Vach, Sydney and Quinn, Samuel N. and Vanderburg, Andrew and Kane, Stephen R. and Collins, Karen A. and Kraus, Adam L. and Zhou, George and Medina, Amber A. and Schwarz, Richard P. and Collins, Kevin I. and Conti, Dennis M. and Stockdale, Chris and Massey, Bob and Suarez, Olga and Guillot, Tristan and Mékarnia, Djamel and Abe, Lyu and Dransfield, Georgina and Crouzet, Nicolas and Triaud, Amaury H. M. J. and Schmider, François-Xavier and Agabi, Abelkrim and Buttu, Marco and Furlan, Elise and Gnilka, Crystal L. and Howell, Steve B. and Ziegler, Carl and Briceño, César and Law, Nicholas and Mann, Andrew W. and Rudat, Alexander and Colón, Knicole D. and Rose, Mark E. and Kunimoto, Michelle and Günther, Maximilian N. and Charbonneau, David and Ciardi, David R. and Ricker, George R. and Vanderspek, Roland K. and Latham, David W. and Seager, Sara and Winn, Joshua N. and Jenkins, Jon M. (2021) TOI-712: a system of adolescent mini-Neptunes extending to the habitable zone. . (Unpublished) https://resolver.caltech.edu/CaltechAUTHORS:20220113-182240625
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Abstract
As an all-sky survey, NASA's TESS mission is able to detect the brightest and rarest types of transiting planetary systems, including young planets that enable study of the evolutionary processes that occur within the first billion years. Here, we report the discovery of a young, multi-planet system orbiting the bright K4.5V star, TOI-712 (V = 10.838, M⋆ = 0.733^(+0.026)_(−0.025) M_⊙, R⋆ = 0.674 ± 0.016 R_⊙, T_(eff) = 4622^(+61)_(−60) K). From the TESS light curve, we measure a rotation period of 12.48 days, and derive an age between about 500 Myr and 1.1 Gyr. The photometric observations reveal three transiting mini-Neptunes (R_b = 2.049^(+0.12)_(−0.080) R_⊕, R_c = 2.701^(+0.092)_(−0.082) R_⊕, R_d = 2.474^(+0.090)_(−0.082) R_⊕), with orbital periods of P_b = 9.531 days, P_c = 51.699 days, and P_d = 84.839 days. After modeling the three-planet system, an additional Earth-sized candidate is identified, TOI-712.05 (P = 4.32 days, R_P = 0.81 ± 0.11 R_⊕). We calculate that the habitable zone falls between 0.339 and 0.844 au (82.7 and 325.3 days), placing TOI-712 d near its inner edge. Among planetary systems harboring temperate planets, TOI-712 (T = 9.9) stands out as a relatively young star bright enough to motivate further characterization.
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| Additional Information: | Attribution 4.0 International (CC BY 4.0). We thank Adina Feinstein for helpful discussion regarding stellar flares in TESS data. SV and SNQ acknowledge support from the TESS Guest Investigator Program G03268 and NASA grant number 80NSSC21K1056. MNG acknowledges support from the European Space Agency (ESA) as an ESA Research Fellow. This work makes use of observations from the LCOGT network. Part of the LCOGT telescope time was granted by NOIRLab through the Mid-Scale Innovations Program (MSIP). MSIP is funded by NSF. Some of the observations in the paper made use of the High-Resolution Imaging instrument Zorro obtained under Gemini LLP Proposal Number: GN/S-2021A-LP-105. Zorro was funded by the NASA Exoplanet Exploration Program and built at the NASA Ames Research Center by Steve B. Howell, Nic Scott, Elliott P. Horch, and Emmett Quigley. Zorro was mounted on the Gemini North (and/or South) telescope of the international Gemini Observatory, a program of NSF’s OIR Lab, which is managed by the Association of Universities for Research in Astronomy (AURA) under a cooperative agreement with the National Science Foundation. on behalf of the Gemini partnership: the National Science Foundation (United States), National Research Council (Canada), Agencia Nacional de Investigación y Desarrollo (Chile), Ministerio de Ciencia, Tecnología e Innovación (Argentina), Ministério da Ciência, Tecnología, Inovaçõese Comunicações (Brazil), and Korea Astronomy and Space Science Institute (Republic of Korea). This research received funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (grant agreement n 803193/BEBOP), and from the Science and Technology Facilities Council (STFC; grant n ST/S00193X/1). This work makes use of observations from the ASTEP telescope. ASTEP benefited from the support of the French and Italian polar agencies IPEV and PNRA in the framework of the Concordia station program. Funding for the TESS mission is provided by NASA’s Science Mission directorate. We acknowledge the use of TESS public data from pipelines at the TESS Science Office and at the TESS Science Processing Operations Center. Resources supporting this work were provided by the NASA High-End Computing (HEC) Program through the NASA Advanced Supercomputing (NAS) Division at Ames Research Center for the production of the SPOC data products. This research has made use of the Exoplanet Follow-up Observation Program website, which is operated by the California Institute of Technology, under contract with the National Aeronautics and Space Administration under the Exoplanet Exploration Program. This paper includes data collected by the TESS mission, which are publicly available from the Mikulski Archive for Space Telescopes (MAST). This work has made use of data from the European Space Agency (ESA) mission Gaia (https://www.cosmos.esa.int/gaia), processed by the Gaia Data Processing and Analysis Consortium (DPAC, https://www.cosmos.esa.int/web/gaia/dpac/consortium). Funding for the DPAC has been provided by national institutions, in particular the institutions participating in the Gaia Multilateral Agreement. Facilities: TESS, LCOGT, ASTEP, Hazelwood. Software: AstroImageJ (Collins et al. 2017), astropy (Astropy Collaboration et al. 2013), batman (Kreidberg 2015) EXOFASTv2 (Eastman et al. 2019), exoplanet (Foreman-Mackey 2019), Matplotlib (Hunter 2007), Numpy (van der Walt et al. 2011), TAPIR (Jensen 2013). | ||||||||||||||||||||||||
| Group: | Infrared Processing and Analysis Center (IPAC) | ||||||||||||||||||||||||
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| Subject Keywords: | Exoplanets— Transits— Mini Neptunes— Exoplanet evolution | ||||||||||||||||||||||||
| Record Number: | CaltechAUTHORS:20220113-182240625 | ||||||||||||||||||||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20220113-182240625 | ||||||||||||||||||||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | ||||||||||||||||||||||||
| ID Code: | 112877 | ||||||||||||||||||||||||
| Collection: | CaltechAUTHORS | ||||||||||||||||||||||||
| Deposited By: | George Porter | ||||||||||||||||||||||||
| Deposited On: | 13 Jan 2022 21:06 | ||||||||||||||||||||||||
| Last Modified: | 13 Jan 2022 21:06 |
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