Changing material around (2060) Chiron revealed by an occultation on December 15, 2022

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Autor(es): dc.contributorConsejo Superior de Investigaciones Científicas-
Autor(es): dc.contributorMCTI-
Autor(es): dc.contributorLaboratório Interinstitucional de e-Astronomia -LIneA-
Autor(es): dc.contributorCNRS-
Autor(es): dc.contributorFederal University of Technology -Paraná (UTFPR-Curitiba)-
Autor(es): dc.contributorNational Research Institute of Astronomy and Geophysics (NRIAG)-
Autor(es): dc.contributorTel Aviv University-
Autor(es): dc.contributorInternational Occultation Timing Association -European Section (IOTA/ES)-
Autor(es): dc.contributorInstitut Polytechnique des Sciences Avancées IPSA-
Autor(es): dc.contributorUniv. Lille-
Autor(es): dc.contributorUniversidade Federal do Rio de Janeiro (UFRJ)-
Autor(es): dc.contributorUCF-
Autor(es): dc.contributorUniversity of California-
Autor(es): dc.contributorUniversity of Namur-
Autor(es): dc.contributorFaculty of Sciences-
Autor(es): dc.contributorTÜBITAK National Observatory-
Autor(es): dc.contributorFaculty of Science-
Autor(es): dc.contributorUniversidad de Alicante-
Autor(es): dc.contributorEberhard Karls University of Tübingen-
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.creatorOrtiz, J. L.-
Autor(es): dc.creatorPereira, C. L.-
Autor(es): dc.creatorSicardy, B.-
Autor(es): dc.creatorBraga-Ribas, F.-
Autor(es): dc.creatorTakey, A.-
Autor(es): dc.creatorFouad, A. M.-
Autor(es): dc.creatorShaker, A. A.-
Autor(es): dc.creatorKaspi, S.-
Autor(es): dc.creatorBrosch, N.-
Autor(es): dc.creatorKretlow, M.-
Autor(es): dc.creatorLeiva, R.-
Autor(es): dc.creatorDesmars, J.-
Autor(es): dc.creatorMorgado, B. E.-
Autor(es): dc.creatorMorales, N.-
Autor(es): dc.creatorVara-Lubiano, M.-
Autor(es): dc.creatorSantos-Sanz, P.-
Autor(es): dc.creatorFernández-Valenzuela, E.-
Autor(es): dc.creatorSouami, D.-
Autor(es): dc.creatorDuffard, R.-
Autor(es): dc.creatorRommel, F. L.-
Autor(es): dc.creatorKilic, Y.-
Autor(es): dc.creatorErece, O.-
Autor(es): dc.creatorKoseoglu, D.-
Autor(es): dc.creatorEge, E.-
Autor(es): dc.creatorMorales, R.-
Autor(es): dc.creatorAlvarez-Candal, A.-
Autor(es): dc.creatorRizos, J. L.-
Autor(es): dc.creatorGómez-Limón, J. M.-
Autor(es): dc.creatorAssafin, M.-
Autor(es): dc.creatorVieira-Martins, R.-
Autor(es): dc.creatorGomes-Júnior, A. R.-
Autor(es): dc.creatorCamargo, J. I.B.-
Autor(es): dc.creatorLecacheux, J.-
Data de aceite: dc.date.accessioned2025-08-21T15:55:25Z-
Data de disponibilização: dc.date.available2025-08-21T15:55:25Z-
Data de envio: dc.date.issued2025-04-29-
Data de envio: dc.date.issued2023-08-01-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1051/0004-6361/202347025-
Fonte completa do material: dc.identifierhttps://hdl.handle.net/11449/306648-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/306648-
Descrição: dc.descriptionWe were able to accurately predict the shadow path and successfully observe an occultation of a bright star by Chiron on December 15, 2022. The Kottamia Astronomical Observatory in Egypt did not detect the occultation by the solid body, but we found three extinction features in the light curve that had symmetrical counterparts with respect to the central time of the occultation. One of the features is broad and shallow, whereas the other two features are sharper, with a maximum extinction of ∼25% at the achieved spatial resolution of 19 km per data point. From the Wise Observatory in Israel, we detected the occultation caused by the main body and several extinction features surrounding the body. When all the secondary features are plotted in the sky plane, we find that they can be caused by a broad ∼580 km disk with concentrations at radii of 325 ± 