Changing material around (2060) Chiron revealed by an occultation on December 15, 2022
We 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...
| Autores: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
|---|---|
| Formato: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2023 |
| País: | Brasil |
| Recursos: | Universidade Estadual Paulista (UNESP) |
| Repositorio: | Repositório Institucional da UNESP |
| Idioma: | inglés |
| OAI Identifier: | oai:repositorio.unesp.br:11449/306648 |
| Acesso em linha: | http://dx.doi.org/10.1051/0004-6361/202347025 https://hdl.handle.net/11449/306648 |
| Access Level: | acceso abierto |
| Palavra-chave: | Asteroids: individual: Chiron Comets: general Kuiper belt: general Minor planets Occultations |
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| dc.title.none.fl_str_mv |
Changing material around (2060) Chiron revealed by an occultation on December 15, 2022 |
| title |
Changing material around (2060) Chiron revealed by an occultation on December 15, 2022 |
| spellingShingle |
Changing material around (2060) Chiron revealed by an occultation on December 15, 2022 Ortiz, J. L. Asteroids: individual: Chiron Comets: general Kuiper belt: general Minor planets Occultations |
| title_short |
Changing material around (2060) Chiron revealed by an occultation on December 15, 2022 |
| title_full |
Changing material around (2060) Chiron revealed by an occultation on December 15, 2022 |
| title_fullStr |
Changing material around (2060) Chiron revealed by an occultation on December 15, 2022 |
| title_full_unstemmed |
Changing material around (2060) Chiron revealed by an occultation on December 15, 2022 |
| title_sort |
Changing material around (2060) Chiron revealed by an occultation on December 15, 2022 |
| dc.creator.none.fl_str_mv |
Ortiz, J. L. Pereira, C. L. Sicardy, B. Braga-Ribas, F. Takey, A. Fouad, A. M. Shaker, A. A. Kaspi, S. Brosch, N. Kretlow, M. Leiva, R. Desmars, J. Morgado, B. E. Morales, N. Vara-Lubiano, M. Santos-Sanz, P. Fernández-Valenzuela, E. Souami, D. Duffard, R. Rommel, F. L. Kilic, Y. Erece, O. Koseoglu, D. Ege, E. Morales, R. Alvarez-Candal, A. Rizos, J. L. Gómez-Limón, J. M. Assafin, M. Vieira-Martins, R. Gomes-Júnior, A. R. [UNESP] Camargo, J. I.B. Lecacheux, J. |
| author |
Ortiz, J. L. |
| author_facet |
Ortiz, J. L. Pereira, C. L. Sicardy, B. Braga-Ribas, F. Takey, A. Fouad, A. M. Shaker, A. A. Kaspi, S. Brosch, N. Kretlow, M. Leiva, R. Desmars, J. Morgado, B. E. Morales, N. Vara-Lubiano, M. Santos-Sanz, P. Fernández-Valenzuela, E. Souami, D. Duffard, R. Rommel, F. L. Kilic, Y. Erece, O. Koseoglu, D. Ege, E. Morales, R. Alvarez-Candal, A. Rizos, J. L. Gómez-Limón, J. M. Assafin, M. Vieira-Martins, R. Gomes-Júnior, A. R. [UNESP] Camargo, J. I.B. Lecacheux, J. |
| author_role |
author |
| author2 |
Pereira, C. L. Sicardy, B. Braga-Ribas, F. Takey, A. Fouad, A. M. Shaker, A. A. Kaspi, S. Brosch, N. Kretlow, M. Leiva, R. Desmars, J. Morgado, B. E. Morales, N. Vara-Lubiano, M. Santos-Sanz, P. Fernández-Valenzuela, E. Souami, D. Duffard, R. Rommel, F. L. Kilic, Y. Erece, O. Koseoglu, D. Ege, E. Morales, R. Alvarez-Candal, A. Rizos, J. L. Gómez-Limón, J. M. Assafin, M. Vieira-Martins, R. Gomes-Júnior, A. R. [UNESP] Camargo, J. I.B. Lecacheux, J. |
| author2_role |
author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author author |
| dc.contributor.none.fl_str_mv |
Consejo Superior de Investigaciones Científicas MCTI Laboratório Interinstitucional de e-Astronomia -LIneA CNRS Federal University of Technology -Paraná (UTFPR-Curitiba) National Research Institute of Astronomy and Geophysics (NRIAG) Tel Aviv University International Occultation Timing Association -European Section (IOTA/ES) Institut Polytechnique des Sciences Avancées IPSA Univ. Lille Universidade Federal do Rio de Janeiro (UFRJ) UCF University of California University of Namur Faculty of Sciences TÜBITAK National Observatory Faculty of Science Universidad de Alicante Eberhard Karls University of Tübingen Universidade Estadual Paulista (UNESP) |
| dc.subject.por.fl_str_mv |
Asteroids: individual: Chiron Comets: general Kuiper belt: general Minor planets Occultations |
| topic |
Asteroids: individual: Chiron Comets: general Kuiper belt: general Minor planets Occultations |
| description |
We 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. |
| publishDate |
2023 |
| dc.date.none.fl_str_mv |
2023-08-01 2025-04-29T20:06:49Z |
| dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
| dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
| format |
article |
| status_str |
publishedVersion |
| dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1051/0004-6361/202347025 Astronomy and Astrophysics, v. 676. 1432-0746 0004-6361 https://hdl.handle.net/11449/306648 10.1051/0004-6361/202347025 2-s2.0-85169025553 |
| url |
http://dx.doi.org/10.1051/0004-6361/202347025 https://hdl.handle.net/11449/306648 |
