HADES RV Programme with HARPS-N at TNG XIII. A sub-Neptune around the M dwarf GJ 720 A

Based on observations collected at the Italian Telescopio Nazionale Galileo (TNG), operated on the island of La Palma by the Fundación Galileo Galilei of the INAF (Istituto Nazionale di Astrofisica) at the Spanish Observatorio del Roque de los Muchachos of the Instituto de Astrofísica de Canarias, i...

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Autores: González Álvarez, E., Petralia, A., Micela, G., Maldonado, J., Affer, L., Maggio, A., Covino, E., Damasso, M., Lanza, A. F., Perger, M., Pinamonti, M., Poretti, E., Scandariato, G., Sozzetti, A., Bignamini, A., Giacobbe, P., Leto, G., Pagano, I., Zanmar Sánchez, R., González Hernández, J. I., Rebolo, R., Ribas, I., Suárez Mascareño, A., Toledo Padrón, B.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2021
País:España
Institución:Instituto Nacional de Técnica Aeroespacial (INTA)
Repositorio:DIGITAL.INTA Repositorio Digital del Instituto Nacional de Técnica Aeroespacial
OAI Identifier:oai:digital.inta.es:20.500.12666/556
Acceso en línea:https://www.aanda.org/articles/aa/abs/2021/05/aa40490-21/aa40490-21.html
http://hdl.handle.net/20.500.12666/556
Access Level:acceso abierto
Palabra clave:Stars: late type
Planetary systems
Stars: individual: GJ 720 A
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oai_identifier_str oai:digital.inta.es:20.500.12666/556
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network_name_str España
repository_id_str
dc.title.none.fl_str_mv HADES RV Programme with HARPS-N at TNG XIII. A sub-Neptune around the M dwarf GJ 720 A
title HADES RV Programme with HARPS-N at TNG XIII. A sub-Neptune around the M dwarf GJ 720 A
spellingShingle HADES RV Programme with HARPS-N at TNG XIII. A sub-Neptune around the M dwarf GJ 720 A
González Álvarez, E.
Stars: late type
Planetary systems
Stars: individual: GJ 720 A
title_short HADES RV Programme with HARPS-N at TNG XIII. A sub-Neptune around the M dwarf GJ 720 A
title_full HADES RV Programme with HARPS-N at TNG XIII. A sub-Neptune around the M dwarf GJ 720 A
title_fullStr HADES RV Programme with HARPS-N at TNG XIII. A sub-Neptune around the M dwarf GJ 720 A
title_full_unstemmed HADES RV Programme with HARPS-N at TNG XIII. A sub-Neptune around the M dwarf GJ 720 A
title_sort HADES RV Programme with HARPS-N at TNG XIII. A sub-Neptune around the M dwarf GJ 720 A
dc.creator.none.fl_str_mv González Álvarez, E.
Petralia, A.
Micela, G.
Maldonado, J.
Affer, L.
Maggio, A.
Covino, E.
Damasso, M.
Lanza, A. F.
Perger, M.
Pinamonti, M.
Poretti, E.
Scandariato, G.
Sozzetti, A.
Bignamini, A.
Giacobbe, P.
Leto, G.
Pagano, I.
Zanmar Sánchez, R.
González Hernández, J. I.
Rebolo, R.
Ribas, I.
Suárez Mascareño, A.
Toledo Padrón, B.
author González Álvarez, E.
author_facet González Álvarez, E.
Petralia, A.
Micela, G.
Maldonado, J.
Affer, L.
Maggio, A.
Covino, E.
Damasso, M.
Lanza, A. F.
Perger, M.
Pinamonti, M.
Poretti, E.
Scandariato, G.
Sozzetti, A.
Bignamini, A.
Giacobbe, P.
Leto, G.
Pagano, I.
Zanmar Sánchez, R.
González Hernández, J. I.
Rebolo, R.
Ribas, I.
Suárez Mascareño, A.
Toledo Padrón, B.
author_role author
author2 Petralia, A.
Micela, G.
Maldonado, J.
Affer, L.
Maggio, A.
Covino, E.
Damasso, M.
Lanza, A. F.
Perger, M.
Pinamonti, M.
Poretti, E.
Scandariato, G.
Sozzetti, A.
