The HARPS search for southern extra-solar planets: XLII. A system of Earth-mass planets around the nearby M dwarf YZ Ceti

Autores
Astudillo-Defru, N.; Diaz, Rodrigo Fernando; Bonfils, X.; Almenara, J. M.; Delisle, J. B.; Bouchy, F.; Delfosse, X.; Forveille, T.; Lovis, C.; Mayor, M.; Murgas, F.; Pepe, F.; Santos, N. C.; Ségransan, D.; Udry, S.; Wünsche, A.
Año de publicación
2017
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Exoplanet surveys have shown that systems with multiple low-mass planets on compact orbits are common. Except for a few cases, however, the masses of these planets are generally unknown. At the very end of the main sequence, host stars have the lowest mass and hence offer the largest reflect motion for a given planet. In this context, we monitored the low-mass (0.13 MȮ) M dwarf YZ Cet (GJ 54.1, HIP 5643) intensively and obtained radial velocities and stellar-activity indicators derived from spectroscopy and photometry, respectively. We find strong evidence that it is orbited by at least three planets in compact orbits (POrb = 1.97, 3.06, 4.66 days), with the inner two near a 2:3 mean-motion resonance. The minimum masses are comparable to the mass of Earth (M sin i = 0.75 ± 0.13, 0.98 ± 0.14, and 1.14 ± 0.17 MO±), and they are also the lowest masses measured by radial velocity so far. We note the possibility for a fourth planet with an even lower mass of M sin i = 0.472 ± 0.096 MO± at POrb = 1.04 days. An n-body dynamical model is used to place further constraints on the system parameters. At 3.6 parsecs, YZ Cet is the nearest multi-planet system detected to date.
Fil: Astudillo-Defru, N.. Universidad de Ginebra; Suiza
Fil: Diaz, Rodrigo Fernando. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina. Universidad de Buenos Aires; Argentina
Fil: Bonfils, X.. Universite Grenoble Alpes; Suiza
Fil: Almenara, J. M.. Universidad de Ginebra; Suiza
Fil: Delisle, J. B.. Universidad de Ginebra; Suiza
Fil: Bouchy, F.. Universidad de Ginebra; Suiza
Fil: Delfosse, X.. Universite Grenoble Alpes; Suiza
Fil: Forveille, T.. Universite Grenoble Alpes; Suiza
Fil: Lovis, C.. Universidad de Ginebra; Suiza
Fil: Mayor, M.. Universidad de Ginebra; Suiza
Fil: Murgas, F.. Instituto Astrofisico de Canarias; España
Fil: Pepe, F.. Universidad de Ginebra; Suiza
Fil: Santos, N. C.. Universidade Do Porto, Centro de Astrofisica; Portugal. Universidad de Porto; Portugal
Fil: Ségransan, D.. Universidad de Ginebra; Suiza
Fil: Udry, S.. Universidad de Ginebra; Suiza
Fil: Wünsche, A.. Universite Grenoble Alpes; Suiza
Materia
PLANETARY SYSTEMS
STARS: INDIVIDUAL: YZ CET
STARS: LATE-TYPE
TECHNIQUES: RADIAL VELOCITIES
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/51861
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/51861
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling The HARPS search for southern extra-solar planets: XLII. A system of Earth-mass planets around the nearby M dwarf YZ CetiAstudillo-Defru, N.Diaz, Rodrigo FernandoBonfils, X.Almenara, J. M.Delisle, J. B.Bouchy, F.Delfosse, X.Forveille, T.Lovis, C.Mayor, M.Murgas, F.Pepe, F.Santos, N. C.Ségransan, D.Udry, S.Wünsche, A.PLANETARY SYSTEMSSTARS: INDIVIDUAL: YZ CETSTARS: LATE-TYPETECHNIQUES: RADIAL VELOCITIEShttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1Exoplanet surveys have shown that systems with multiple low-mass planets on compact orbits are common. Except for a few cases, however, the masses of these planets are generally unknown. At the very end of the main sequence, host stars have the lowest mass and hence offer the largest reflect motion for a given planet. In this context, we monitored the low-mass (0.13 MȮ) M dwarf YZ Cet (GJ 54.1, HIP 5643) intensively and obtained radial velocities and stellar-activity indicators derived from spectroscopy and photometry, respectively. We find strong evidence that it is orbited by at least three planets in compact orbits (POrb = 1.97, 3.06, 4.66 days), with the inner two near a 2:3 mean-motion resonance. The minimum masses are comparable to the mass of Earth (M sin i = 0.75 ± 0.13, 0.98 ± 0.14, and 1.14 ± 0.17 MO±), and they are also the lowest masses measured by radial velocity so far. We note the possibility for a fourth planet with an even lower mass of M sin i = 0.472 ± 0.096 MO± at POrb = 1.04 days. An n-body dynamical model is used to place further constraints on the system parameters. At 3.6 parsecs, YZ Cet is the nearest multi-planet system detected to date.Fil: Astudillo-Defru, N.. Universidad de Ginebra; SuizaFil: Diaz, Rodrigo Fernando. