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dc.contributor.author
Osborn, H. P.
dc.contributor.author
Santerne, A.
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Barros, S. C. C.
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Santos, N. C.
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Dumusque, X.
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Malavolta, L.
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Armstrong, D. J.
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Hojjatpanah, S.
dc.contributor.author
Demangeon, O.
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Adibekyan, V.
dc.contributor.author
Almenara, J. M.
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Barrado, D.
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Bayliss, D.
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Boisse, I.
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Bouchy, F.
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Brown, D. J. A.
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Cameron, A. C.
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Charbonneau, D.
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Deleuil, M.
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Delgado Mena, E.
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Diaz, Rodrigo Fernando
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Hébrard, G.
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Kirk, J.
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King, G. W.
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Lam, K. W. F.
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Latham, D.
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Lillo Box, J.
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Louden, T. M.
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Lovis, C.
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Marmier, M.
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McCormac, J.
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Molinari, E.
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Pepe, F.
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Pollacco, D.
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Sousa, S. G.
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Udry, S.
dc.contributor.author
Walker, S. R.
dc.date.available
2017-09-19T15:32:26Z
dc.date.issued
2017-08
dc.identifier.citation
Osborn, H. P.; Santerne, A.; Barros, S. C. C.; Santos, N. C.; Dumusque, X.; et al.; K2-110 b: A massive mini-Neptune exoplanet; EDP Sciences; Astronomy and Astrophysics; 604; A19; 8-2017; 1-8
dc.identifier.issn
0004-6361
dc.identifier.uri
http://hdl.handle.net/11336/24573
dc.description.abstract
We report the discovery of the exoplanet K2-110 b (previously EPIC212521166b) from K2 photometry orbiting in a 13.8637d period around an old, metal-poor K3 dwarf star. With a V-band magnitude of 11.9, K2-110 is particularly amenable to RV follow-up. A joint analysis of K2 photometry and high-precision RVs from 28 HARPS and HARPS-N spectra reveal it to have a radius of 2.6 ± 0.1R⊕ and a mass of 16.7 ± 3.2M⊕, hence a density of 5.2 ± 1.2 g cm-3, making it one of the most massive planets yet to be found with a sub-Neptune radius. When accounting for compression, the resulting Earth-like density is best fitted by a 0.2M⊕ hydrogen atmosphere over an 16.5M⊕ Earth-like interior, although the planet could also have significant water content. At 0.1 AU, even taking into account the old stellar age of 8 ± 3 Gyr, the planet is unlikely to have been significantly affected by EUV evaporation. However the planet likelydisc-migrated to its current position making the lack of a thick H2 atmosphere puzzling. This analysis has made K2-110 b one of the best-characterised mini-Neptunes with density constrained to less than 30%.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
EDP Sciences
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Planets And Satellites: Detection
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Astronomía
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Ciencias Físicas
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CIENCIAS NATURALES Y EXACTAS
dc.title
K2-110 b: A massive mini-Neptune exoplanet
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2017-09-11T21:05:34Z
dc.journal.volume
604
dc.journal.number
A19
dc.journal.pagination
1-8
dc.journal.pais
Francia
dc.journal.ciudad
Paris
dc.description.fil
Fil: Osborn, H. P.. University Of Warwick; Reino Unido
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Fil: Santerne, A.. Universidad de Porto; Portugal
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Fil: Barros, S. C. C.. Universidad de Porto; Portugal
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Fil: Santos, N. C.. Universidad de Porto; Portugal
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Fil: Dumusque, X.. Universidad de Ginebra; Suiza
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Fil: Malavolta, L.. Università di Padova; Italia
dc.description.fil
Fil: Armstrong, D. J.. The Queens University Of Belfast; Irlanda. University Of Warwick; Reino Unido
dc.description.fil
Fil: Hojjatpanah, S.. Universidad de Porto; Portugal
dc.description.fil
Fil: Demangeon, O.. Laboratoire D; Francia
dc.description.fil
Fil: Adibekyan, V.. Universidad de Porto; Portugal
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Fil: Almenara, J. M.. Centre National de la Recherche Scientifique; Francia
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Fil: Barrado, D.. Centre National de la Recherche Scientifique; Francia
dc.description.fil
Fil: Bayliss, D.. Universidad de Ginebra; Suiza
dc.description.fil
Fil: Boisse, I.. Laboratoire D; Francia
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Fil: Bouchy, F.. Universidad de Ginebra; Suiza
dc.description.fil
Fil: Brown, D. J. A.. University Of Warwick; Reino Unido
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Fil: Cameron, A. C.. University of St. Andrews; Reino Unido
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Fil: Charbonneau, D.. Harvard-Smithsonian Center for Astrophysics; Estados Unidos
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Fil: Deleuil, M.. Laboratoire D; Francia
dc.description.fil
Fil: Delgado Mena, E.. Universidad de Porto; Portugal
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Fil: Diaz, Rodrigo Fernando. Universidad de Buenos Aires; Argentina. 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 Ginebra; Suiza
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Fil: Hébrard, G.. Universite Pierre et Marie Curie; Francia
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Fil: Kirk, J.. University Of Warwick; Reino Unido
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Fil: King, G. W.. University Of Warwick; Reino Unido
dc.description.fil
Fil: Lam, K. W. F.. University Of Warwick; Reino Unido
dc.description.fil
Fil: Latham, D.. Harvard-Smithsonian Center for Astrophysics; Estados Unidos
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Fil: Lillo Box, J.. European Southern Observatory; Chile
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Fil: Louden, T. M.. University Of Warwick; Reino Unido
dc.description.fil
Fil: Lovis, C.. Universidad de Ginebra; Suiza
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Fil: Marmier, M.. Universidad de Ginebra; Suiza
dc.description.fil
Fil: McCormac, J.. University Of Warwick; Reino Unido
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Fil: Molinari, E.. Istituto Di Astrofisica Spaziale E Fisica Cosmica; Italia
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Fil: Pepe, F.. Universidad de Ginebra; Suiza
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Fil: Pollacco, D.. University Of Warwick; Reino Unido
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Fil: Sousa, S. G.. Universidad de Porto; Portugal
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Fil: Udry, S.. Universidad de Ginebra; Suiza
dc.description.fil
Fil: Walker, S. R.. University Of Warwick; Reino Unido
dc.journal.title
Astronomy and Astrophysics
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1051/0004-6361/201628932
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/articles/aa/abs/2017/08/aa28932-16/aa28932-16.html
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