TY  - JOUR
Y1  - 2024/05//
N2  - We report the disco v ery of a brown dwarf orbiting a M1 host star. We first identified the brown dwarf within the Next Generation Transit Surv e y data, with supporting observations found in TESS sectors 11 and 38. We confirmed the disco v ery 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 M J , close to the hydrogen burning limit, and a radius of 0.95 ±0.05 R J . 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 disco v ery within this scarcely populated region.
ID  - discovery10191948
UR  - http://dx.doi.org/10.1093/mnras/stae508
VL  - 530
SP  - 318
JF  - Monthly Notices of the Royal Astronomical Society
PB  - OXFORD UNIV PRESS
A1  - Henderson, Beth A
A1  - Casewell, Sarah L
A1  - Goad, Michael R
A1  - Acton, Jack S
A1  - Guenther, Maximilian N
A1  - Nielsen, Louise D
A1  - Burleigh, Matthew R
A1  - Belardi, Claudia
A1  - Tilbrook, Rosanna H
A1  - Turner, Oliver
A1  - Howell, Steve B
A1  - Clark, Catherine A
A1  - Littlefield, Colin
A1  - Barkaoui, Khalid
A1  - Alves, Douglas R
A1  - Anderson, David R
A1  - Bayliss, Daniel
A1  - Bouchy, Francois
A1  - Bryant, Edward M
A1  - Dransfield, George
A1  - Ducrot, Elsa
A1  - Eigmueller, Philipp
A1  - Gill, Samuel
A1  - Gillen, Edward
A1  - Gillon, Michael
A1  - Hawthorn, Faith
A1  - Hooton, Matthew J
A1  - Jackman, James AG
A1  - Jehin, Emmanuel
A1  - Jenkins, James S
A1  - Kendall, Alicia
A1  - Lendl, Monika
A1  - Mccormac, James
A1  - Moyano, Maximiliano
A1  - Pedersen, Peter Pihlmann
A1  - Pozuelos, Francisco J
A1  - Ramsay, Gavin
A1  - Sefako, Ramotholo R
A1  - Timmermans, Mathilde
A1  - Triaud, Amaury HMJ
A1  - Udry, Stephane
A1  - Vines, Jose
A1  - Watson, Christopher A
A1  - West, Richard G
A1  - Wheatley, Peter J
A1  - Zuniga-Fernandez, Sebastian
TI  - NGTS-28Ab: a short period transiting brown dwarf
SN  - 0035-8711
AV  - public
IS  - 1
EP  - 339
N1  - © 2024 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society.
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.
KW  - (stars:) brown dwarfs
ER  -