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NGTS and WASP photometric recovery of a single-transit candidate from TESS

Gill, Samuel and Bayliss, D. and Cooke, Benjamin F. and Wheatley, P. and Nielsen, L. D. and Lendl, M and McCormac, J. J. and Bryant, Edward and Acton, Jack S. and Anderson, D. R. and Belardi, C. and Bouchy, F. and Burleigh, M. and Collier Cameron, A. and Casewell, S and Chaushev, Alexander and Goad, Michael R. and Günther, Maximilian N. and Hellier, C. and Jackman, James A.G. and Jenkins, J. and Moyano, Maximiliano and Pollacco, D. and Raynard, L. and Smith, Alexis M S and Tilbrook, Rosanna H. and Turner, Oliver and Udry, S. and West, R. G. (2020) NGTS and WASP photometric recovery of a single-transit candidate from TESS. Monthly Notices of the Royal Astronomical Society, 491 (2), pp. 1548-1553. Oxford University Press. doi: 10.1093/mnras/stz3212. ISSN 0035-8711.

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Abstract

The Transiting Exoplanet Survey Satellite (TESS) produces a large number of single-transit event candidates, since the mission monitors most stars for only ∼27 d. Such candidates correspond to long-period planets or eclipsing binaries. Using the TESS Sector 1 full-frame images, we identified a 7750 ppm single-transit event with a duration of 7 h around the moderately evolved F-dwarf star TIC-238855958 (Tmag = 10.23, Teff = 6280 ± 85 K). Using archival WASP photometry we constrained the true orbital period to one of three possible values. We detected a subsequent transit-event with NGTS, which revealed the orbital period to be 38.20 d. Radial velocity measurements from the CORALIE Spectrograph show the secondary object has a mass of M2 = 0.148 ± 0.003 M☉, indicating this system is an F-M eclipsing binary. The radius of the M-dwarf companion is R2 = 0.171 ± 0.003 R☉, making this one of the most well characterized stars in this mass regime. We find that its radius is 2.3σ lower than expected from stellar evolution models.

Item URL in elib:https://elib.dlr.de/136283/
Document Type:Article
Title:NGTS and WASP photometric recovery of a single-transit candidate from TESS
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Gill, SamuelDepartment 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
Cooke, Benjamin 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
Wheatley, P.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
Nielsen, L. D.Geneva Observatory, University of Geneva, Chemin des Mailettes 51, 1290 Versoix, SwitzerlandUNSPECIFIED
Lendl, MObservatoire 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. J.Centre for Exoplanets and Habitability, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK; Las Cumbres Observatory, 6740 Cortona Drive, Suite 102, Goleta, CA 93117, USAUNSPECIFIED
Bryant, EdwardCentre for Exoplanets and Habitability, University of Warwick , Gibbet Hill Road, Coventry CV4 7AL, UK Dept. of Physics, University of Warwick , Gibbet Hill Road, Coventry CV4 7AL, UKUNSPECIFIED
Acton, Jack 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
Belardi, C.Department of Physics and Astronomy, Leicester Institute of Space and Earth Observation, University of Leicester, University Road, Leicester LE1 7RH, UKUNSPECIFIED
Bouchy, F.Observatoire de l Universite de Geneve, 51 chemin des Maillettes, 1290 Sauverny, SwitzerlandUNSPECIFIED
Burleigh, M.Dept. of Physics and Astronomy, University of Leicester, United KingdomUNSPECIFIED
Collier Cameron, A.SUPA, School of Physics and Astronomy, University of St. Andrews, North Haugh, Fife KY16 9SS, UKUNSPECIFIED
Casewell, SDepartment of Physics and Astronomy, Leicester Institute of Space and Earth Observation, University of Leicester, University Road, Leicester LE1 7RHUNSPECIFIED
Chaushev, AlexanderCenter for Astronomy and Astrophysics, TU Berlin, Hardenbergstr. 36, 10623 Berlin, GermanyCenter for Astronomy and Astrophysics, TU Berlin, GermanyUNSPECIFIED
Goad, Michael R.Department of Physics and Astronomy, University of Leicester, University Road, Leicester LE1 7RH, UKUNSPECIFIED
Günther, Maximilian N.Department of Physics, and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USAUNSPECIFIED
Hellier, C.Astrophysics Group, Keele University, Staffordshire ST5 5BG, UKUNSPECIFIED
Jackman, James A.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
Jenkins, J.Departamento de Astronomía, Universidad de Chile, Santiago, ChileUNSPECIFIED
Moyano, MaximilianoInstituto de Astronomía, Universidad Católica del Norte, Angamos 0610, 1270709 Antofagasta, ChileUNSPECIFIED
Pollacco, D.Department of Physics, University of Warwick, Coventry CV4 7AL, UKUNSPECIFIED
Raynard, L.Department of Physics and Astronomy, Leicester Institute of Space and Earth Observation, University of Leicester, LE1 7RH, UKUNSPECIFIED
Smith, Alexis M SAlexis.Smith (at) dlr.dehttps://orcid.org/0000-0002-2386-4341
Tilbrook, Rosanna H.Department of Physics and Astronomy, University of Leicester, University Road, Leicester LE1 7RH, UKUNSPECIFIED
Turner, OliverObservatoire de Genève, Université de Genève, 51 Ch. des Maillettes, CH-1290 Sauverny, SwitzerlandUNSPECIFIED
Udry, S.Observatoire de Geneve, Universite de Geneve, 51 Chemin des Maillettes, 1290 Sauverny, SwitzerlandUNSPECIFIED
West, R. G.Department of Physics, University of Warwick, 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:491
DOI :10.1093/mnras/stz3212
Page Range:pp. 1548-1553
Publisher:Oxford University Press
ISSN:0035-8711
Status:Published
Keywords:binaries: eclipsing; Astrophysics - Solar and Stellar Astrophysics; 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 - Projekt COROT Beteiligung (old)
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Extrasolar Planets and Atmospheres
Deposited By: Smith, Dr Alexis M S
Deposited On:06 Oct 2020 08:19
Last Modified:06 Oct 2020 08:19

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