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NGTS-14Ab: a Neptune-sized transiting planet in the desert

Smith, Alexis M S and Acton, J.S. and Anderson, D.R. and Armstrong, D. J. and Bayliss, D. and Belardi, C. and Bouchy, F. and Brahm, R. and Briegal, Joshua and Bryant, E.M. and Burleigh, M.R. and Cabrera, J. and Chaushev, Alexander and Cooke, B. F. and Costes, Jean C. and Csizmadia, Sz. and Eigmueller, Ph. and Erikson, A. and Gill, S. and Gillen, Edward and Goad, M.R. and Gunther, M. N. and Henderson, B. A. and Hogan, A. and Jordán, A. and Lendl, M. and McCormac, J. and Moyano, M. and Nielsen, L. D. and Rauer, H. and Raynard, L. and Tilbrook, R.H. and Turner, O. and Udry, S. and Vines, Jose I and Watson, C. A. and West, R. G. and Wheatley, P. J. (2021) NGTS-14Ab: a Neptune-sized transiting planet in the desert. Astronomy and Astrophysics, 646, A183. EDP Sciences. doi: 10.1051/0004-6361/202039712. ISSN 0004-6361.

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Abstract

Context. The sub-Jovian, or Neptunian, desert is a previously identified region of parameter space where there is a relative dearth of intermediate-mass planets with short orbital periods. Aims: We present the discovery of a new transiting planetary system within the Neptunian desert, NGTS-14. Methods: Transits of NGTS-14Ab were discovered in photometry from the Next Generation Transit Survey (NGTS). Follow-up transit photometry was conducted from several ground-based facilities, as well as extracted from TESS full-frame images. We combine radial velocities from the HARPS spectrograph with the photometry in a global analysis to determine the system parameters. Results: NGTS-14Ab has a radius that is about 30 per cent larger than that of Neptune (0.444 ± 0.030 RJup) and is around 70 per cent more massive than Neptune (0.092 ± 0.012 MJup). It transits the main-sequence K1 star, NGTS-14A, with a period of 3.54 days, just far away enough to have maintained at least some of its primordial atmosphere. We have also identified a possible long-period stellar mass companion to the system, NGTS-14B, and we investigate the binarity of exoplanet host stars inside and outside the Neptunian desert using Gaia.

