[en] We present the detection and validation of a small, temperate transiting exoplanet orbiting TOI-1080 every 3.9652482 d. The host is a quiet M4V star at 25.6 pc. The planet signal was first detected by the Transiting Exoplanet Survey Satellite (TESS) and validated using TESS and ground-based observations. By fitting the available light curves, the planet radius is measured to be 1.200 0.058 R and its equilibrium temperature of K. With Near Infra Red Planet Searcher (NIRPS) radial velocities, we are able to place a 3 upper limit on the mass of TOI-1080 b of 10.7 M. Our injection-recovery tests enable us to discard additional transiting planets in the TOI-1080 system with radii down to 0.9 R and periods between 0.5 and 7.7 d, and planets with radii larger than 1.4 R for periods up to 19 d. We demonstrate that it is highly amenable to characterization of its mass and putative atmosphere. In particular, we find that TOI-1080 b is an exceptional target for the ongoing JWST + HST Rocky Worlds DDT programme, having a priority score that is higher than four out of nine targets currently being investigated by the programme. TOI-1080 b can be added to the sample of nearby benchmark planets accessible for detailed study with JWST.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Gómez Maqueo Chew, Y.; UNAM, Institute of Astronomy
Dransfield, G.; University of Oxford, Department of Astrophysics, University of Oxford Magdalen College, University of Birmingham, School of Physics and Astronomy
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Cadieux, C.; University of Geneva, Astronomical Observatory, -
Ducrot, Elsa ; Université de Liège - ULiège > Département d'astrophysique, géophysique et océanographie (AGO) > Exoplanets in Transit: Identification and Characterization ; CEA Saclay, Service d'Astrophysique
Rackham, B. V.; MIT, Department of Earth and Planetary Science, MIT, Center for Space Research/Kavli Institute
Timmermans, Mathilde ; Université de Liège - ULiège > Département d'astrophysique, géophysique et océanographie (AGO) > Exoplanets in Transit: Identification and Characterization
Burgasser, A. J.; Department of Astronomy &, Astrophysics, UC San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA,
Segura, A.; Universidad Nacional Autónoma de México, Instituto de Ciencias Nucleares, Cto. Exterior S/N, C.U., Coyoacán, 04510 Ciudad de Mexico, México,
Stassun, K. G.; Vanderbilt University, Department of Physics and Astronomy
Ziegler, C.; Stephen F Austin State University, Texas
Almenara, J. M.; University of Geneva, Astronomical Observatory, Institute de Planetologie et d'Astrophysique de Grenoble
Demory, B. O.; University of Bern, Switzerland
Gillon, Michaël ; Université de Liège - ULiège > Département d'astrophysique, géophysique et océanographie (AGO)
Jenkins, J. M.; NASA Ames Research Center
Jofré, E.; Universidad Nacional de Córdoba ─ Observatorio Astronómico de Córdoba, Laprida 854, X5000BGR Córdoba, Argentina, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Godoy Cruz 2290, CPC 1425FQB CABA, Argentina
Khandelwal, Akanksha ; Université de Liège - ULiège > Département d'astrophysique, géophysique et océanographie (AGO) > Exoplanets in Transit: Identification and Characterization ; UNAM, Institute of Astronomy
Páez, S.; UNAM, Institute of Astronomy
Petrucci, R.; Universidad Nacional de Córdoba ─ Observatorio Astronómico de Córdoba, Laprida 854, X5000BGR Córdoba, Argentina, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Godoy Cruz 2290, CPC 1425FQB CABA, Argentina,
Parc, L.; University of Geneva, Astronomical Observatory
Pichardo Marcano, M.; UNAM, Institute of Astronomy
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Schroffenegger, U.; University of Bern, Switzerland
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Bonfils, X.; Institute de Planetologie et d'Astrophysique de Grenoble
Bouchy, F.; University of Geneva, Astronomical Observatory
Collins, K. A.; Harvard Smithsonian Center for Astrophysics
Doyon, R.; Institut Trottier de recherche sur les exoplanètes, Département de Physique, Université de Montréal, Montréal, Québec, H3C 3J7, Canada
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Pozuelos, F. J.; Institute of Astrophysics of Andalusia
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Yalçinkaya, Selçuk ; Université de Liège - ULiège > Département d'astrophysique, géophysique et océanographie (AGO) > Exoplanets in Transit: Identification and Characterization
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