Publicación:
Size and Shape of Chariklo from Multi-epoch Stellar Occultations

Página de artículo simple
dc.contributor.author Leiva, R es_PE
dc.contributor.author Sicardy, B es_PE
dc.contributor.author Camargo, JIB es_PE
dc.contributor.author Ortiz, JL es_PE
dc.contributor.author Desmars, J es_PE
dc.contributor.author Berard, D es_PE
dc.contributor.author Lellouch, E es_PE
dc.contributor.author Meza, E es_PE
dc.contributor.author Kervella, P es_PE
dc.contributor.author Snodgrass, C es_PE
dc.contributor.author Duffard, R es_PE
dc.contributor.author Morales, N es_PE
dc.contributor.author Gomes-Junior, AR es_PE
dc.contributor.author Benedetti-Rossi, G es_PE
dc.contributor.author Vieira-Martins, R es_PE
dc.contributor.author Braga-Ribas, F es_PE
dc.contributor.author Assafin, M es_PE
dc.contributor.author Morgado, BE es_PE
dc.contributor.author Colas, F es_PE
dc.contributor.author De Witt, C es_PE
dc.contributor.author Sickafoose, AA es_PE
dc.contributor.author Breytenbach, H es_PE
dc.contributor.author Dauvergne, JL es_PE
dc.contributor.author Schoenau, P es_PE
dc.contributor.author Maquet, L es_PE
dc.contributor.author Bath, KL es_PE
dc.contributor.author Bode, HJ es_PE
dc.contributor.author Cool, A es_PE
dc.contributor.author Lade, B es_PE
dc.contributor.author Kerr, S es_PE
dc.contributor.author Herald, D es_PE
dc.date.accessioned 2024-05-30T23:13:38Z
dc.date.available 2024-05-30T23:13:38Z
dc.date.issued 2017
dc.description E.M. acknowledges support from the Contrato de subvención 205-2014 Fondecyt—Concytec, Perú.
dc.description.abstract We use data from five stellar occultations observed between 2013 and 2016 to constrain Chariklo's size and shape, and the ring reflectivity. We consider four possible models for Chariklo (sphere, Maclaurin spheroid, triaxial ellipsoid, and Jacobi ellipsoid), and we use a Bayesian approach to estimate the corresponding parameters. The spherical model has a radius R = 129 ± 3 km. The Maclaurin model has equatorial and polar radii $a=b={143}_{-6}^{+3}\,\mathrm{km}$ and $c={96}_{-4}^{+14}\,\mathrm{km}$, respectively, with density ${970}_{-180}^{+300}\,\mathrm{kg}\,{{\rm{m}}}^{-3}$. The ellipsoidal model has semiaxes $a={148}_{-4}^{+6}\,\mathrm{km}$, $b={132}_{-5}^{+6}\,\mathrm{km}$, and $c={102}_{-8}^{+10}\,\mathrm{km}$. Finally, the Jacobi model has semiaxes a = 157 ± 4 km, b = 139 ± 4 km, and c = 86 ± 1 km, and density ${796}_{-4}^{+2}\,\mathrm{kg}\,{{\rm{m}}}^{-3}$. Depending on the model, we obtain topographic features of 6–11 km, typical of Saturn icy satellites with similar size and density. We constrain Chariklo's geometric albedo between 3.1% (sphere) and 4.9% (ellipsoid), while the ring I/F reflectivity is less constrained between 0.6% (Jacobi) and 8.9% (sphere). The ellipsoid model explains both the optical light curve and the long-term photometry variation of the system, giving a plausible value for the geometric albedo of the ring particles of 10%–15%. The derived mass of Chariklo of 6–8 × 1018 kg places the rings close to 3:1 resonance between the ring mean motion and Chariklo's rotation period.
dc.description.sponsorship Consejo Nacional de Ciencia, Tecnología e Innovación Tecnológica - Concytec
dc.identifier.doi https://doi.org/10.3847/1538-3881/aa8956
dc.identifier.isi 411618000002
dc.identifier.uri https://hdl.handle.net/20.500.12390/1062
dc.language.iso eng
dc.publisher IOP
dc.relation.ispartof Astronomical Journal
dc.rights info:eu-repo/semantics/openAccess
dc.subject stellar occultations
dc.subject ring reflectivity es_PE
dc.subject Bayesian approach es_PE
dc.subject.ocde https://purl.org/pe-repo/ocde/ford#1.03.00
dc.title Size and Shape of Chariklo from Multi-epoch Stellar Occultations
dc.type info:eu-repo/semantics/article
dspace.entity.type Publication
oairecerif.author.affiliation #PLACEHOLDER_PARENT_METADATA_VALUE#
oairecerif.author.affiliation #PLACEHOLDER_PARENT_METADATA_VALUE#
oairecerif.author.affiliation #PLACEHOLDER_PARENT_METADATA_VALUE#
oairecerif.author.affiliation #PLACEHOLDER_PARENT_METADATA_VALUE#
oairecerif.author.affiliation #PLACEHOLDER_PARENT_METADATA_VALUE#
oairecerif.author.affiliation #PLACEHOLDER_PARENT_METADATA_VALUE#
oairecerif.author.affiliation #PLACEHOLDER_PARENT_METADATA_VALUE#
oairecerif.author.affiliation #PLACEHOLDER_PARENT_METADATA_VALUE#
oairecerif.author.affiliation #PLACEHOLDER_PARENT_METADATA_VALUE#
oairecerif.author.affiliation #PLACEHOLDER_PARENT_METADATA_VALUE#
oairecerif.author.affiliation #PLACEHOLDER_PARENT_METADATA_VALUE#
oairecerif.author.affiliation #PLACEHOLDER_PARENT_METADATA_VALUE#
oairecerif.author.affiliation #PLACEHOLDER_PARENT_METADATA_VALUE#
oairecerif.author.affiliation #PLACEHOLDER_PARENT_METADATA_VALUE#
oairecerif.author.affiliation #PLACEHOLDER_PARENT_METADATA_VALUE#
oairecerif.author.affiliation #PLACEHOLDER_PARENT_METADATA_VALUE#
oairecerif.author.affiliation #PLACEHOLDER_PARENT_METADATA_VALUE#
oairecerif.author.affiliation #PLACEHOLDER_PARENT_METADATA_VALUE#
oairecerif.author.affiliation #PLACEHOLDER_PARENT_METADATA_VALUE#
oairecerif.author.affiliation #PLACEHOLDER_PARENT_METADATA_VALUE#
oairecerif.author.affiliation #PLACEHOLDER_PARENT_METADATA_VALUE#
oairecerif.author.affiliation #PLACEHOLDER_PARENT_METADATA_VALUE#
oairecerif.author.affiliation #PLACEHOLDER_PARENT_METADATA_VALUE#
oairecerif.author.affiliation #PLACEHOLDER_PARENT_METADATA_VALUE#
oairecerif.author.affiliation #PLACEHOLDER_PARENT_METADATA_VALUE#
oairecerif.author.affiliation #PLACEHOLDER_PARENT_METADATA_VALUE#
oairecerif.author.affiliation #PLACEHOLDER_PARENT_METADATA_VALUE#
oairecerif.author.affiliation #PLACEHOLDER_PARENT_METADATA_VALUE#
oairecerif.author.affiliation #PLACEHOLDER_PARENT_METADATA_VALUE#
oairecerif.author.affiliation #PLACEHOLDER_PARENT_METADATA_VALUE#
oairecerif.author.affiliation #PLACEHOLDER_PARENT_METADATA_VALUE#
Archivos
Colecciones
1.1 Eventos institucionales
 2.1 Estudios de doctorado y postdoctorado