A temperate exo-Earth around a quiet M dwarf at 3.4 parsec

Autores
Bonfils, X.; Astudillo Defru, Nicola; Diaz, Rodrigo Fernando; Almenara, J.-M.; Forveille, T.; Bouchy, F.; Delfosse, X.; Lovis, C.; Mayor, M.; Murgas, F.; Pepe, F.; Santos, N.C.; Ségransan, D.; Udry, S.; Wünsche, A.
Año de publicación
2018
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The combination of high-contrast imaging and high-dispersion spectroscopy, which has successfully been use to detect the atmosphere of a giant planet, is one of the most promising potential probes of the atmosphere of Earth-size worlds. The forthcoming generation of extremely large telescopes (ELTs) may obtain sufficient contrast with this technique to detect O2 in the atmosphere of those worlds that orbit low-mass M dwarfs. This is strong motivation to carry out a census of planets around cool stars for which habitable zones can be resolved by ELTs, i.e. for M dwarfs within ~5 parsec. Our HARPS survey has been a major contributor to that sample of nearby planets. Here we report on our radial velocity observations of Ross 128 (Proxima Virginis, GJ447, HIP 57548), an M4 dwarf just 3.4 parsec away from our Sun. This source hosts an exo-Earth with a projected mass m sini = 1.35 M and an orbital period of 9.9 days. Ross 128 b receives less than 1.5 times as much flux as Earth from the Sun and its equilibrium ranges in temperature between 269 K for an Earth-like albedo and 213 K for a Venus-like albedo. Recent studies place it close to the inner edge of the conventional habitable zone. An 80-day long light curve from K2 campaign C01 demonstrates that Ross 128 b does not transit. Together with the All Sky Automated Survey (ASAS) photometry and spectroscopic activity indices, the K2 photometry shows that Ross 128 rotates slowly and has weak magnetic activity. In a habitability context, this makes survival of its atmosphere against erosion more likely. Ross 128 b is the second closest known exo-Earth, after Proxima Centauri b (1.3 parsec), and the closest temperate planet known around a quiet star. The 15 mas planet-star angular separation at maximum elongation will be resolved by ELTs (>3λD) in the optical bands of O2.
Fil: Bonfils, X.. Universite Grenoble Alpes; Francia
Fil: Astudillo Defru, Nicola. 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: Almenara, J.-M.. Universidad de Ginebra; Suiza
Fil: Forveille, T.. Universite Grenoble Alpes; Francia
Fil: Bouchy, F.. Universidad de Ginebra; Suiza
Fil: Delfosse, X.. Universite Grenoble Alpes; Francia
Fil: Lovis, C.. Universidad de Ginebra; Suiza
Fil: Mayor, M.. Universidad de Ginebra; Suiza
Fil: Murgas, F.. Instituto Astrofisico de Canarias; España. Universidad de La Laguna; España
Fil: Pepe, F.. Universidad de Ginebra; Suiza
Fil: Santos, N.C.. Universidad de Porto; Portugal
Fil: Ségransan, D.. Universidad de Ginebra; Suiza
Fil: Udry, S.. Universidad de Ginebra; Suiza
Fil: Wünsche, A.. Universite Grenoble Alpes; Francia
Materia
PLANETARY SYSTEMS
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:11336/209352
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/209352
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling A temperate exo-Earth around a quiet M dwarf at 3.4 parsecBonfils, X.Astudillo Defru, NicolaDiaz, Rodrigo FernandoAlmenara, J.-M.Forveille, T.Bouchy, F.Delfosse, X.Lovis, C.Mayor, M.Murgas, F.Pepe, F.Santos, N.C.Ségransan, D.Udry, S.Wünsche, A.PLANETARY SYSTEMSSTARS: LATE-TYPETECHNIQUES: RADIAL VELOCITIEShttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1The combination of high-contrast imaging and high-dispersion spectroscopy, which has successfully been use to detect the atmosphere of a giant planet, is one of the most promising potential probes of the atmosphere of Earth-size worlds. The forthcoming generation of extremely large telescopes (ELTs) may obtain sufficient contrast with this technique to detect O2 in the atmosphere of those worlds that orbit low-mass M dwarfs. This is strong motivation to carry out a census of planets around cool