Henderson, Beth A;
Casewell, Sarah L;
Goad, Michael R;
Acton, Jack S;
Guenther, Maximilian N;
Nielsen, Louise D;
Burleigh, Matthew R;
... Zuniga-Fernandez, Sebastian; + view all
(2024)
NGTS-28Ab: a short period transiting brown dwarf.
Monthly Notices of the Royal Astronomical Society
, 530
(1)
pp. 318-339.
10.1093/mnras/stae508.
Preview |
PDF
stae508.pdf - Published Version Download (9MB) | Preview |
Abstract
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.
| Type: | Article |
|---|---|
| Title: | NGTS-28Ab: a short period transiting brown dwarf |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1093/mnras/stae508 |
| Publisher version: | http://dx.doi.org/10.1093/mnras/stae508 |
| Language: | English |
| Additional information: | © 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. |
| Keywords: | (stars:) brown dwarfs |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Space and Climate Physics |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10191948 |
Archive Staff Only
 |
View Item |
