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
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/51861
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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 Técnicas2025-09-29T09:33:54Zoai: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:34982025-09-29 09:33:55.071CONICET 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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1844613045990457344 |
score |
13.070432 |