Planet Hunters TESS III: two transiting planets around the bright G dwarf HD 152843
Article
Eisner, N. L., Nicholson, B. A., Barragan, O., Aigrain, S., Lintott, C., Kaye, L., Klein, B., Miller, G., Taylor, J., Zicher, N., Buchhave, L. A., Caldwell, D. A., Horner, J., Llama, J., Mortier, A., Rajpaul, V. M., Stassun, K., Sporer, A., Tkachenko, A., ..., Wilson, G. M.. 2021. "Planet Hunters TESS III: two transiting planets around the bright G dwarf HD 152843." Monthly Notices of the Royal Astronomical Society. 505 (2), pp. 1827-1840. https://doi.org/10.1093/mnras/stab1253
| Article Title | Planet Hunters TESS III: two transiting planets around the bright G dwarf HD 152843 |
|---|---|
| ERA Journal ID | 1074 |
| Article Category | Article |
| Authors | Eisner, N. L., Nicholson, B. A., Barragan, O., Aigrain, S., Lintott, C., Kaye, L., Klein, B., Miller, G., Taylor, J., Zicher, N., Buchhave, L. A., Caldwell, D. A., Horner, J., Llama, J., Mortier, A., Rajpaul, V. M., Stassun, K., Sporer, A., Tkachenko, A., Jenkins, J. M., Latham, D., Ricker, G., Seager, S., Winn, J., Alhassan, S., Baeten, E. M. L., Bean, S.J., Bundy, D. M., Efremov, V., Ferstenou, R., Goodwin, B. L., Hof, M., Hoffman, T., Hubert, A., Lau, L., Lee, S., Maetschke, D., Peltsch, K., Rubio-Alfaro, C. and Wilson, G. M. |
| Journal Title | Monthly Notices of the Royal Astronomical Society |
| Journal Citation | 505 (2), pp. 1827-1840 |
| Number of Pages | 14 |
| Year | 2021 |
| Publisher | Oxford University Press |
| Place of Publication | United Kingdom |
| ISSN | 0035-8711 |
| 1365-2966 | |
| Digital Object Identifier (DOI) | https://doi.org/10.1093/mnras/stab1253 |
| Web Address (URL) | https://academic.oup.com/mnras/article/505/2/1827/6274703 |
| Abstract | We report on the discovery and validation of a two-planet system around a bright (V = 8.85 mag) early G dwarf (1.43 R⊙, 1.15 M⊙, TOI 2319) using data from NASA's Transiting Exoplanet Survey Satellite (TESS). Three transit events from two planets were detected by citizen scientists in the month-long TESS light curve (sector 25), as part of the Planet Hunters TESS project. Modelling of the transits yields an orbital period of $11.6264 _{ - 0.0025 } ^ { + 0.0022 }$ d and radius of $3.41 _{ - 0.12 } ^ { + 0.14 }$ R⊕ for the inner planet, and a period in the range 19.26-35 d and a radius of $5.83 _{ - 0.14 } ^ { + 0.14 }$ R⊕ for the outer planet, which was only seen to transit once. Each signal was independently statistically validated, taking into consideration the TESS light curve as well as the ground-based spectroscopic follow-up observations. Radial velocities from HARPS-N and EXPRES yield a tentative detection of planet b, whose mass we estimate to be $11.56 _{ - 6.14 } ^ { + 6.58 }$ M⊕, and allow us to place an upper limit of 27.5 M⊕ (99 per cent confidence) on the mass of planet c. Due to the brightness of the host star and the strong likelihood of an extended H/He atmosphere on both planets, this system offers excellent prospects for atmospheric characterization and comparative planetology. |
| Keywords | methods: statistical; planets and satellites: detection; stars: fundamental parameters; stars: individual: TIC 349488688, HD152843 |
| ANZSRC Field of Research 2020 | 510109. Stellar astronomy and planetary systems |
| Public Notes | This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2021 the Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved. |
| Byline Affiliations | University of Oxford, United Kingdom |
| Centre for Astrophysics | |
| Oxlea NHS Foundation Trust, United Kingdom | |
| Technical University of Denmark, Denmark | |
| SETI Institute, United States | |
| Lowell Observatory, United States | |
| University of Cambridge, United Kingdom | |
| Vanderbilt University, United States | |
| Massachusetts Institute of Technology, United States | |
| Catholic University of Leuven, Belgium | |
| National Aeronautics and Space Administration (NASA), United States | |
| Center for Astrophysics Harvard and Smithsonian, United States | |
| Princeton University, United States |
Permalink -
https://research.usq.edu.au/item/w13x6/planet-hunters-tess-iii-two-transiting-planets-around-the-bright-g-dwarf-hd-152843
Download files
56
total views24
total downloads6
views this month1
downloads this month