| identifier_str_mv |
Astronomy and Astrophysics, v. 676. 1432-0746 0004-6361 10.1051/0004-6361/202347025 2-s2.0-85169025553 |
| dc.language.iso.fl_str_mv |
eng |
| language |
eng |
| dc.relation.none.fl_str_mv |
Astronomy and Astrophysics |
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info:eu-repo/semantics/openAccess |
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openAccess |
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Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
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Universidade Estadual Paulista (UNESP) |
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UNESP |
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UNESP |
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Repositório Institucional da UNESP |
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Repositório Institucional da UNESP |
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Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
| repository.mail.fl_str_mv |
repositoriounesp@unesp.br |
| _version_ |
1853671508096843776 |
| spelling |
Changing material around (2060) Chiron revealed by an occultation on December 15, 2022Asteroids: individual: ChironComets: generalKuiper belt: generalMinor planetsOccultationsWe 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.Instituto de Astrofísica de Andalucía Consejo Superior de Investigaciones Científicas, Glorieta de la Astronomía s/nObservatório Nacional MCTI, R. General José Cristino 77, RJLaboratório Interinstitucional de e-Astronomia -LIneA, RJLESIA Observatoire de Paris Université PSL Sorbonne Université Université de Paris CNRSFederal University of Technology -Paraná (UTFPR-Curitiba), Rua Sete de Setembro, 3165, PRNational Research Institute of Astronomy and Geophysics (NRIAG), HelwanThe Wise Observatory The Raymond and Beverly Sackler School of Physics and Astronomy The Faculty of Exact Sciences Tel Aviv UniversityInternational Occultation Timing Association -European Section (IOTA/ES), Am Brombeerhag 13Institut Polytechnique des Sciences Avancées IPSA, 63 boulevard de BrandebourgInstitut de Mécanique Céleste et de Calcul des Éphémérides IMCCE Observatoire de Paris PSL Research University CNRS Sorbonne Universités UPMC Univ Paris 06 Univ. LilleUniversidade Federal do Rio de Janeiro Observatório do Valongo, Ladeira Pedro Antônio 43, RJFlorida Space Institute UCF, 12354 Research Parkway, Partnership 1 BuildingDepartments of Astronomy and of Earth and Planetary Science University of California, 501 Campbell HallNaXys University of Namur, 8 Rempart de la ViergeAkdeniz University Faculty of Sciences Department of Space Sciences and TechnologiesTÜBITAK National Observatory, Akdeniz University CampusIstanbul University Faculty of Science Department of Astronomy and Space Sciences, BeyazitInstituto de Física Aplicada a las Ciencias y las Tecnologías Universidad de Alicante, San Vicent del RaspeigInstitute for Astronomy and Astrophysics Eberhard Karls University of TübingenOrbital Dynamics and Planetology Group UNESP São Paulo State UniversityOrbital Dynamics and Planetology Group UNESP São Paulo State UniversityConsejo Superior de Investigaciones CientíficasMCTILaboratório Interinstitucional de e-Astronomia -LIneACNRSFederal University of Technology -Paraná (UTFPR-Curitiba)National Research Institute of Astronomy and Geophysics (NRIAG)Tel Aviv UniversityInternational Occultation Timing Association -European Section (IOTA/ES)Institut Polytechnique des Sciences Avancées IPSAUniv. LilleUniversidade Federal do Rio de Janeiro (UFRJ)UCFUniversity of CaliforniaUniversity of NamurFaculty of SciencesTÜBITAK National ObservatoryFaculty of ScienceUniversidad de AlicanteEberhard Karls University of TübingenUniversidade Estadual Paulista (UNESP)2025-04-29T20:06:49Z2023-08-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1051/0004-6361/202347025Astronomy and Astrophysics, v. 676.1432-07460004-6361https://hdl.handle.net/11449/30664810.1051/0004-6361/2023470252-s2.0-85169025553Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengAstronomy and Astrophysicsinfo:eu-repo/semantics/openAccessOrtiz, J. L.Pereira, C. L.Sicardy, B.Braga-Ribas, F.Takey, A.Fouad, A. M.Shaker, A. A.Kaspi, S.Brosch, N.Kretlow, M.Leiva, R.Desmars, J.Morgado, B. E.Morales, N.Vara-Lubiano, M.Santos-Sanz, P.Fernández-Valenzuela, E.Souami, D.Duffard, R.Rommel, F. L.Kilic, Y.Erece, O.Koseoglu, D.Ege, E.Morales, R.Alvarez-Candal, A.Rizos, J. L.Gómez-Limón, J. M.Assafin, M.Vieira-Martins, R.Gomes-Júnior, A. R. [UNESP]Camargo, J. I.B.Lecacheux, J.2025-04-30T14:37:06Zoai:repositorio.unesp.br:11449/306648Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestrepositoriounesp@unesp.bropendoar:29462025-04-30T14:37:06Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
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