Bignamini, A.
Giacobbe, P.
Leto, G.
Pagano, I.
Zanmar Sánchez, R.
González Hernández, J. I.
Rebolo, R.
Ribas, I.
Suárez Mascareño, A.
Toledo Padrón, B.
author2_role author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Unidad de Excelencia Científica María de Maeztu Centro de Astrobiología del Instituto Nacional de Técnica Aeroespacial y CSIC, MDM-2017-0737
González Álvarez, E. [0000-0002-4820-2053]
Petralia, A. [0000-0002-9882-1020]
Maldonado, J. [0000-0002-2218-5689]
Affer, L. [0000-0001-5600-3778]
National Science Foundation (USA NSF)
Agenzia Spaziale Italiana (ASI)
Generalitat de Catalunya
Fundación Caixa
Agencia Estatal de Investigación (AEI)
dc.subject.none.fl_str_mv Stars: late type
Planetary systems
Stars: individual: GJ 720 A
topic Stars: late type
Planetary systems
Stars: individual: GJ 720 A
description Based on observations collected at the Italian Telescopio Nazionale Galileo (TNG), operated on the island of La Palma by the Fundación Galileo Galilei of the INAF (Istituto Nazionale di Astrofisica) at the Spanish Observatorio del Roque de los Muchachos of the Instituto de Astrofísica de Canarias, in the framework of the HArps-n red Dwarf Exoplanet Survey (HADES).
publishDate 2021
dc.date.none.fl_str_mv 2021
2022
2022
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://www.aanda.org/articles/aa/abs/2021/05/aa40490-21/aa40490-21.html
http://hdl.handle.net/20.500.12666/556
url https://www.aanda.org/articles/aa/abs/2021/05/aa40490-21/aa40490-21.html
http://hdl.handle.net/20.500.12666/556
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv ENTENDIENDO LA ESTRUCTURA INTERNA, LA EVOLUCION Y LA VARIABILIDAD DE ESTRELLAS DE BAJA MASA CON PLANETAS
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/AYA2016-79425-C3-1-P
EXPLOTACION CIENTIFICA DE CARMENES Y PREPARACION DE LOS PROXIMOS BUSCADORES DE EXOPLANETAS
ENANAS MARRONES Y PLANETAS AISLADOS Y COMO COMPAÑEROS DE ESTRELLAS
CONTRIBUCION DE LA UGR A LA MISION ESPACIAL PLATO2.0. FASES B2/C/D
ORIGEN Y EVOLUCION DE LAS ENANAS MARRONES Y PLANETAS GIGANTES
ESTRUCTURA, PROCESOS Y CLIMA DE LAS ATMOSFERAS DE LA TIERRA Y EXO-PLANETAS
ESPECTROSCOPIA DE ALTA RESOLUCION ORIENTADA AL ESTUDIO DE EXOTIERRAS Y LA FORMACION DE LA VIA LACTEA. EXPLOTACION CIENTIFICA DE ESPRESSO Y HORS
RYC-2013-14875
SEARCH AND CHARACTERIZATION OF EXOEARTHS: THE ROAD TO ARIEL
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/AYA2016-79425-C3-2-P
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/AYA2016-79425-C3-3-P
info:eu-repo/grantAgreement/MINECO//AYA2015-69350-C3-2-P
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/ESP2017-87676-C5-2-R
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/ESP2017-87143-R
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PGC2018-098153-B-C33
info:eu-repo/grantAgreement/MINECO//RYC-2013-14875
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/AYA2017-86389-P
dc.rights.none.fl_str_mv Attribution-NonCommercial-NoDerivatives 4.0 International
© ESO 2021
https://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Attribution-NonCommercial-NoDerivatives 4.0 International
© ESO 2021
https://creativecommons.org/licenses/by-nc-nd/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv EDP Sciences
publisher.none.fl_str_mv EDP Sciences
dc.source.none.fl_str_mv reponame:DIGITAL.INTA Repositorio Digital del Instituto Nacional de Técnica Aeroespacial
instname:Instituto Nacional de Técnica Aeroespacial (INTA)
instname_str Instituto Nacional de Técnica Aeroespacial (INTA)
reponame_str DIGITAL.INTA Repositorio Digital del Instituto Nacional de Técnica Aeroespacial
collection DIGITAL.INTA Repositorio Digital del Instituto Nacional de Técnica Aeroespacial
