NGTS-28Ab: A short period transiting brown dwarf
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arXiv
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| Auteurs principaux: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2024
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| author | Henderson, Beth A. Casewell, Sarah L. Goad, Michael R. Acton, Jack S. Günther, Maximilian N. Nielsen, Louise D. Burleigh, Matthew R. Belardi, Claudia Tilbrook, Rosanna H. Turner, Oliver Howell, Steve B. Clark, Catherine A. Littlefield, Colin Barkaoui, Khalid Alves, Douglas R. Anderson, David R. Bayliss, Daniel Bouchy, Francois Bryant, Edward M. Dransfield, George Ducrot, Elsa Eigmüller, Philipp Gill, Samuel Gillen, Edward Gillon, Michaël Hawthorn, Faith Hooton, Matthew J. Jackman, James A. G. Jehin, Emmanuel Jenkins, James S. Kendall, Alicia Lendl, Monika McCormac, James Moyano, Maximiliano Pedersen, Peter Pihlmann Pozuelos, Francisco J. Ramsay, Gavin Sefako, Ramotholo R. Timmermans, Mathilde Triaud, Amaury H. M. J. Udry, Stephane Vines, Jose I. Watson, Christopher A. West, Richard G. Wheatley, Peter J. Zúñiga-Fernández, Sebastián |
| author_facet | Henderson, Beth A. Casewell, Sarah L. Goad, Michael R. Acton, Jack S. Günther, Maximilian N. Nielsen, Louise D. Burleigh, Matthew R. Belardi, Claudia Tilbrook, Rosanna H. Turner, Oliver Howell, Steve B. Clark, Catherine A. Littlefield, Colin Barkaoui, Khalid Alves, Douglas R. Anderson, David R. Bayliss, Daniel Bouchy, Francois Bryant, Edward M. Dransfield, George Ducrot, Elsa Eigmüller, Philipp Gill, Samuel Gillen, Edward Gillon, Michaël Hawthorn, Faith Hooton, Matthew J. Jackman, James A. G. Jehin, Emmanuel Jenkins, James S. Kendall, Alicia Lendl, Monika McCormac, James Moyano, Maximiliano Pedersen, Peter Pihlmann Pozuelos, Francisco J. Ramsay, Gavin Sefako, Ramotholo R. Timmermans, Mathilde Triaud, Amaury H. M. J. Udry, Stephane Vines, Jose I. Watson, Christopher A. West, Richard G. Wheatley, Peter J. Zúñiga-Fernández, Sebastián |
| contents | 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 characterise 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 SED 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2402_09943 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | NGTS-28Ab: A short period transiting brown dwarf Henderson, Beth A. Casewell, Sarah L. Goad, Michael R. Acton, Jack S. Günther, Maximilian N. Nielsen, Louise D. Burleigh, Matthew R. Belardi, Claudia Tilbrook, Rosanna H. Turner, Oliver Howell, Steve B. Clark, Catherine A. Littlefield, Colin Barkaoui, Khalid Alves, Douglas R. Anderson, David R. Bayliss, Daniel Bouchy, Francois Bryant, Edward M. Dransfield, George Ducrot, Elsa Eigmüller, Philipp Gill, Samuel Gillen, Edward Gillon, Michaël Hawthorn, Faith Hooton, Matthew J. Jackman, James A. G. Jehin, Emmanuel Jenkins, James S. Kendall, Alicia Lendl, Monika McCormac, James Moyano, Maximiliano Pedersen, Peter Pihlmann Pozuelos, Francisco J. Ramsay, Gavin Sefako, Ramotholo R. Timmermans, Mathilde Triaud, Amaury H. M. J. Udry, Stephane Vines, Jose I. Watson, Christopher A. West, Richard G. Wheatley, Peter J. Zúñiga-Fernández, Sebastián Earth and Planetary Astrophysics Solar and Stellar Astrophysics 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 characterise 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 SED 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. |
| title | NGTS-28Ab: A short period transiting brown dwarf |
| topic | Earth and Planetary Astrophysics Solar and Stellar Astrophysics |
| url | https://arxiv.org/abs/2402.09943 |