TOI-5126: a hot super-Neptune and warm Neptune pair discovered by TESS and CHEOPS
Article
Fairnington, Tyler R., Nabbie, Emma, Huang, Chelsea X., Zhou, George, Foo, Orion, Millholland, Sarah, Wright, Duncan, Belinski, Alexandre A., Bieryla, Allyson, Ciardi, David R., Collins, Karen A., Collins, Kevin I., Everett, Mark, Howell, Steve B., Lissauer, Jack J., Lund, Michael B., Murgas, Felipe, Palle, Enric, Quinn, Samuel N., ..., Eisner, Nora L.. 2024. "TOI-5126: a hot super-Neptune and warm Neptune pair discovered by TESS and CHEOPS." Monthly Notices of the Royal Astronomical Society. 527 (3). https://doi.org/10.1093/mnras/stad3036
Article Title | TOI-5126: a hot super-Neptune and warm Neptune pair discovered by TESS and CHEOPS |
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ERA Journal ID | 1074 |
Article Category | Article |
Authors | Fairnington, Tyler R., Nabbie, Emma, Huang, Chelsea X., Zhou, George, Foo, Orion, Millholland, Sarah, Wright, Duncan, Belinski, Alexandre A., Bieryla, Allyson, Ciardi, David R., Collins, Karen A., Collins, Kevin I., Everett, Mark, Howell, Steve B., Lissauer, Jack J., Lund, Michael B., Murgas, Felipe, Palle, Enric, Quinn, Samuel N., Relles, Howard M., Safonov, Boris S., Schwarz, Richard P., Scott, Nicholas J., Srdoc, Gregor, Ricker, George, Vanderspek, Roland, Seager, Sara, Latham, David W, Winn, Joshua W., Jenkins, Jon M., Bouma, Luke G., Shporer, Avi, Ting, Eric B., Dragomir, Diana, Kunimoto, Michelle . and Eisner, Nora L. |
Journal Title | Monthly Notices of the Royal Astronomical Society |
Journal Citation | 527 (3) |
Number of Pages | 16 |
Year | 2024 |
Publisher | Oxford University Press |
Place of Publication | United Kingdom |
ISSN | 0035-8711 |
1365-2966 | |
Digital Object Identifier (DOI) | https://doi.org/10.1093/mnras/stad3036 |
Web Address (URL) | https://academic.oup.com/mnras/article/527/3/8768/7303305 |
Abstract | We present the confirmation of a hot super-Neptune with an exterior Neptune companion orbiting a bright (V = 10.1 mag) F-dwarf identified by the Transiting Exoplanet Survey Satellite (TESS). The two planets, observed in sectors 45, 46, and 48 of the TESS extended mission, are 4.74+−001416 and 3.86+−001617 R with 5.4588385+−0000000720000070 and 17.8999+−0000130018 d orbital periods, respectively. We also obtained precise space-based photometric follow-up of the system with ESA’s CHaracterising ExOplanets Satellite to constrain the radius and ephemeris of TOI-5126 b. TOI-5126 b is located in the ‘hot Neptune Desert’ and is an ideal candidate for follow-up transmission spectroscopy due to its high-predicted equilibrium temperature (Teq = 1442+−4046 K) implying a cloud-free atmosphere. TOI-5126 c is a warm Neptune (Teq = 971+−2731 K) also suitable for follow-up. Tentative transit timing variations have also been identified in analysis, suggesting the presence of at least one additional planet, however this signal may be caused by spot-crossing events, necessitating further precise photometric follow-up to confirm these signals. |
Keywords | planets and satellites: detection; stars: individual TOI-5126; techniques: photometric, |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 510199. Astronomical sciences not elsewhere classified |
Byline Affiliations | Centre for Astrophysics |
Massachusetts Institute of Technology, United States | |
Moscow State University, Russia | |
Center for Astrophysics Harvard and Smithsonian, United States | |
NASA Exoplanet Science Institute, United States | |
George Mason University, United States | |
NSF's National Optical Infrared Astronomy Research Laboratory (NOIRLab), United States | |
NASA Ames Research Center, United States | |
Institute of Astrophysics of the Canary Islands, Spain | |
University of La Laguna, Spain | |
Kotizarovci Observatory, Croatia | |
Princeton University, United States | |
California Institute of Technology (Caltech), United States | |
University of New Mexico, United States | |
Flatiron Institute, United States |
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