| 题名 | Refined physical parameters for Chariklo's body and rings from stellar occultations observed between 2013 and 2020 |
| 作者 | Morgado，B. E.1,2,3; Sicardy，B.1; Braga-Ribas，F.1,2,3,4; Desmars，J.1,5,6; Gomes-Júnior，A. R.2,7; Bérard，D.1; Leiva，R.1,8,9; Ortiz，J. L.10; Vieira-Martins，R.2,3,11; Benedetti-Rossi，G.1,2,7; Santos-Sanz，P.10; Camargo，J. I.B.2,3; Duffard，R.10; Rommel，F. L.2,3,4; Assafin，M.2,11; Boufleur，R. C.2,3; Colas，F.6; Kretlow，M.10,12,13; Beisker，W.12,13; Sfair，R.7; Snodgrass，C.14; Morales，N.10; Fernández-Valenzuela，E.15; Amaral，L. S.16; Amarante，A.17; Artola，R. A.18; Backes，M.19,20; Bath，K. L.12,13; Bouley，S.21; Buie，M. W.22; Cacella，P.23; Colazo，C. A.24; Colque，J. P.25; Dauvergne，J. L.26; Dominik，M.27; Emilio，M.3,28; Erickson，C.29; Evans，R.19; Fabrega-Polleri，J.30; Garcia-Lambas，D.18; Giacchini，B. L.31,32  ; Hanna，W.33; Herald，D.12,33; Hesler，G.34; Hinse，T. C.35,36; Jacques，C.37; Jehin，E.38; Jørgensen，U. G.39; Kerr，S.33,40; Kouprianov，V.41,42; Levine，S. E.43,44; Linder，T.45; Maley，P. D.46,47; MacHado，D. I.48,49; Maquet，L.6; Maury，A.50; Melia，R.18; Meza，E.1,51,52; Mondon，B.34; Moura，T.7; Newman，J.33; Payet，T.34; Pereira，C. L.2,3,4; Pollock，J.53; Poltronieri，R. C.16,54; Quispe-Huaynasi，F.3; Reichart，D.41; De Santana，T.1,7; Schneiter，E. M.18; Sieyra，M. V.55; Skottfelt，J.56; Soulier，J. F.57; Starck，M.58; Thierry，P.59; Torres，P. J.60,61; Trabuco，L. L.49; Unda-Sanzana，E.25; Yamashita，T. A.R.7; Winter，O. C.7; Zapata，A.62,63; Zuluaga，C. A.44
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| 发表日期 | 2021-08-01
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| DOI | |
| 发表期刊 | |
| ISSN | 0004-6361
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| EISSN | 1432-0746
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| 卷号 | 652 |
| 摘要 | Context. The Centaur (10199) Chariklo has the first ring system discovered around a small object. It was first observed using stellar occultation in 2013. Stellar occultations allow sizes and shapes to be determined with kilometre accuracy, and provide the characteristics of the occulting object and its vicinity. Aims. Using stellar occultations observed between 2017 and 2020, our aim is to constrain the physical parameters of Chariklo and its rings. We also determine the structure of the rings, and obtain precise astrometrical positions of Chariklo. Methods. We predicted and organised several observational campaigns of stellar occultations by Chariklo. Occultation light curves were measured from the datasets, from which ingress and egress times, and the ring widths and opacity values were obtained. These measurements, combined with results from previous works, allow us to obtain significant constraints on Chariklo's shape and ring structure. Results. We characterise Chariklo's ring system (C1R and C2R), and obtain radii and pole orientations that are consistent with, but more accurate than, results from previous occultations. We confirm the detection of W-shaped structures within C1R and an evident variation in radial width. The observed width ranges between 4.8 and 9.1 km with a mean value of 6.5 km. One dual observation (visible and red) does not reveal any differences in the C1R opacity profiles, indicating a ring particle size larger than a few microns. The C1R ring eccentricity is found to be smaller than 0.022 (3σ), and its width variations may indicate an eccentricity higher than ~0.005. We fit a tri-axial shape to Chariklo's detections over 11 occultations, and determine that Chariklo is consistent with an ellipsoid with semi-axes of 143.8-1.5+1.4, 135.2-2.8+1.4, and 99.1-2.7+5.4 km. Ultimately, we provided seven astrometric positions at a milliarcsecond accuracy level, based on Gaia EDR3, and use it to improve Chariklo's ephemeris. |
