TOI-4336 A b: A temperate sub-Neptune ripe for atmospheric characterization in a nearby triple M-dwarf system
Year: 2024
Type: article
Abstract: Context. Small planets transiting bright nearby stars are essential to our understanding of the formation and evolution of exoplanetary systems. However, few constitute prime targets for atmospheric characterization, and even fewer are part of multiple star systems. Aims. This work aims to validate TOI-4336 A b, a sub-Neptune-sized exoplanet candidate identified by the TESS space-based transit survey around a nearby M dwarf. Methods. We validated the planetary nature of TOI-4336 A b through the global analysis of TESS and follow-up multi-band high-precision photometric data from ground-based telescopes, medium- and high-resolution spectroscopy of the host star, high-resolution speckle imaging, and archival images. Results. The newly discovered exoplanet TOI-4336 A b has a radius of 2.1 ± 0.1 R ⊕ . Its host star is an M3.5-dwarf star with a mass of 0.33 ± 0.01 M ⊙ and a radius of 0.33 ± 0.02 R ⊙ , and is a member of a hierarchical triple M-dwarf system 22 pc away from the Sun. The planet’s orbital period of 16.3 days places it at the inner edge of the habitable zone of its host star, which is the brightest of the inner binary pair. The parameters of the system make TOI-4336 A b an extremely promising target for the detailed atmospheric characterization of a temperate sub-Neptune by transit transmission spectroscopy with JWST.
DOI: 10.17615/6rbk-by49
Authors: Garcia, L. J., Collins, K. A., Zúñiga-Fernández, S., Ducrot, E., Murray, C. A., Davoudi, F., Sebastian, D., Jehin, E., Queloz, D., Stassun, K. G., Horne, K., Thompson, S., Winn, J. N., Mann, A. W., Ricker, G., Bonfils, X., Gillon, M., Ghachoui, M., Dransfield, G., Dévora-Pajares, M., Demory, B.-O., Fong, W., Burgasser, A. J., de Wit, J., Schwarz, R. P., Striegel, S., Law, N., Kaltenegger, L., Jenkins, J. M., Raymond, S. N., Vanderspek, R., Smart, R. L., Delrez, L., Chew, Y. Gómez Maqueo, Timmermans, M., Briceño, C., Barkaoui, K., Almenara, J. M., Pass, E. K., Murgas, F., Pedersen, P. P., Aganze, C., Rackham, B. V., Günther, M. N., Cointepas, M., Howell, S. B., Quinn, S. N., Ziegler, C., Srdoc, G., Pozuelos, F. J., Triaud, A. H. M. J., Benkhaldoun, Z., Christiansen, J. L., Fűrész, G., Hooton, M. J., Seager, S., Rowden, P.
Institution: University of North Carolina at Chapel Hill
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Funders: National Science Foundation, National Aeronautics and Space Administration, Simons Foundation, California Institute of Technology, Michigan State University, Space Telescope Science Institute, Heising-Simons Foundation, European Space Agency, European Commission, Agence Nationale de la Recherche, Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung, Fonds De La Recherche Scientifique - FNRS, Fédération Wallonie-Bruxelles, Ministério da Ciência, Tecnologia e Inovação, Ministry of Science, ICT and Future Planning, Korea Astronomy and Space Science Institute, Centre National de la Recherche Scientifique, Ministério da Ciência, Tecnologia, Inovações e Comunicações, Fondation Francqui - Stichting, Agencia Nacional de Investigación y Desarrollo, Ames Research Center, Goddard Space Flight Center, College of Engineering, Michigan State University, University of North Carolina at Chapel Hill, Science Mission Directorate, Science and Technology Facilities Council, Fonds pour la Formation à la Recherche dans l’Industrie et dans l’Agriculture, Staatssekretariat für Bildung, Forschung und Innovation, Agencia Estatal de Investigación, U.S. Naval Observatory, FP7 Ideas: European Research Council
Awards: G101150294, G1175115578, G1430117670, G1853635042, G18599350, G201248631, G2015176793, G210041235, Red-enhanced cameras to seek rocky planets transiting Ultra-Cool Dwarfs, G2262748287, G2601397997, G2713276326, G300979063, G3106129878, G3207356259, Exoplanets in Transit and their Atmosphere, G34346518, G3452655474, G3480869486, G3681454997, G3827351950, G39620777, G4030817349, G4042783231, G425668148, G4334099265, G434337789, G463062595, G4919915994, G5059192377, G5080475149, G5180915604, G5195188938, G5537318980, G5795665120, G5894067328, G6201089904, G6219865358, G623270878, G6344031981, G6693794689, G6866600364, G6885269781, G7084143925, G7288031051, G7303466041, G7518687652, G7550253023, G7553243680, G7576874667, VLSI-Systeme mit optischen Verbindungen - Vorstudie der technologischen Machbarkeit -, G8211471405, Alexander von Humboldt and the Globalization of Science: Networks of Knowledge between Germany and the United States in the 19th Century, Running costs of the Ganymede Telescope., G8498429987, G8597195001, G8684520763, Paris Region Fellowship Programme, G878044590, G896728979
OpenAlex ID: W4404670169