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A rich population of free-floating planets in the Upper Scorpius young stellar association

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dc.contributor.authorMiret Roig, Nuria
dc.contributor.authorBouy, Hervé
dc.contributor.authorRaymond, Sean N.
dc.contributor.authorTamura, Motohide
dc.contributor.authorBertin, Emmanuel
dc.contributor.authorBarrado, David
dc.contributor.authorOlivares Romero, Javier
dc.contributor.authorGalli, P. A. B.
dc.contributor.authorCuillandre, Jean-Charles
dc.contributor.authorSarro Baro, Luis Manuel
dc.contributor.authorBerihuete, Ángel
dc.contributor.authorHuelamo, Nuria
dc.contributor.orcidhttps://orcid.org/0000-0001-5292-0421
dc.contributor.orcidhttps://orcid.org/0000-0002-7084-487X
dc.contributor.orcidhttps://orcid.org/0000-0001-8974-0758
dc.contributor.orcidhttps://orcid.org/0000-0002-6510-0681
dc.contributor.orcidhttps://orcid.org/0000-0002-3602-3664
dc.contributor.orcidhttps://orcid.org/0000-0002-5971-9242
dc.contributor.orcidhttps://orcid.org/0000-0003-2271-9297
dc.contributor.orcidhttps://orcid.org/0000-0002-3263-8645
dc.contributor.orcidhttps://orcid.org/0000-0002-8589-4423
dc.contributor.orcidhttps://orcid.org/0000-0002-2711-8143
dc.date.accessioned2024-06-05T15:54:41Z
dc.date.available2024-06-05T15:54:41Z
dc.date.issued2021-12-22
dc.descriptionThe registered version of this article, first published in Nature Astronomy, is available online at the publisher's website: Springer Nature, https://doi.org/10.1038/s41550-021-01513-x
dc.descriptionLa versión registrada de este artículo, publicado por primera vez en Nature Astronomy, está disponible en línea en el sitio web del editor: Springer Nature, https://doi.org/10.1038/s41550-021-01513-x
dc.description.abstractFree-floating planets (FFPs) are planetary-mass objects that are not bound to host stars. First discovered in the 1990s, their nature and origin are still largely unconstrained because of a lack of large homogeneous samples enabling a statistical analysis of their properties. To date, most FFPs have been discovered using indirect methods; micro-lensing surveys have proven particularly successful to detect these objects down to a few Earth masses1, 2. However, the ephemeral nature of micro-lensing events prevents any follow-up observations and individual characterisation. Several studies have identified FFPs in young stellar clusters3, 4 and the Galactic field5 but their samples are small or heterogeneous in age and origin. Here we report the discovery of between 70 and 170 FFPs (depending on the assumed age) in the region encompassing Upper Scorpius (USC) and Ophiuchus (Oph), the closest young OB association to the Sun. It is the largest homogeneous sample of nearly coeval FFPs discovered to date. We found an excess of FFPs by a factor of up to seven compared to core-collapse models predictions6–8, demonstrating that other formation mechanisms may be at work. We estimate that ejection from planetary systems might have a contribution comparable to that of core-collapse in the formation of FFPs. Therefore, ejections due to dynamical instabilities in giant exoplanet systems must be frequent within the first 10 Myr of a system’s life.en
dc.description.versionversión original
dc.identifier.citationMiret-Roig, N., Bouy, H., Raymond, S.N. et al. A rich population of free-floating planets in the Upper Scorpius young stellar association. Nat Astron 6, 89–97 (2022). https://doi.org/10.1038/s41550-021-01513-x
dc.identifier.doihttps://doi.org/10.1038/s41550-021-01513-x
dc.identifier.issn2397-3366
dc.identifier.urihttps://hdl.handle.net/20.500.14468/22270
dc.journal.titleNature Astronomy
dc.journal.volume6
dc.language.isoen
dc.page.final97
dc.page.initial89
dc.publisherSpringer Nature
dc.relation.centerFacultades y escuelas::E.T.S. de Ingeniería Informática
dc.relation.departmentInteligencia Artificial
dc.rightsAtribución-NoComercial-SinDerivadas 4.0 Internacional
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/deed.es
dc.subject33 Ciencias Tecnológicas
dc.titleA rich population of free-floating planets in the Upper Scorpius young stellar associationen
dc.typeartículoes
dc.typejournal articleen
dspace.entity.typePublication
person.familyNameOlivares Romero
person.familyNameSarro Baro
person.givenNameJavier
person.givenNameLuis Manuel
person.identifier.orcid0000-0002-5622-5191
relation.isAuthorOfPublicatione55cff36-187f-49e9-81cb-cbaf28716c53
relation.isAuthorOfPublication9f881bbd-b55d-43bd-87b0-41f8f72cff48
relation.isAuthorOfPublication.latestForDiscoverye55cff36-187f-49e9-81cb-cbaf28716c53
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