Item URL in elib:https://elib.dlr.de/141815/
Document Type:Article
Title:NGTS-14Ab: a Neptune-sized transiting planet in the desert
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Smith, Alexis M SAlexis.Smith (at) dlr.dehttps://orcid.org/0000-0002-2386-4341
Acton, J.S.Department of Physics and Astronomy, University of Leicester, University Road, Leicester, LE1 7RH, UKUNSPECIFIED
Anderson, D.R.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
Armstrong, D. J.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
Bayliss, D.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
Belardi, C.Department of Physics and Astronomy, University of Leicester, University Road, Leicester, LE1 7RH, UKUNSPECIFIED
Bouchy, F.Geneva Observatory, University of Geneva, Chemin des Mailettes 51, 1290, Versoix, SwitzerlandUNSPECIFIED
Brahm, R.Facultad de Ingeniería y Ciencias, Universidad Adolfo Ibáñez, Av. Diagonal las Torres 2640, Peñalolén, Santiago, Chile; Millennium Institute for Astrophysics, ChileUNSPECIFIED
Briegal, JoshuaAstrophysics Group, Cavendish Laboratory, J.J. Thomson Avenue, Cambridge CB3 0HE, UKUNSPECIFIED
Bryant, E.M.Dept. 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
Burleigh, M.R.Department of Physics and Astronomy, University of Leicester, University Road, Leicester, LE1 7RH, UKUNSPECIFIED
Cabrera, J.juan.cabrera (at) dlr.deUNSPECIFIED
Chaushev, AlexanderCenter for Astronomy and Astrophysics, TU Berlin, Hardenbergstr. 36, 10623 Berlin, GermanyCenter for Astronomy and Astrophysics, TU Berlin, GermanyUNSPECIFIED
Cooke, B. F.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
Costes, Jean C.Astrophysics Research Centre, Queen's University Belfast, 1 University Road, Belfast BT7 1NN, UKUNSPECIFIED
Csizmadia, Sz.szilard.csizmadia (at) dlr.dehttps://orcid.org/0000-0001-6803-9698
Eigmueller, Ph.philipp (at) eigmueller (at) dlr.deUNSPECIFIED
Erikson, A.anders.erikson (at) dlr.deUNSPECIFIED
Gill, S.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
Gillen, EdwardWinton Fellow.; Astrophysics Group, Cavendish Laboratory, J.J. Thomson Avenue, Cambridge CB3 0HE, UKUNSPECIFIED
Goad, M.R.Department of Physics and Astronomy, University of Leicester, University Road, Leicester, LE1 7RH, UKUNSPECIFIED
Gunther, M. N.Department of Physics, and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, USAUNSPECIFIED
Henderson, B. A.Department of Physics and Astronomy, University of Leicester , University Road, Leicester LE1 7RH, UKUNSPECIFIED
Hogan, A.Department of Physics and Astronomy, University of Leicester , University Road, Leicester LE1 7RH, UKUNSPECIFIED
Jordán, A.Facultad de Ingeniería y Ciencias, Universidad Adolfo Ibáñez, Av. Diagonal las Torres 2640, Peñalolén, Santiago, Chile; Millennium Institute for Astrophysics, ChileUNSPECIFIED
Lendl, M.Observatoire de Genève, Université de Genève, 51 Ch. des Maillettes, CH-1290 Sauverny, Switzerland; Space Research Institute, Austrian Academy of Sciences, Schmiedlstr. 6, A-8042 Graz, AustriaUNSPECIFIED
McCormac, J.Dept. 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, M.Instituto de Astronomía, Universidad Católica del Norte, Angamos 0610, Antofagasta, 1270709, ChileUNSPECIFIED
Nielsen, L. D.Geneva Observatory, University of Geneva, Chemin des Mailettes 51, 1290 Versoix, SwitzerlandUNSPECIFIED
Rauer, H.heike.rauer (at) dlr.deUNSPECIFIED
Raynard, L.Department of Physics and Astronomy, Leicester Institute of Space and Earth Observation, University of Leicester, LE1 7RH, UKUNSPECIFIED
Tilbrook, R.H.Department of Physics and Astronomy, University of Leicester, University Road, Leicester, LE1 7RH, UKUNSPECIFIED
Turner, O.Geneva Observatory, University of Geneva, Chemin des Mailettes 51, 1290, Versoix, SwitzerlandUNSPECIFIED
Udry, S.Geneva Observatory, University of Geneva, Chemin des Mailettes 51, 1290, Versoix, SwitzerlandUNSPECIFIED
Vines, Jose IDepartamento de Astronomía, Universidad de Chile, Camino el Observatorio 1515, Las Condes, Casilla 36-D, 7591245, Santiago, ChileUNSPECIFIED
Watson, C. A.Astrophysics Research Centre, Queen's University Belfast, Belfast BT7 1NN, UKUNSPECIFIED
West, R. G.Department of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL; Centre for Exoplanets and Habitability, University of Warwick, Gibbet Hill Road, Coventry CV4 7ALUNSPECIFIED
Wheatley, P. J.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
Date:2021
Journal or Publication Title:Astronomy and Astrophysics
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:646
DOI :10.1051/0004-6361/202039712
Page Range:A183
Publisher:EDP Sciences
ISSN:0004-6361
Status:Published
Keywords:planetary systems, planets and satellites: detection, planets and satellites: individual: NGTS-14Ab, binaries: general, 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
Institute of Planetary Research > Leitungsbereich PF
Deposited By: Smith, Dr Alexis M S
Deposited On:12 May 2021 07:59
Last Modified:12 May 2021 07:59

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