Year: 2025
Type: article
Abstract: Context. One of the goals of the ESPRESSO guaranteed time observations (GTOs) at the ESO 8.2 m telescope is to follow up on candidate planets from transit surveys such as the TESS mission. High-precision radial velocities are required to characterize small exoplanets. Aims. We intend to confirm the existence of a transiting super-Earth around the bright (V=9.74) K0-type star TOI-512 (TIC 119292328) and provide a characterization. Methods. Combining photometric data from TESS and 37 high-resolution spectroscopic observations from ESPRESSO in a joint Markov chain Monte Carlo analysis, we determined the planetary parameters of TOI-512b and characterized its internal structure. Results. We find that TOI-512b is a super-Earth, with a radius of 1.54 ± 0.10 R⊕ and mass of 3.57−0.55+0.53 M⊕, on a 7.19−6.1·10−5+7.10−5 day orbit. This corresponds to a bulk density of 5.62−1.28+1.59 g cm−3. Our interior structure analysis presents a small inner core representing 0.13−0.11+0.13 of the solid mass fraction for the planet, surrounded by a mantle with a mass fraction of 0.69−0.22+0.20, and an upper limit of the water layer of 0.16. The gas mass below 10−8.93 indicates a very small amount of gas on the planet. We find no evidence of the second candidate found by the TESS pipeline, TOI-512.02, neither in TESS photometry, nor in the ESPRESSO radial velocities. The low stellar activity makes it an interesting transmission spectroscopy candidate for future-generation instruments.
Authors: J. Rodrigues, S. C. C. Barros, N. C. Santos, J. Davoult, M. Attia, A. Castro-González, S. G. Sousa, O. D. S. Demangeon, M. J. Hobson, D. Bossini, C. Ziegler, J. P. Faria, V. Adibekyan, C. Lovis, B. Lavie, M. Damasso, A. M. Silva, A. Suárez Mascareño, F. Pepe, F. Bouchy, Y. Alibert, J. I. González Hernández, A. Sozzetti, C. Allende Prieto, S. Cristiani, E. Palle, V. D’Odorico, D. Ehrenreich, P. Figueira, K. G. Stassun, R. Génova Santos, G. Lo Curto, C. J. A. P. Martins, A. Mehner, G. Micela, P. Molaro, N. J. Nunes, E. Poretti, R. Rebolo, S. Udry, M. R. Zapatero Osorio
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, California Institute of Technology, Ministerio de Ciencia, Innovación y Universidades, European Space Agency, European Commission, Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung, Ministerio de Ciencia e Innovación, Fundação para a Ciência e a Tecnologia, European Regional Development Fund, Agencia Estatal de Investigación
Awards: G1037624341, G1105844351, G1129048233, G1175115578, G121809054, G1297482482, G132494354, G1440137623, G1516249645, G1516346500, G1594096898, G1622782223, G1664827575, G1763632427, G1855990336, Exploring exoplanets with cutting-edge spectroscopy, G19485122, G210041235, G2166381293, G2262748287, G2309174360, G2353446196, Resolvendo alguns dos mais antigos problemas em evolução estelar com fotometria ultra-precisa obtida a partir de satélites, G2452073530, G2469010403, Le problème de l'intuition., G2601397997, G2650114919, G2657530899, G2660406951, G2673512141, G274581676, G2761687731, G279363373, Optical Infrared Coordination Network for Astronomy, G300979063, G308504231, G3132380729, G3161872288, Instituto de Astrofísica e Ciências do Espaço, G317434862, G3274060861, Instituto de Astrofísica e Ciências do Espaço, G3361828444, G34346518, G3480869486, G3518538256, Exploring exoplanets with cutting-edge spectroscopy, G3634519657, G3681454997, G3690828678, G3696820176, Beyond Lambda: Astrophysical probes of fundamental physics, G3840324753, G3854721332, G3891694003, G3967954984, G4042783231, G4046065984, G410571670, G4192228184, G425668148, G4276578120, Exploring exoplanets with cutting-edge spectroscopy, G430777504, G4368644042, G4430112794, G4442677895, G4484233699, G451917667, G4526231891, G47113965, G4724859719, G491712853, G491858407, Phénomènes de transport et propriétés électroniques des métaux et des supraconducteurs, G5080475149, Exploring exoplanets with cutting-edge spectroscopy, G5195188938, G5224927334, ROBot and SENSors INtegration as Guidance FOR Enhanced Computer Assisted Surgery and Therapy, G526596183, G5376563997, G5378563076, G5385376234, G5404395142, G5421974903, G5454278309, G5499322367, G5539308778, G5555131222, G5635532810, G5677667711, G5805502524, A Geração de Espectrógrafos para encontrar uma nova Terra, G5926292605, G5967599077, Wissenschaftliche Korrespondenz von Wolfgang Pauli, Band IV : 1950-1958, G6103259537, G6125752356, G624877701, Cosmologia e Física Fundamental com o ESPRESSO, G6731524417, G6798070355, NCCR PlanetS: Origin, evolution and characterisation of planets, G6997658380, Instituto de Astrofísica e Ciências do Espaço, G7084143925, G7123698595, Explorando exoPlanetas com o CHEOPS, G7249295867, G7554324364, VLSI-Systeme mit optischen Verbindungen - Vorstudie der technologischen Machbarkeit -, G7805626310, G7849210366, G7863371703, G7965899483, G8298805090, G830901801, G8318038168, Characterization of the expression of Retinoic acid receptor during early chick development, G8497050386, G8505061131, G8684520763, Modelos de actividade estelar para deteção de exoplanetas, G8920660035, G897484643, Exploring exoplanets with cutting-edge spectroscopy, G929308097, G967088233, G99296377
OpenAlex ID: W6959465171
FWCI:
Cites:
Cited by:
Related to: