TOI-4336 A b: A temperate sub-Neptune ripe for atmospheric characterization in a nearby triple M-dwarf system
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.
Authors
- M. Ghachoui
- M. Cointepas
- Samuel N. Quinn (ORCID: https://orcid.org/0000-0002-8964-8377)
- Benjamin V. Rackham (ORCID: https://orcid.org/0000-0002-3627-1676)
- Jon M. Jenkins (ORCID: https://orcid.org/0000-0002-4715-9460)
- Maximilian N. Günther (ORCID: https://orcid.org/0000-0002-3164-9086)
- Julien de Wit (ORCID: https://orcid.org/0000-0003-2415-2191)
- Gábor Fürész
- Andrew W. Mann (ORCID: https://orcid.org/0000-0003-3654-1602)
- M. Gillon (ORCID: https://orcid.org/0000-0003-1462-7739)
- C. A. Murray (ORCID: https://orcid.org/0000-0001-8504-5862)
- Daniel Sebastian (ORCID: https://orcid.org/0000-0002-2214-9258)
- F. J. Pozuelos (ORCID: https://orcid.org/0000-0003-1572-7707)
- F. Murgas (ORCID: https://orcid.org/0000-0001-9087-1245)
- M. Dévora-Pajares
- Emmanuël Jehin (ORCID: https://orcid.org/0000-0001-8923-488X)
- D. Queloz (ORCID: https://orcid.org/0000-0002-3012-0316)
- Georgina Dransfield (ORCID: https://orcid.org/0000-0002-3937-630X)
- Adam J. Burgasser (ORCID: https://orcid.org/0000-0002-6523-9536)
- Sebastián Zúñiga-Fernández (ORCID: https://orcid.org/0000-0002-9350-830X)
- W. Fong (ORCID: https://orcid.org/0000-0003-0241-2757)
- X. Bonfıls (ORCID: https://orcid.org/0000-0001-9003-8894)
- P. P. Pedersen
- R. L. Smart (ORCID: https://orcid.org/0000-0002-4424-4766)
- Karen A. Collins (ORCID: https://orcid.org/0000-0001-6588-9574)
- Steve B. Howell (ORCID: https://orcid.org/0000-0002-2532-2853)
- A. H. M. J. Triaud (ORCID: https://orcid.org/0000-0002-5510-8751)
- Lisa Kaltenegger (ORCID: https://orcid.org/0000-0002-0436-1802)
- S. Seager
- Pamela Rowden (ORCID: https://orcid.org/0000-0002-4829-7101)
- Y. Gómez Maqueo Chew (ORCID: https://orcid.org/0000-0002-7486-6726)
- Z. Benkhaldoun (ORCID: https://orcid.org/0000-0001-6285-9847)
- Sean N. Raymond (ORCID: https://orcid.org/0000-0001-8974-0758)
- Richard P. Schwarz (ORCID: https://orcid.org/0000-0001-8227-1020)
- Mathilde Timmermans (ORCID: https://orcid.org/0009-0008-2214-5039)
- Nicholas M. Law (ORCID: https://orcid.org/0000-0001-9380-6457)
- Fatemeh Davoudi (ORCID: https://orcid.org/0000-0002-1787-3444)
- K. Horne (ORCID: https://orcid.org/0000-0003-1728-0304)
- Khalid Barkaoui (ORCID: https://orcid.org/0000-0003-1464-9276)
- G. Ricker (ORCID: https://orcid.org/0000-0003-2058-6662)
- Carl Ziegler (ORCID: https://orcid.org/0000-0002-0619-7639)
- M. J. Hooton (ORCID: https://orcid.org/0000-0003-0030-332X)
- L. Delrez (ORCID: https://orcid.org/0000-0001-6108-4808)
- Jessie L. Christiansen (ORCID: https://orcid.org/0000-0002-8035-4778)
- Stephanie Striegel (ORCID: https://orcid.org/0009-0008-5145-0446)
- Elsa Ducrot (ORCID: https://orcid.org/0000-0002-7008-6888)
- Brice-Olivier Demory (ORCID: https://orcid.org/0000-0002-9355-5165)
- R. Vanderspek (ORCID: https://orcid.org/0000-0001-6763-6562)
- Christian Aganze (ORCID: https://orcid.org/0000-0003-2094-9128)
- Keivan G. Stassun (ORCID: https://orcid.org/0000-0002-3481-9052)
- L. J. Garcia (ORCID: https://orcid.org/0000-0002-4296-2246)
- Emily Pass (ORCID: https://orcid.org/0000-0002-1533-9029)
- César Briceño (ORCID: https://orcid.org/0000-0001-7124-4094)
- Samantha Thompson (ORCID: https://orcid.org/0000-0002-8039-194X)
- J. M. Almenara
- Joshua N. Winn (ORCID: https://orcid.org/0000-0002-4265-047X)
- Gregor Srdoč
Institutions
- University of North Carolina at Chapel Hill (US)
Publication Details
- Journal
- UNC Libraries
- Published
- 2024-11-20
- DOI
- https://doi.org/10.17615/6rbk-by49
- Primary Topic
- Astro and Planetary Science
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- National Science Foundation
- National Aeronautics and Space Administration
- 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