Two sub-Neptunes around the M dwarf TOI-1470

González-Álvarez, E., et al.

Detalhes bibliográficos
Autores: González-Álvarez, E., Zapatero Osorio, María Rosa, Caballero, J. A., Cifuentes, C., Herrero Casas, Enrique, López González, Maria J., Rodríguez Martínez, Eloy, Rodríguez-López, Cristina, Sanz-Forcada, J., Tabernero, H. M., Amado, Pedro J., Ribas, Ignasi
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2023
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/352437
Acesso em linha:http://hdl.handle.net/10261/352437
Access Level:acceso abierto
Palavra-chave:Techniques: photometric
Techniques: radial velocities
Stars: individual: TOI-1470
Stars: late-type
Planetary systems
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dc.title.none.fl_str_mv Two sub-Neptunes around the M dwarf TOI-1470
title Two sub-Neptunes around the M dwarf TOI-1470
spellingShingle Two sub-Neptunes around the M dwarf TOI-1470
González-Álvarez, E.
Techniques: photometric
Techniques: radial velocities
Stars: individual: TOI-1470
Stars: late-type
Planetary systems
title_short Two sub-Neptunes around the M dwarf TOI-1470
title_full Two sub-Neptunes around the M dwarf TOI-1470
title_fullStr Two sub-Neptunes around the M dwarf TOI-1470
title_full_unstemmed Two sub-Neptunes around the M dwarf TOI-1470
title_sort Two sub-Neptunes around the M dwarf TOI-1470
dc.creator.none.fl_str_mv González-Álvarez, E.
Zapatero Osorio, María Rosa
Caballero, J. A.
Cifuentes, C.
Herrero Casas, Enrique
López González, Maria J.
Rodríguez Martínez, Eloy
Rodríguez-López, Cristina
Sanz-Forcada, J.
Tabernero, H. M.
Amado, Pedro J.
Ribas, Ignasi
author González-Álvarez, E.
author_facet González-Álvarez, E.
Zapatero Osorio, María Rosa
Caballero, J. A.
Cifuentes, C.
Herrero Casas, Enrique
López González, Maria J.
Rodríguez Martínez, Eloy
Rodríguez-López, Cristina
Sanz-Forcada, J.
Tabernero, H. M.
Amado, Pedro J.
Ribas, Ignasi
author_role author
author2 Zapatero Osorio, María Rosa
Caballero, J. A.
Cifuentes, C.
Herrero Casas, Enrique
López González, Maria J.
Rodríguez Martínez, Eloy
Rodríguez-López, Cristina
Sanz-Forcada, J.
Tabernero, H. M.
Amado, Pedro J.
Ribas, Ignasi
author2_role author
author
author
author
author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Ministerio de Ciencia e Innovación (España)
European Commission
Agencia Estatal de Investigación (España)
European Commission
Ministerio de Economía y Competitividad (España)
Ministerio de Ciencia, Innovación y Universidades (España)
Japan Society for the Promotion of Science
Generalitat de Catalunya
Junta de Andalucía
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Techniques: photometric
Techniques: radial velocities
Stars: individual: TOI-1470
Stars: late-type
Planetary systems
topic Techniques: photometric
Techniques: radial velocities
Stars: individual: TOI-1470
Stars: late-type
Planetary systems
description González-Álvarez, E., et al.
publishDate 2023
dc.date.none.fl_str_mv 2023
2024
2024
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dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/352437
url http://hdl.handle.net/10261/352437
dc.language.none.fl_str_mv Inglés
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dc.publisher.none.fl_str_mv EDP Sciences
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spelling Two sub-Neptunes around the M dwarf TOI-1470González-Álvarez, E.Zapatero Osorio, María RosaCaballero, J. A.Cifuentes, C.Herrero Casas, EnriqueLópez González, Maria J.Rodríguez Martínez, EloyRodríguez-López, CristinaSanz-Forcada, J.Tabernero, H. M.Amado, Pedro J.Ribas, IgnasiTechniques: photometricTechniques: radial velocitiesStars: individual: TOI-1470Stars: late-typePlanetary systemsGonzález-Álvarez, E., et al.[Aims] A transiting planet candidate with a sub-Neptune radius orbiting the nearby (d = 51.9 ± 0.07 pc) M1.5 V star TOI-1470 with a period of ~2.5 d was announced by the NASA Transiting Exoplanet Survey Satellite (TESS), which observed the field of TOI-1470 in four different sectors. We aim to validate its planetary nature using precise radial velocities (RVs) taken with the CARMENES spectrograph.[Methods] We obtained 44 RV measurements with CARMENES spanning eight months between 3 June 2020 and 17 January 2021. For a better characterization of the parent star activity, we also collected contemporaneous optical photometric observations at the Joan Oró and Sierra Nevada Observatories, and we retrieved archival photometry from the literature. We used ground-based photometric observations from MuSCAT and also from MuSCAT2 and MuSCAT3 to confirm the planetary transit signals. We performed a combined photometric and spectroscopic analysis by including Gaussian processes and Keplerian orbits to simultaneously account for the stellar activity and planetary signals.[Results] We estimate that TOI-1470 has a rotation period of 29 ± 3d based on photometric and spectroscopic data. The combined analysis confirms the discovery of the announced transiting planet, TOI-1470 b, with an orbital period of 2.527093 ± 0.000003 d, a mass of 7.32-1.24+1.21M⊕, and a radius of 2.18-0.04+0.04R⊕. We also discover a second transiting planet that was not announced previously by TESS, TOI-1470 c, with an orbital period of 18.08816 ± 0.00006 d, a mass of 7.24-2.77+2.87M⊕, and a radius of 2.47-0.02+0.02R⊕ . The two planets are placed on the same side of the radius valley of M dwarfs and lie between TOI-1470 and the inner border of its habitable zone.We acknowledge financial support from the Agencia Estatal de Investigación (AEI/10.13039/501100011033) of the Ministerio de Ciencia e Innovación and the ERDF “A way of making Europe” through projects PID2019-109522GB-C5[1:4], PID2019-107061GB-C64, and PID2019-110689RB-100, and the Centre of Excellence “Severo Ochoa” and “María de Maeztu” awards to the Instituto de Astrofísica de Canarias (CEX2019-000920-S), Instituto de Astrofísica de Andalucía (SEV-2017-0709), and Centro de Astrobiología (MDM-2017-0737); the Generalitat de Catalunya/CERCA programme; MEXT/JSPS KAKENHI through grants 15H02063, JP17H04574, JP18H05439, JP18H05442, JP20J21872, JP21K20376, and 22000005; and JST CREST through grant JPMJCR1761.With funding from the Spanish government through the "Severo Ochoa Centre of Excellence" accreditation (CEX2019-000920-S).Peer reviewedEDP SciencesMinisterio de Ciencia e Innovación (España)European CommissionAgencia Estatal de Investigación (España)European CommissionMinisterio de Economía y Competitividad (España)Ministerio de Ciencia, Innovación y Universidades (España)Japan Society for the Promotion of ScienceGeneralitat de CatalunyaJunta de AndalucíaConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202420242023info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/352437reponame:DIGITAL.CSIC. 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