Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/150352
COMPARTIR / EXPORTAR:
logo share SHARE logo core CORE BASE
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE

Invitar a revisión por pares abierta
Campo DC Valor Lengua/Idioma
dc.contributor.authorFulle, Marco-
dc.contributor.authorLópez-Moreno, José Juan-
dc.contributor.authorMorales, Rafael-
dc.contributor.authorOrtiz, José Luis-
dc.contributor.authorRodríguez Gómez, Julio-
dc.contributor.authorZakharov, V.-
dc.date.accessioned2017-05-25T06:52:14Z-
dc.date.available2017-05-25T06:52:14Z-
dc.date.issued2016-
dc.identifierdoi: 10.1093/mnras/stw2299-
dc.identifierissn: 0035-8711-
dc.identifier.citationMonthly Notices of the Royal Astronomical Society 462: S132- S137 (2016)-
dc.identifier.urihttp://hdl.handle.net/10261/150352-
dc.description.abstractSolar system formation models predict that the building blocks of planetesimals were mm- to cm-sized pebbles, aggregates of ices and non-volatile materials, consistent with the compact particles ejected by comet 67P/Churyumov-Gerasimenko (67P hereafter) and detected by GIADA (Grain Impact Analyzer and Dust Accumulator) on-board the Rosetta spacecraft. Planetesimals were formed by the gentle gravitational accretion of pebbles, so that they have an internal macroporosity of 40 per cent. We measure the average dust bulk density ¿D = 795+840 -65 kg m-3 that, coupled to the nucleus bulk density, provides the average dust-toices mass ratio ¿ = 8.5. We find that the measured densities of the 67P pebbles are consistent with a mixture of (15 ± 6) per cent of ices, (5 ± 2) per cent of Fe-sulphides, (28 ± 5) per cent of silicates, and (52 ± 12) per cent of hydrocarbons, in average volume abundances. This composition matches both the solar and CI-chondritic chemical abundances, thus showing that GIADA has sampled the typical non-volatile composition of the pebbles that formed all planetesimals. The GIADA data do not constrain the abundance of amorphous silicates versus crystalline Mg, Fe-olivines and pyroxenes. We find that the pebbles have a microporosity of (52 ± 8) per cent (internal volume filling factor ¿P = 0.48 ± 0.08), implying an average porosity for the 67P nucleus of (71 ± 8) per cent, lower than previously estimated. © 2016 The Authors.-
dc.description.sponsorshipThis research was supported by the Italian Space Agency (ASI) within the INAF-ASI agreements I/032/05/0 and I/024/12/0.-
dc.publisherOxford University Press-
dc.relation.isversionofPublisher's version-
dc.rightsopenAccess-
dc.subjectComets: individual: 67P/Churyumov-
dc.subjectGerasimenko-
dc.subjectSpace vehicles-
dc.subjectComets: general-
dc.titleComet 67P/Churyumov-Gerasimenko preserved the pebbles that formed planetesimals-
dc.typeartículo-
dc.identifier.doi10.1093/mnras/stw2299-
dc.date.updated2017-05-25T06:52:14Z-
dc.description.versionPeer Reviewed-
dc.language.rfc3066eng-
dc.rights.licensehttp://dx.doi.org/10.1093/mnras/stw2299-
dc.contributor.funderAgenzia Spaziale Italiana-
dc.relation.csic-
dc.identifier.funderhttp://dx.doi.org/10.13039/501100003981es_ES
dc.type.coarhttp://purl.org/coar/resource_type/c_6501es_ES
item.openairetypeartículo-
item.cerifentitytypePublications-
item.grantfulltextopen-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.fulltextWith Fulltext-
Aparece en las colecciones: (IAA) Artículos
Ficheros en este ítem:
Fichero Descripción Tamaño Formato
IAA_2016_MNRASstw2299.pdf479,43 kBAdobe PDFVista previa
Visualizar/Abrir
Show simple item record

CORE Recommender

SCOPUSTM   
Citations

90
checked on 15-mar-2024

WEB OF SCIENCETM
Citations

85
checked on 28-feb-2024

Page view(s)

282
checked on 28-mar-2024

Download(s)

176
checked on 28-mar-2024

Google ScholarTM

Check

Altmetric

Altmetric


NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.