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spelling HADES RV Programme with HARPS-N at TNG XIII. A sub-Neptune around the M dwarf GJ 720 AGonzález Álvarez, E.Petralia, A.Micela, G.Maldonado, J.Affer, L.Maggio, A.Covino, E.Damasso, M.Lanza, A. F.Perger, M.Pinamonti, M.Poretti, E.Scandariato, G.Sozzetti, A.Bignamini, A.Giacobbe, P.Leto, G.Pagano, I.Zanmar Sánchez, R.González Hernández, J. I.Rebolo, R.Ribas, I.Suárez Mascareño, A.Toledo Padrón, B.Stars: late typePlanetary systemsStars: individual: GJ 720 ABased on observations collected at the Italian Telescopio Nazionale Galileo (TNG), operated on the island of La Palma by the Fundación Galileo Galilei of the INAF (Istituto Nazionale di Astrofisica) at the Spanish Observatorio del Roque de los Muchachos of the Instituto de Astrofísica de Canarias, in the framework of the HArps-n red Dwarf Exoplanet Survey (HADES).Context. The high number of super-Earth and Earth-like planets in the habitable zone detected around M-dwarf stars in recent years has revealed these stellar objects to be the key to planetary radial velocity (RV) searches. Aims. Using the HARPS-N spectrograph within The HArps-n red Dwarf Exoplanet Survey (HADES) we have reached the precision needed to detect small planets with a few Earth masses using the spectroscopic radial velocity technique. HADES is mainly focused on the M-dwarf population of the northern hemisphere. Methods. We obtained 138 HARPS-N RV measurements between 2013 May and 2020 September of GJ 720 A, classified as an M0.5 V star located at a distance of 15.56 pc. To characterize the stellar variability and to distinguish the periodic variation due to the Keplerian signals from those related to stellar activity, the HARPS-N spectroscopic activity indicators and the simultaneous photometric observations with the APACHE and EXORAP transit surveys were analyzed. We also took advantage of TESS, MEarth, and SuperWASP photometric surveys. The combined analysis of HARPS-N RVs and activity indicators let us address the nature of the periodic signals. The final model and the orbital planetary parameters were obtained by simultaneously fitting the stellar variability and the Keplerian signal using a Gaussian process regression and following a Bayesian criterion. Results. The HARPS-N RV periodic signals around 40 days and 100 days have counterparts at the same frequencies in HARPS-N activity indicators and photometric light curves. We thus attribute these periodicities to stellar activity; the first period is likely associated with the stellar rotation. GJ 720 A shows the most significant signal at 19.466 ± 0.005 days with no counterparts in any stellar activity indices. We hence ascribe this RV signal, having a semi-amplitude of 4.72 ± 0.27 m s−1, to the presence of a sub-Neptune mass planet. The planet GJ 720 Ab has a minimum mass of 13.64 ± 0.79 M⊕, it is in circular orbit at 0.119 ± 0.002 AU from its parent star, and lies inside the inner boundary of the habitable zone around its parent star.This research was supported by the Italian Ministry of Education, University, and Research through the PREMIALE WOW 2013 research project under grant Ricerca di pianeti intorno a stelle di piccola massa. This paper makes use of data from the MEarth Project, which is a collaboration between Harvard University and the Smithsonian Astrophysical Observatory. The MEarth Project acknowledges funding from the David and Lucile Packard Fellowship for Science and Engineering and the National Science Foundation under grants AST-0807690, AST-1109468, AST-1616624 and AST-1004488 (Alan T. Waterman Award), and a grant from the John Templeton Foundation. This work has made use of data from the European Space Agency (ESA) mission Gaia (https://www.cosmos.esa.int/gaia), processed by the Gaia Data Processing and Analysis Consortium (DPAC, https://www.cosmos.esa.int/web/gaia/dpac/consortium).Funding for the DPAC has been provided by national institutions, in