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A low-mass planet candidate orbiting Proxima Centauri at a distance of 1.5 AU

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cris.lastimport.scopus2024-02-12T20:55:42Z
dc.abstract.enOur nearest neighbor, Proxima Centauri, hosts a temperate terrestrial planet. We detected in radial velocities evidence of a possible second planet with minimum mass mc sin ic = 5.8 ± 1.9M⊕ and orbital period Pc=5.21+0.26−0.22 years. The analysis of photometric data and spectro-scopic activity diagnostics does not explain the signal in terms of a stellar activity cycle, but follow-up is required in the coming years for confirming its planetary origin. We show that the existence of the planet can be ascertained, and its true mass can be determined with high accuracy, by combining Gaia astrometry and radial velocities. Proxima c could become a prime target for follow-up and characterization with next-generation direct imaging instrumentation due to the large maximum angular separation of ~1 arc second from the parent star. The candidate planet represents a challenge for the models of super-Earth formation and evolution.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorDamasso, Mario
dc.contributor.authorSordo, Fabio Del
dc.contributor.authorAnglada-Escudé, Guillem
dc.contributor.authorGiacobbe, Paolo
dc.contributor.authorSozzetti, Alessandro
dc.contributor.authorMorbidelli, Alessandro
dc.contributor.authorPojmański, Grzegorz
dc.contributor.authorBarbato, Domenico
dc.contributor.authorButler, R. Paul
dc.contributor.authorJones, Hugh R. A.
dc.contributor.authorHambsch, Franz-Josef
dc.contributor.authorJenkins, James S.
dc.contributor.authorLópez-González, María José
dc.contributor.authorMorales, Nicolás
dc.contributor.authorRojas, Pablo A. Peña
dc.contributor.authorRodríguez-López, Cristina
dc.contributor.authorRodríguez, Eloy
dc.contributor.authorAmado, Pedro J.
dc.contributor.authorAnglada, Guillem
dc.contributor.authorFeng, Fabo
dc.contributor.authorGómez, Jose F.
dc.date.accessioned2024-01-24T17:49:17Z
dc.date.available2024-01-24T17:49:17Z
dc.date.copyright2020-01-15
dc.date.issued2020
dc.description.accesstimeAT_PUBLICATION
dc.description.financePublikacja bezkosztowa
dc.description.number3
dc.description.versionFINAL_PUBLISHED
dc.description.volume6
dc.identifier.doi10.1126/SCIADV.AAX7467
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/101633
dc.identifier.weblinkhttp://adsabs.harvard.edu/abs/2020SciA....6.7467D
dc.languageeng
dc.pbn.affiliationastronomy
dc.relation.ispartofScience Advances
dc.relation.pageseaax7467
dc.rightsCC-BY
dc.sciencecloudnosend
dc.titleA low-mass planet candidate orbiting Proxima Centauri at a distance of 1.5 AU
dc.typeJournalArticle
dspace.entity.typePublication