TOI-1749 : An M dwarf with a Trio of Planets including a Near-resonant Pair
(2021) In Astronomical Journal 162(4).- Abstract
We report the discovery of one super-Earth- (TOI-1749b) and two sub-Neptune-sized planets (TOI-1749c and TOI-1749d) transiting an early M dwarf at a distance of 100 pc, which were first identified as planetary candidates using data from the TESS photometric survey. We have followed up this system from the ground by means of multiband transit photometry, adaptive optics imaging, and low-resolution spectroscopy, from which we have validated the planetary nature of the candidates. We find that TOI-1749b, c, and d have orbital periods of 2.39, 4.49, and 9.05 days, and radii of 1.4, 2.1, and 2.5 R ⊕, respectively. We also place 95% confidence upper limits on the masses of 57, 14, and 15 M ⊕ for TOI-1749b, c, and d, respectively, from transit... (More)
We report the discovery of one super-Earth- (TOI-1749b) and two sub-Neptune-sized planets (TOI-1749c and TOI-1749d) transiting an early M dwarf at a distance of 100 pc, which were first identified as planetary candidates using data from the TESS photometric survey. We have followed up this system from the ground by means of multiband transit photometry, adaptive optics imaging, and low-resolution spectroscopy, from which we have validated the planetary nature of the candidates. We find that TOI-1749b, c, and d have orbital periods of 2.39, 4.49, and 9.05 days, and radii of 1.4, 2.1, and 2.5 R ⊕, respectively. We also place 95% confidence upper limits on the masses of 57, 14, and 15 M ⊕ for TOI-1749b, c, and d, respectively, from transit timing variations. The periods, sizes, and tentative masses of these planets are in line with a scenario in which all three planets initially had a hydrogen envelope on top of a rocky core, and only the envelope of the innermost planet has been stripped away by photoevaporation and/or core-powered mass-loss mechanisms. These planets are similar to other planetary trios found around M dwarfs, such as TOI-175b,c,d and TOI-270b,c,d, in the sense that the outer pair has a period ratio within 1% of 2. Such a characteristic orbital configuration, in which an additional planet is located interior to a near 2:1 period-ratio pair, is relatively rare around FGK dwarfs.
(Less)
- author
- publishing date
- 2021-10
- type
- Contribution to journal
- publication status
- published
- in
- Astronomical Journal
- volume
- 162
- issue
- 4
- article number
- 167
- publisher
- IOP Publishing
- external identifiers
-
- scopus:85116388645
- ISSN
- 0004-6256
- DOI
- 10.3847/1538-3881/ac13a5
- language
- English
- LU publication?
- no
- additional info
- Publisher Copyright: © 2021. The American Astronomical Society. All rights reserved.
- id
- 464d8a60-ba24-4bcc-a2a5-a76577908f58
- date added to LUP
- 2023-02-01 10:00:28
- date last changed
- 2023-02-27 13:50:07
@article{464d8a60-ba24-4bcc-a2a5-a76577908f58,
abstract = {{<p>We report the discovery of one super-Earth- (TOI-1749b) and two sub-Neptune-sized planets (TOI-1749c and TOI-1749d) transiting an early M dwarf at a distance of 100 pc, which were first identified as planetary candidates using data from the TESS photometric survey. We have followed up this system from the ground by means of multiband transit photometry, adaptive optics imaging, and low-resolution spectroscopy, from which we have validated the planetary nature of the candidates. We find that TOI-1749b, c, and d have orbital periods of 2.39, 4.49, and 9.05 days, and radii of 1.4, 2.1, and 2.5 R ⊕, respectively. We also place 95% confidence upper limits on the masses of 57, 14, and 15 M ⊕ for TOI-1749b, c, and d, respectively, from transit timing variations. The periods, sizes, and tentative masses of these planets are in line with a scenario in which all three planets initially had a hydrogen envelope on top of a rocky core, and only the envelope of the innermost planet has been stripped away by photoevaporation and/or core-powered mass-loss mechanisms. These planets are similar to other planetary trios found around M dwarfs, such as TOI-175b,c,d and TOI-270b,c,d, in the sense that the outer pair has a period ratio within 1% of 2. Such a characteristic orbital configuration, in which an additional planet is located interior to a near 2:1 period-ratio pair, is relatively rare around FGK dwarfs.</p>}},
author = {{Fukui, A. and Korth, J. and Livingston, J. H. and Twicken, J. D. and Osorio, M. R.Zapatero and Jenkins, J. M. and Mori, M. and Murgas, F. and Ogihara, M. and Narita, N. and Pallé, E. and Stassun, K. G. and Nowak, G. and Ciardi, D. R. and Alvarez-Hernandez, L. and Béjar, V. J.S. and Casasayas-Barris, N. and Crouzet, N. and De Leon, J. P. and Esparza-Borges, E. and Soto, D. Hidalgo and Isogai, K. and Kawauchi, K. and Klagyivik, P. and Kodama, T. and Kurita, S. and Kusakabe, N. and Luque, R. and Madrigal-Aguado, A. and Rodriguez, P. Montanes and Morello, G. and Nishiumi, T. and Orell-Miquel, J. and Oshagh, M. and Parviainen, H. and Sánchez-Benavente, M. and Stangret, M. and Terada, Y. and Watanabe, N. and Chen, G. and Tamura, M. and Bosch-Cabot, P. and Bowen, M. and Eastridge, K. and Freour, L. and Gonzales, E. and Guerra, P. and Jundiyeh, Y. and Kim, T. K. and Kroer, L. V. and Levine, A. M. and Morgan, E. H. and Reefe, M. and Tronsgaard, R. and Wedderkopp, C. K. and Wittrock, J. and Collins, K. A. and Hesse, K. and Latham, D. W. and Ricker, G. R. and Seager, S. and Vanderspek, R. and Winn, J. and Bachelet, E. and Bowman, M. and McCully, C. and Daily, M. and Harbeck, D. and Volgenau, N. H.}},
issn = {{0004-6256}},
language = {{eng}},
number = {{4}},
publisher = {{IOP Publishing}},
series = {{Astronomical Journal}},
title = {{TOI-1749 : An M dwarf with a Trio of Planets including a Near-resonant Pair}},
url = {{http://dx.doi.org/10.3847/1538-3881/ac13a5}},
doi = {{10.3847/1538-3881/ac13a5}},
volume = {{162}},
year = {{2021}},
}