16 km and 423 ± 11 km surrounding Chiron. At least one of these structures appears to be outside the Roche limit. The ecliptic coordinates of the pole of the disk are λ = 151° ±8 and β = 18° ±11, in agreement with previous results. We also reveal our long-term photometry results, indicating that Chiron had suffered a brightness outburst of at least 0.6 mag between March and September 2021 and that Chiron was still somewhat brighter at the occultation date than at its nominal pre-outburst phase. The outermost extinction features might be consistent with a bound or temporarily bound structure associated with the brightness increase. However, the nature of the brightness outburst is unclear, and it is also unclear whether the dust or ice released in the outburst could be feeding a putative ring structure or whether it is emanating from it.-
Descrição: dc.descriptionInstituto de Astrofísica de Andalucía Consejo Superior de Investigaciones Científicas, Glorieta de la Astronomía s/n-
Descrição: dc.descriptionObservatório Nacional MCTI, R. General José Cristino 77, RJ-
Descrição: dc.descriptionLaboratório Interinstitucional de e-Astronomia -LIneA, RJ-
Descrição: dc.descriptionLESIA Observatoire de Paris Université PSL Sorbonne Université Université de Paris CNRS-
Descrição: dc.descriptionFederal University of Technology -Paraná (UTFPR-Curitiba), Rua Sete de Setembro, 3165, PR-
Descrição: dc.descriptionNational Research Institute of Astronomy and Geophysics (NRIAG), Helwan-
Descrição: dc.descriptionThe Wise Observatory The Raymond and Beverly Sackler School of Physics and Astronomy The Faculty of Exact Sciences Tel Aviv University-
Descrição: dc.descriptionInternational Occultation Timing Association -European Section (IOTA/ES), Am Brombeerhag 13-
Descrição: dc.descriptionInstitut Polytechnique des Sciences Avancées IPSA, 63 boulevard de Brandebourg-
Descrição: dc.descriptionInstitut de Mécanique Céleste et de Calcul des Éphémérides IMCCE Observatoire de Paris PSL Research University CNRS Sorbonne Universités UPMC Univ Paris 06 Univ. Lille-
Descrição: dc.descriptionUniversidade Federal do Rio de Janeiro Observatório do Valongo, Ladeira Pedro Antônio 43, RJ-
Descrição: dc.descriptionFlorida Space Institute UCF, 12354 Research Parkway, Partnership 1 Building-
Descrição: dc.descriptionDepartments of Astronomy and of Earth and Planetary Science University of California, 501 Campbell Hall-
Descrição: dc.descriptionNaXys University of Namur, 8 Rempart de la Vierge-
Descrição: dc.descriptionAkdeniz University Faculty of Sciences Department of Space Sciences and Technologies-
Descrição: dc.descriptionTÜBITAK National Observatory, Akdeniz University Campus-
Descrição: dc.descriptionIstanbul University Faculty of Science Department of Astronomy and Space Sciences, Beyazit-
Descrição: dc.descriptionInstituto de Física Aplicada a las Ciencias y las Tecnologías Universidad de Alicante, San Vicent del Raspeig-
Descrição: dc.descriptionInstitute for Astronomy and Astrophysics Eberhard Karls University of Tübingen-
Descrição: dc.descriptionOrbital Dynamics and Planetology Group UNESP São Paulo State University-
Descrição: dc.descriptionOrbital Dynamics and Planetology Group UNESP São Paulo State University-
Idioma: dc.languageen-
Relação: dc.relationAstronomy and Astrophysics-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectAsteroids: individual: Chiron-
Palavras-chave: dc.subjectComets: general-
Palavras-chave: dc.subjectKuiper belt: general-
Palavras-chave: dc.subjectMinor planets-
Palavras-chave: dc.subjectOccultations-
Título: dc.titleChanging material around (2060) Chiron revealed by an occultation on December 15, 2022-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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