stars for which habitable zones can be resolved by ELTs, i.e. for M dwarfs within ~5 parsec. Our HARPS survey has been a major contributor to that sample of nearby planets. Here we report on our radial velocity observations of Ross 128 (Proxima Virginis, GJ447, HIP 57548), an M4 dwarf just 3.4 parsec away from our Sun. This source hosts an exo-Earth with a projected mass m sini = 1.35 M and an orbital period of 9.9 days. Ross 128 b receives less than 1.5 times as much flux as Earth from the Sun and its equilibrium ranges in temperature between 269 K for an Earth-like albedo and 213 K for a Venus-like albedo. Recent studies place it close to the inner edge of the conventional habitable zone. An 80-day long light curve from K2 campaign C01 demonstrates that Ross 128 b does not transit. Together with the All Sky Automated Survey (ASAS) photometry and spectroscopic activity indices, the K2 photometry shows that Ross 128 rotates slowly and has weak magnetic activity. In a habitability context, this makes survival of its atmosphere against erosion more likely. Ross 128 b is the second closest known exo-Earth, after Proxima Centauri b (1.3 parsec), and the closest temperate planet known around a quiet star. The 15 mas planet-star angular separation at maximum elongation will be resolved by ELTs (>3λD) in the optical bands of O2.Fil: Bonfils, X.. Universite Grenoble Alpes; FranciaFil: Astudillo Defru, Nicola. 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: Almenara, J.-M.. Universidad de Ginebra; SuizaFil: Forveille, T.. Universite Grenoble Alpes; FranciaFil: Bouchy, F.. Universidad de Ginebra; SuizaFil: Delfosse, X.. Universite Grenoble Alpes; FranciaFil: Lovis, C.. Universidad de Ginebra; SuizaFil: Mayor, M.. Universidad de Ginebra; SuizaFil: Murgas, F.. Instituto Astrofisico de Canarias; España. Universidad de La Laguna; EspañaFil: Pepe, F.. Universidad de Ginebra; SuizaFil: Santos, N.C.. Universidad de Porto; PortugalFil: Ségransan, D.. Universidad de Ginebra; SuizaFil: Udry, S.. Universidad de Ginebra; SuizaFil: Wünsche, A.. Universite Grenoble Alpes; FranciaEDP Sciences2018-05info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/209352Bonfils, X.; Astudillo Defru, Nicola; Diaz, Rodrigo Fernando; Almenara, J.-M.; Forveille, T.; et al.; A temperate exo-Earth around a quiet M dwarf at 3.4 parsec; EDP Sciences; Astronomy and Astrophysics; 613; A25; 5-2018; 1-90004-6361CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/201731973info:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/articles/aa/full_html/2018/05/aa31973-17/aa31973-17.htmlinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:43:01Zoai:ri.conicet.gov.ar:11336/209352instacron: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 09:43:01.578CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv A temperate exo-Earth around a quiet M dwarf at 3.4 parsec
title A temperate exo-Earth around a quiet M dwarf at 3.4 parsec
spellingShingle A temperate exo-Earth around a quiet M dwarf at 3.4 parsec
Bonfils, X.
PLANETARY SYSTEMS
STARS: LATE-TYPE
TECHNIQUES: RADIAL VELOCITIES
title_short A temperate exo-Earth around a quiet M dwarf at 3.4 parsec
title_full A temperate exo-Earth around a quiet M dwarf at 3.4 parsec
title_fullStr A temperate exo-Earth around a quiet M dwarf at 3.4 parsec
title_full_unstemmed A temperate exo-Earth around a quiet M dwarf at 3.4 parsec
title_sort A temperate exo-Earth around a quiet M dwarf at 3.4 parsec
dc.creator.none.fl_str_mv Bonfils, X.
Astudillo Defru, Nicola
Diaz, Rodrigo Fernando
Almenara, J.-M.
Forveille, T.
Bouchy, F.
Delfosse, X.
Lovis, C.
Mayor, M.
Murgas, F.
Pepe, F.
Santos, N.C.
Ségransan, D.
Udry, S.
Wünsche, A.
author Bonfils, X.
author_facet Bonfils, X.
Astudillo Defru, Nicola
Diaz, Rodrigo Fernando
Almenara, J.-M.
Forveille, T.
Bouchy, F.
Delfosse, X.
Lovis, C.
Mayor, M.
Murgas, F.
Pepe, F.
Santos, N.C.
Ségransan, D.
Udry, S.
Wünsche, A.
author_role author
author2 Astudillo Defru, Nicola
Diaz, Rodrigo Fernando
Almenara, J.-M.
Forveille, T.
Bouchy, F.
Delfosse, X.