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina. Universidad de Buenos Aires; ArgentinaFil: Bonfils, X.. Universite Grenoble Alpes; SuizaFil: Almenara, J. M.. Universidad de Ginebra; SuizaFil: Delisle, J. B.. Universidad de Ginebra; SuizaFil: Bouchy, F.. Universidad de Ginebra; SuizaFil: Delfosse, X.. Universite Grenoble Alpes; SuizaFil: Forveille, T.. Universite Grenoble Alpes; SuizaFil: Lovis, C.. Universidad de Ginebra; SuizaFil: Mayor, M.. Universidad de Ginebra; SuizaFil: Murgas, F.. Instituto Astrofisico de Canarias; EspañaFil: Pepe, F.. Universidad de Ginebra; SuizaFil: Santos, N. C.. Universidade Do Porto, Centro de Astrofisica; Portugal. Universidad de Porto; PortugalFil: Ségransan, D.. Universidad de Ginebra; SuizaFil: Udry, S.. Universidad de Ginebra; SuizaFil: Wünsche, A.. Universite Grenoble Alpes; SuizaEDP Sciences2017-09info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/51861Astudillo-Defru, N.; Diaz, Rodrigo Fernando; Bonfils, X.; Almenara, J. M.; Delisle, J. B.; et al.; The HARPS search for southern extra-solar planets: XLII. A system of Earth-mass planets around the nearby M dwarf YZ Ceti; EDP Sciences; Astronomy and Astrophysics; 605; L11; 9-20170004-6361CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://www.aanda.org/10.1051/0004-6361/201731581info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/201731581info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:01:57Zoai:ri.conicet.gov.ar:11336/51861instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-10-22 11:01:57.622CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv The HARPS search for southern extra-solar planets: XLII. A system of Earth-mass planets around the nearby M dwarf YZ Ceti
title The HARPS search for southern extra-solar planets: XLII. A system of Earth-mass planets around the nearby M dwarf YZ Ceti
spellingShingle The HARPS search for southern extra-solar planets: XLII. A system of Earth-mass planets around the nearby M dwarf YZ Ceti
Astudillo-Defru, N.
PLANETARY SYSTEMS
STARS: INDIVIDUAL: YZ CET
STARS: LATE-TYPE
TECHNIQUES: RADIAL VELOCITIES
title_short The HARPS search for southern extra-solar planets: XLII. A system of Earth-mass planets around the nearby M dwarf YZ Ceti
title_full The HARPS search for southern extra-solar planets: XLII. A system of Earth-mass planets around the nearby M dwarf YZ Ceti
title_fullStr The HARPS search for southern extra-solar planets: XLII. A system of Earth-mass planets around the nearby M dwarf YZ Ceti
title_full_unstemmed The HARPS search for southern extra-solar planets: XLII. A system of Earth-mass planets around the nearby M dwarf YZ Ceti
title_sort The HARPS search for southern extra-solar planets: XLII. A system of Earth-mass planets around the nearby M dwarf YZ Ceti
dc.creator.none.fl_str_mv Astudillo-Defru, N.
Diaz, Rodrigo Fernando
Bonfils, X.
Almenara, J. M.
Delisle, J. B.
Bouchy, F.
Delfosse, X.
Forveille, T.
Lovis, C.
Mayor, M.
Murgas, F.
Pepe, F.
Santos, N. C.
Ségransan, D.
Udry, S.
Wünsche, A.
author Astudillo-Defru, N.
author_facet Astudillo-Defru, N.
Diaz, Rodrigo Fernando
Bonfils, X.
Almenara, J. M.
Delisle, J. B.
Bouchy, F.
Delfosse, X.
Forveille, T.
Lovis, C.
Mayor, M.
Murgas, F.
Pepe, F.
Santos, N. C.
Ségransan, D.
Udry, S.
Wünsche, A.
author_role author
author2 Diaz, Rodrigo Fernando
Bonfils, X.
Almenara, J. M.
Delisle, J. B.
Bouchy, F.
Delfosse, X.
Forveille, T.
Lovis, C.
Mayor, M.
Murgas, F.
Pepe, F.
Santos, N. C.
Ségransan, D.
Udry, S.