particular the institutions participating in the Gaia Multilateral Agreement. E.G.A. acknowledge support from the Spanish Ministry for Science, Innovation, and Universities through projects AYA-2016-79425-C3-1/2/3-P, AYA2015-69350-C3-2-P, ESP2017-87676-C5-2-R, ESP2017-87143-R, and the Spanish State Research Agency (AEI) Project No. MDM-2017-0737 Unidad de Excelencia Maria de Maeztu-Centro de Astrobiologia (CAB, CSIC/INTA). A.P. acknowledges support from ASI-INAF agreement 2018-22-HH.0 Partecipazione alla fase B1 della missione ARIEL. We acknowledge support from the Accordo Attuativo ASI-INAF no. 2018.22.HH.O, Partecipazione alla fase B1 della missione Ariel (ref. G. Micela). A.S., M.Pi. acknowledge the financial contribution from the agreement ASI-INAF n.2018-16-HH.0. M.P., I.R. acknowledge support from the Spanish Ministry of Science and Innovation and the European Regional Development Fund through grant PGC2018-098153-B-C33, as well as the support of the Generalitat de Catalunya/CERCA programme. J.I.G.H. acknowledges financial support from Spanish MICINN under the 2013 Ramon y Cajal program RYC-2013-14875. A.S.M. acknowledges financial support from the Spanish Ministry of Science and Innovation (MICINN) under the 2019 Juan de la Cierva Programme. B.T.P. acknowledges Fundacion La Caixa for the financial support received in the form of a Ph.D. contract. J.I.G.H., R.R., A.S.M., B.T.P. acknowledge financial support from the Spanish MICINN AYA2017-86389-P.PeerreviewEDP SciencesUnidad de Excelencia Científica María de Maeztu Centro de Astrobiología del Instituto Nacional de Técnica Aeroespacial y CSIC, MDM-2017-0737González Álvarez, E. [0000-0002-4820-2053]Petralia, A. [0000-0002-9882-1020]Maldonado, J. [0000-0002-2218-5689]Affer, L. [0000-0001-5600-3778]National Science Foundation (USA NSF)Agenzia Spaziale Italiana (ASI)Generalitat de CatalunyaFundación CaixaAgencia Estatal de Investigación (AEI)202220222021info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501application/pdfhttps://www.aanda.org/articles/aa/abs/2021/05/aa40490-21/aa40490-21.htmlhttp://hdl.handle.net/20.500.12666/556reponame:DIGITAL.INTA Repositorio Digital del Instituto Nacional de Técnica Aeroespacialinstname:Instituto Nacional de Técnica Aeroespacial (INTA)InglésENTENDIENDO LA ESTRUCTURA INTERNA, LA EVOLUCION Y LA VARIABILIDAD DE ESTRELLAS DE BAJA MASA CON PLANETASinfo:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/AYA2016-79425-C3-1-PEXPLOTACION CIENTIFICA DE CARMENES Y PREPARACION DE LOS PROXIMOS BUSCADORES DE EXOPLANETASENANAS MARRONES Y PLANETAS AISLADOS Y COMO COMPAÑEROS DE ESTRELLASCONTRIBUCION DE LA UGR A LA MISION ESPACIAL PLATO2.0. FASES B2/C/DORIGEN Y EVOLUCION DE LAS ENANAS MARRONES Y PLANETAS GIGANTESESTRUCTURA, PROCESOS Y CLIMA DE LAS ATMOSFERAS DE LA TIERRA Y EXO-PLANETASESPECTROSCOPIA DE ALTA RESOLUCION ORIENTADA AL ESTUDIO DE EXOTIERRAS Y LA FORMACION DE LA VIA LACTEA. EXPLOTACION CIENTIFICA DE ESPRESSO Y HORSRYC-2013-14875SEARCH AND CHARACTERIZATION OF EXOEARTHS: THE ROAD TO ARIELinfo:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/AYA2016-79425-C3-2-Pinfo:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/AYA2016-79425-C3-3-Pinfo:eu-repo/grantAgreement/MINECO//AYA2015-69350-C3-2-Pinfo:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/ESP2017-87676-C5-2-Rinfo:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/ESP2017-87143-Rinfo:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PGC2018-098153-B-C33info:eu-repo/grantAgreement/MINECO//RYC-2013-14875info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/AYA2017-86389-PAttribution-NonCommercial-NoDerivatives 4.0 International© ESO 2021https://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessoai:digital.inta.es:20.500.12666/5562026-06-23T12:46:37Z
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