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
dc.subject.none.fl_str_mv PLANETARY SYSTEMS
STARS: LATE-TYPE
TECHNIQUES: RADIAL VELOCITIES
topic PLANETARY SYSTEMS
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 The combination of high-contrast imaging and high-dispersion spectroscopy, which has successfully been use to detect the atmosphere of a giant planet, is one of the most promising potential probes of the atmosphere of Earth-size worlds. The forthcoming generation of extremely large telescopes (ELTs) may obtain sufficient contrast with this technique to detect O2 in the atmosphere of those worlds that orbit low-mass M dwarfs. This is strong motivation to carry out a census of planets around cool stars for which habitable zones can be resolved by ELTs, i.e. for M dwarfs within ~5 parsec. Our HARPS survey has been a major contributor to that sample of nearby planets. Here we report on our radial velocity observations of Ross 128 (Proxima Virginis, GJ447, HIP 57548), an M4 dwarf just 3.4 parsec away from our Sun. This source hosts an exo-Earth with a projected mass m sini = 1.35 M and an orbital period of 9.9 days. Ross 128 b receives less than 1.5 times as much flux as Earth from the Sun and its equilibrium ranges in temperature between 269 K for an Earth-like albedo and 213 K for a Venus-like albedo. Recent studies place it close to the inner edge of the conventional habitable zone. An 80-day long light curve from K2 campaign C01 demonstrates that Ross 128 b does not transit. Together with the All Sky Automated Survey (ASAS) photometry and spectroscopic activity indices, the K2 photometry shows that Ross 128 rotates slowly and has weak magnetic activity. In a habitability context, this makes survival of its atmosphere against erosion more likely. Ross 128 b is the second closest known exo-Earth, after Proxima Centauri b (1.3 parsec), and the closest temperate planet known around a quiet star. The 15 mas planet-star angular separation at maximum elongation will be resolved by ELTs (>3λD) in the optical bands of O2.
Fil: Bonfils, X.. Universite Grenoble Alpes; Francia
Fil: Astudillo Defru, Nicola. 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: Almenara, J.-M.. Universidad de Ginebra; Suiza
Fil: Forveille, T.. Universite Grenoble Alpes; Francia
Fil: Bouchy, F.. Universidad de Ginebra; Suiza
Fil: Delfosse, X.. Universite Grenoble Alpes; Francia
Fil: Lovis, C.. Universidad de Ginebra; Suiza
Fil: Mayor, M.. Universidad de Ginebra; Suiza
Fil: Murgas, F.. Instituto Astrofisico de Canarias; España. Universidad de La Laguna; España
Fil: Pepe, F.. Universidad de Ginebra; Suiza
Fil: Santos, N.C.. Universidad de Porto; Portugal
Fil: Ségransan, D.. Universidad de Ginebra; Suiza
Fil: Udry, S.. Universidad de Ginebra; Suiza
Fil: Wünsche, A.. Universite Grenoble Alpes; Francia
description The combination of high-contrast imaging and high-dispersion spectroscopy, which has successfully been use to detect the atmosphere of a giant planet, is one of the most promising potential probes of the atmosphere of Earth-size worlds. The forthcoming generation of extremely large telescopes (ELTs) may obtain sufficient contrast with this technique to detect O2 in the atmosphere of those worlds that orbit low-mass M dwarfs. This is strong motivation to carry out a census of planets around cool stars for which habitable zones can be resolved by ELTs, i.e. for M dwarfs within ~5 parsec. Our HARPS survey has been a major contributor to that sample of nearby planets. Here we report on our radial velocity observations of Ross 128 (Proxima Virginis, GJ447, HIP 57548), an M4 dwarf just 3.4 parsec away from our Sun. This source hosts an exo-Earth with a projected mass m sini = 1.35 M and an orbital period of 9.9 days. Ross 128 b receives less than 1.5 times as much flux as Earth from the Sun and its equilibrium ranges in temperature between 269 K for an Earth-like albedo and 213 K for a Venus-like albedo. Recent studies place it close to the inner edge of the conventional habitable zone. An 80-day long light curve from K2 campaign C01 demonstrates that Ross 128 b does not transit. Together with the All Sky Automated Survey (ASAS) photometry and spectroscopic activity indices, the K2 photometry shows that Ross 128 rotates slowly and has weak magnetic activity. In a habitability context, this makes survival of its atmosphere against erosion more likely. Ross 128 b is the second closest known exo-Earth, after Proxima Centauri b (1.3 parsec), and the closest temperate planet known around a quiet star. The 15 mas planet-star angular separation at maximum elongation will be resolved by ELTs (>3λD) in the optical bands of O2.
publishDate 2018
dc.date.none.fl_str_mv 2018-05
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/11336/209352
Bonfils, X.; Astudillo Defru, Nicola; Diaz, Rodrigo Fernando; Almenara, J.-M.; Forveille, T.; et al.; A temperate exo-Earth around a quiet M dwarf at 3.4 parsec; EDP Sciences; Astronomy and Astrophysics; 613; A25; 5-2018; 1-9
0004-6361
CONICET Digital
CONICET
url http://hdl.handle.net/11336/209352
identifier_str_mv Bonfils, X.; Astudillo Defru, Nicola; Diaz, Rodrigo Fernando; Almenara, J.-M.; Forveille, T.; et al.; A temperate exo-Earth around a quiet M dwarf at 3.4 parsec; EDP Sciences; Astronomy and Astrophysics; 613; A25; 5-2018; 1-9
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/doi/10.1051/0004-6361/201731973
info:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/articles/aa/full_html/2018/05/aa31973-17/aa31973-17.html
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 13.070432

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