit, Queen Mary University of London, Mile End Road, London E1 4NS, UK	UNSPECIFIED	UNSPECIFIED
Goad, Michael R	School of Physics and Astronomy, University of Leicester, Leicester, LE1 7RH, UK	UNSPECIFIED	UNSPECIFIED
Grieves, Nolan	Observatoire de Genève, Université de Genève, Chemin des Maillettes 51, 1290 Sauverny, Switzerland	UNSPECIFIED	UNSPECIFIED
Günther, Maximilian N	Department of Physics, and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA	UNSPECIFIED	UNSPECIFIED
Henderson, Beth	School of Physics and Astronomy, University of Leicester, Leicester, LE1 7RH, UK	UNSPECIFIED	UNSPECIFIED
Hogan, Aleisha	School of Physics and Astronomy, University of Leicester, Leicester, LE1 7RH, UK	UNSPECIFIED	UNSPECIFIED
Jenkins, James S	Departamento de Astronomia, Universidad de Chile, Casilla 36-D, Santiago, Chile	UNSPECIFIED	UNSPECIFIED
Lendl, Monika	Observatoire de Genève, Université de Genève, Chemin des Maillettes 51, 1290 Sauverny, Switzerland	UNSPECIFIED	UNSPECIFIED
McCormac, James	Dept. of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK	UNSPECIFIED	UNSPECIFIED
Moyano, Maximiliano	Instituto de Astronomía, Universidad Católica del Norte, Casa Central, Angamos 0610, 1270709, Antofagasta, Chile	UNSPECIFIED	UNSPECIFIED
Queloz, Didier	Astrophysics Group, Cavendish Laboratory, J.J. Thomson Avenue, Cambridge CB3 0HE, UK	UNSPECIFIED	UNSPECIFIED
Rauer, Heike	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED
Raynard, Liam	School of Physics and Astronomy, University of Leicester, Leicester, LE1 7RH, UK	UNSPECIFIED	UNSPECIFIED
Smith, Alexis M S	UNSPECIFIED	https://orcid.org/0000-0002-2386-4341	UNSPECIFIED
Tilbrook, Rosanna H	School of Physics and Astronomy, University of Leicester, Leicester, LE1 7RH, UK	UNSPECIFIED	UNSPECIFIED
Udry, Stéphane	Observatoire de Genève, Université de Genève, Chemin des Maillettes 51, 1290 Sauverny, Switzerland	UNSPECIFIED	UNSPECIFIED
Vines, Jose I	Departamento de Astronomia, Universidad de Chile, Casilla 36-D, Santiago, Chile	UNSPECIFIED	UNSPECIFIED
Watson, Christopher A	Astrophysics Research Centre, School of Mathematics and Physics, Queen's University Belfast, BT7 1NN Belfast, UK	UNSPECIFIED	UNSPECIFIED
West, Richard G	Dept. of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK	UNSPECIFIED	UNSPECIFIED
Wheatley, Peter J	Dept. of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK	UNSPECIFIED	UNSPECIFIED

Date:

2020

Journal or Publication Title:

Monthly Notices of the Royal Astronomical Society

Refereed publication:

Yes

Open Access:

Yes

Gold Open Access:

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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