Wünsche, A.
author2_role author
author
author
author
author
author
author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv PLANETARY SYSTEMS
STARS: INDIVIDUAL: YZ CET
STARS: LATE-TYPE
TECHNIQUES: RADIAL VELOCITIES
topic PLANETARY SYSTEMS
STARS: INDIVIDUAL: YZ CET
STARS: LATE-TYPE
TECHNIQUES: RADIAL VELOCITIES
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Exoplanet surveys have shown that systems with multiple low-mass planets on compact orbits are common. Except for a few cases, however, the masses of these planets are generally unknown. At the very end of the main sequence, host stars have the lowest mass and hence offer the largest reflect motion for a given planet. In this context, we monitored the low-mass (0.13 MȮ) M dwarf YZ Cet (GJ 54.1, HIP 5643) intensively and obtained radial velocities and stellar-activity indicators derived from spectroscopy and photometry, respectively. We find strong evidence that it is orbited by at least three planets in compact orbits (POrb = 1.97, 3.06, 4.66 days), with the inner two near a 2:3 mean-motion resonance. The minimum masses are comparable to the mass of Earth (M sin i = 0.75 ± 0.13, 0.98 ± 0.14, and 1.14 ± 0.17 MO±), and they are also the lowest masses measured by radial velocity so far. We note the possibility for a fourth planet with an even lower mass of M sin i = 0.472 ± 0.096 MO± at POrb = 1.04 days. An n-body dynamical model is used to place further constraints on the system parameters. At 3.6 parsecs, YZ Cet is the nearest multi-planet system detected to date.
Fil: Astudillo-Defru, N.. Universidad de Ginebra; Suiza
Fil: Diaz, Rodrigo Fernando. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina. Universidad de Buenos Aires; Argentina
Fil: Bonfils, X.. Universite Grenoble Alpes; Suiza
Fil: Almenara, J. M.. Universidad de Ginebra; Suiza
Fil: Delisle, J. B.. Universidad de Ginebra; Suiza
Fil: Bouchy, F.. Universidad de Ginebra; Suiza
Fil: Delfosse, X.. Universite Grenoble Alpes; Suiza
Fil: Forveille, T.. Universite Grenoble Alpes; Suiza
Fil: Lovis, C.. Universidad de Ginebra; Suiza
Fil: Mayor, M.. Universidad de Ginebra; Suiza
Fil: Murgas, F.. Instituto Astrofisico de Canarias; España
Fil: Pepe, F.. Universidad de Ginebra; Suiza
Fil: Santos, N. C.. Universidade Do Porto, Centro de Astrofisica; Portugal. Universidad de Porto; Portugal
Fil: Ségransan, D.. Universidad de Ginebra; Suiza
Fil: Udry, S.. Universidad de Ginebra; Suiza
Fil: Wünsche, A.. Universite Grenoble Alpes; Suiza
description Exoplanet surveys have shown that systems with multiple low-mass planets on compact orbits are common. Except for a few cases, however, the masses of these planets are generally unknown. At the very end of the main sequence, host stars have the lowest mass and hence offer the largest reflect motion for a given planet. In this context, we monitored the low-mass (0.13 MȮ) M dwarf YZ Cet (GJ 54.1, HIP 5643) intensively and obtained radial velocities and stellar-activity indicators derived from spectroscopy and photometry, respectively. We find strong evidence that it is orbited by at least three planets in compact orbits (POrb = 1.97, 3.06, 4.66 days), with the inner two near a 2:3 mean-motion resonance. The minimum masses are comparable to the mass of Earth (M sin i = 0.75 ± 0.13, 0.98 ± 0.14, and 1.14 ± 0.17 MO±), and they are also the lowest masses measured by radial velocity so far. We note the possibility for a fourth planet with an even lower mass of M sin i = 0.472 ± 0.096 MO± at POrb = 1.04 days. An n-body dynamical model is used to place further constraints on the system parameters. At 3.6 parsecs, YZ Cet is the nearest multi-planet system detected to date.
publishDate 2017
dc.date.none.fl_str_mv 2017-09
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/51861
Astudillo-Defru, N.; Diaz, Rodrigo Fernando; Bonfils, X.; Almenara, J. M.; Delisle, J. B.; et al.; The HARPS search for southern extra-solar planets: XLII. A system of Earth-mass planets around the nearby M dwarf YZ Ceti; EDP Sciences; Astronomy and Astrophysics; 605; L11; 9-2017
0004-6361
CONICET Digital
CONICET
url http://hdl.handle.net/11336/51861
identifier_str_mv Astudillo-Defru, N.; Diaz, Rodrigo Fernando; Bonfils, X.; Almenara, J. M.; Delisle, J. B.; et al.; The HARPS search for southern extra-solar planets: XLII. A system of Earth-mass planets around the nearby M dwarf YZ Ceti; EDP Sciences; Astronomy and Astrophysics; 605; L11; 9-2017
0004-6361
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://www.aanda.org/10.1051/0004-6361/201731581
info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/201731581
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv EDP Sciences
publisher.none.fl_str_mv EDP Sciences
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 12.982451

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