NGTS-28Ab: a short period transiting brown dwarf-Reference-Cited by-同舟云学术

NGTS-28Ab: a short period transiting brown dwarf

Published:2024-02-21 Issue:1 Volume:530 Page:318-339
ISSN:0035-8711
Container-title:Monthly Notices of the Royal Astronomical Society
language:en
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Author:

Henderson Beth A¹^ORCID,Casewell Sarah L¹,Goad Michael R¹,Acton Jack S¹^ORCID,Günther Maximilian N²^ORCID,Nielsen Louise D³,Burleigh Matthew R¹,Belardi Claudia¹,Tilbrook Rosanna H¹,Turner Oliver⁴^ORCID,Howell Steve B⁵,Clark Catherine A⁶⁷,Littlefield Colin⁵⁸,Barkaoui Khalid⁹¹⁰¹¹^ORCID,Alves Douglas R¹²¹³^ORCID,Anderson David R¹⁴¹⁵^ORCID,Bayliss Daniel¹⁴¹⁵^ORCID,Bouchy Francois⁴,Bryant Edward M¹⁶^ORCID,Dransfield George¹⁷,Ducrot Elsa¹⁸,Eigmüller Philipp¹⁹,Gill Samuel¹⁴¹⁵,Gillen Edward²⁰²¹^ORCID,Gillon Michaël⁹^ORCID,Hawthorn Faith¹⁴¹⁵^ORCID,Hooton Matthew J²²^ORCID,Jackman James A G¹⁴¹⁵²³^ORCID,Jehin Emmanuel²⁴,Jenkins James S¹³²⁵,Kendall Alicia¹,Lendl Monika⁴^ORCID,McCormac James¹⁴¹⁵,Moyano Maximiliano²⁶,Pedersen Peter Pihlmann²²²⁷,Pozuelos Francisco J²⁸,Ramsay Gavin²⁹^ORCID,Sefako Ramotholo R³⁰,Timmermans Mathilde⁹,Triaud Amaury H M J¹⁷^ORCID,Udry Stephane⁴,Vines Jose I²⁶,Watson Christopher A³¹,West Richard G¹⁴¹⁵^ORCID,Wheatley Peter J¹⁴¹⁵^ORCID,Zúñiga-Fernández Sebastián⁹^ORCID

Affiliation:

1. School of Physics and Astronomy, University of Leicester , University Road , Leicester LE1 7RH, UK

2. European Space Agency (ESA), European Space Research and Technology Centre (ESTEC) , Keplerlaan 1, NL-2201 AZ Noordwijk , the Netherlands

3. European Southern Observatory , Karl-Schwarzschildstr. 2, D-85748 Garching bei München , Germany

4. Département d’astronomie, Université de Genéve , 51 chemin Pegasi, CH-1290 Sauverny , Switzerland

5. NASA Ames Research Center, Moffett Field , CA 94035 , USA

6. Jet Propulsion Laboratory, California Institute of Technology , Pasadena, CA 91109 , USA

7. NASA Exoplanet Science Institute, IPAC, California Institute of Technology , Pasadena, CA 91125 , USA

8. Bay Area Environmental Research Institute , Moffett Field, CA 94035 , USA

9. Astrobiology Research Unit, Université de Liège , Allée du 6 Août 19C, B-4000 Liège , Belgium

10. Department of Earth, Atmospheric and Planetary Science, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, MA 02139 , USA

11. Instituto de Astrofísica de Canarias (IAC) , Calle Vía Láctea s/n, 38200, La Laguna, Tenerife , Spain

12. Departamento de Astronomía, Universidad de Chile , Casilla 36-D, Santiago , Chile

13. Centro de Astrofísica y Tecnologías Afines (CATA) , Casilla 36-D, Santiago , Chile

14. Centre for Exoplanets and Habitability, University of Warwick, Gibbet Hill Road , Coventry CV4 7AL , UK

15. Department of Physics, University of Warwick , Gibbet Hill Road, Coventry CV4 7AL , UK

16. Mullard Space Science Laboratory, University College London , Holmbury St Mary, Dorking, Surrey RH5 6NT , UK

17. School of Physics & Astronomy, University of Birmingham , Edgbaston, Birmingham B15 2TT , UK

18. AIM, CEA, CNRS, Université Paris-Saclay, Université de Paris , F-91191 Gif-sur-Yvette , France

19. Institute of Planetary Research, German Aerospace Center , Rutherfordstrasse 2, D-12489 Berlin , Germany

20. Astronomy Unit, Queen Mary University of London , Mile End Road, London E1 4NS , UK

21. Astrophysics Group, Cavendish Laboratory , J.J. Thomson Avenue, Cambridge CB3 0HE , UK

22. Cavendish Laboratory, JJ Thomson Avenue , Cambridge CB3 0HE , UK

23. School of Earth and Space Exploration, Arizona State University , Tempe, AZ 85287 , USA

24. STAR Institute, University of Liége , Allée du 6 Août 19c, B-4000 Liége , Belgium

25. Núcleo de Astronomía, Facultad de Ingeniería y Ciencias, Universidad Diego Portales , Av. Ejército 441, Santiago , Chile

26. Instituto de Astronomía, Universidad Católica del Norte , Angamos 0610, Antofagasta 1270709 , Chile

27. Department of Physics, ETH Zurich , Wolfgang-Pauli-Strasse 2, CH-8093 Zurich , Switzerland

28. Instituto de Astrofísica de Andalucía (IAA-CSIC) , Glorieta de la Astronomía s/n, E-18008 Granada , Spain

29. Armagh Observatory & Planetarium , College Hill, Armagh BT61 9DG , UK

30. South African Astronomical Observatory , PO Box 9, Observatory 7935, Cape Town , South Africa

31. Astrophysics Research Centre, School of Mathematics and Physics, Queen’s University Belfast , BT7 1NN Belfast , UK

Abstract

ABSTRACT We report the discovery of a brown dwarf orbiting a M1 host star. We first identified the brown dwarf within the Next Generation Transit Survey data, with supporting observations found in TESS sectors 11 and 38. We confirmed the discovery with follow-up photometry from the South African Astronomical Observatory, SPECULOOS-S, and TRAPPIST-S, and radial velocity measurements from HARPS, which allowed us to characterize the system. We find an orbital period of ∼1.25 d, a mass of $69.0^{+5.3}_{-4.8}$ MJ, close to the hydrogen burning limit, and a radius of 0.95 ± 0.05 RJ. We determine the age to be >0.5 Gyr, using model isochrones, which is found to be in agreement with spectral energy distribution fitting within errors. NGTS-28Ab is one of the shortest period systems found within the brown dwarf desert, as well as one of the highest mass brown dwarfs that transits an M dwarf. This makes NGTS-28Ab another important discovery within this scarcely populated region.

Funder

European Southern Observatory

Science and Technology Facilities Council

Diabetes Patient Advocacy Coalition

Publisher

Oxford University Press (OUP)

Link

https://academic.oup.com/mnras/advance-article-pdf/doi/10.1093/mnras/stae508/56732879/stae508.pdf

Reference144 articles.

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2. Models of very-low-mass stars, brown dwarfs and exoplanets

3. NGTS-21b: an inflated Super-Jupiter orbiting a metal-poor K dwarf

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