| 关键词 | |
| 相关链接 | [Scopus记录] |
| 收录类别 | |
| 语种 | 英语
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| 学校署名 | 其他
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| WOS记录号 | WOS:000688233900003
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| EI入藏号 | 20213510847619
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| EI主题词 | Opacity
; Particle size
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| EI分类号 | Extraterrestrial Physics and Stellar Phenomena:657.2
; Light/Optics:741.1
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| ESI学科分类 | SPACE SCIENCE
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| Scopus记录号 | 2-s2.0-85113911250
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| 来源库 | Scopus
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| 引用统计 |
被引频次[WOS]：19
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| 成果类型 | 期刊论文 |
| 条目标识符 | http://sustech.caswiz.com/handle/2SGJ60CL/245655 |
| 专题 | 理学院_物理系 |
| 作者单位 | 1.Lesia,Observatoire de Paris,Université Psl,Cnrs,Sorbonne Université,Univ. Paris Diderot,Sorbonne Paris Cité,Meudon,5 place Jules Janssen,92195,France 2.Laboratório Interinstitucional de E-Astronomia - LIneA,Rio de Janeiro,Rua Gal. José Cristino 77,20921-400,Brazil 3.Observatório Nacional/MCTI,Rio de Janeiro - RJ,R. General José Cristino 77, CEP 20921-400,Brazil 4.Federal University of Technology - Paraná (UTFPR / DAFIS),Curitiba,Rua Sete de Setembro, 3165, CEP 80230-901,Brazil 5.Institut Polytechnique des Sciences Avancées Ipsa,Ivry-sur-Seine,63 boulevard de Brandebourg,94200,France 6.Institut de Mécanique Céleste et de Calcul des Éphémérides,Imcce,Observatoire de Paris,Psl Research University,Cnrs,Sorbonne Universités,Upmc Univ Paris 06,Univ. Lille,Paris,77, Av. Denfert-Rochereau,75014,France 7.Unesp - São Paulo State University,Grupo de Dinâmica Orbital e Planetologia,Cep 12516-410,Guaratinguetá,Brazil 8.Université Côte d'Azur,Observatoire de la Côte d'Azur,Cnrs,Laboratoire Lagrange,Nice Cedex 4,Bd de l'Observatoire, CS 34229,06304,France 9.Departamento de Astronomía,Universidad de Chile,Santiago,Camino del Observatorio 1515, Las Condes,Chile 10.Instituto de Astrofísica de Andalucía,IAA-CSIC,Granada,Glorieta de la Astronomía s/n,18008,Spain 11.Universidade Federal Do Rio de Janeiro - Observatório Do Valongo,Rio de Janeiro - RJ,Ladeira Pedro Antônio 43, CEP 20.080-090,Brazil 12.International Occultation Timing Association / European Section,Hannover,Am Brombeerhag 13,30459,Germany 13.Internationale Amateursternwarte E.V. (IAS),Mittenwalde,Mittelstrasse 6,15749,Germany 14.Institute for Astronomy,University of Edinburgh,Royal Observatory,Edinburgh,EH9 3HJ,United Kingdom 15.Florida Space Institute,University of Central Florida,Orlando,12354 Research Parkway, Partnership 1,United States 16.BRAMON-Brazilian Meteor Observation Network,Nhandeara,Brazil 17.Grupo de Matemática Aplicada e Processamento de Sinais,State University of Mato Grosso Do sul - Uems,Cassilândia,Cep 79540-000,Ms,Brazil 18.IATE-OAC,Universidad Nacional de Córdoba-CONICET,Córdoba,Laprida 854, X5000 BGR,Argentina 19.Department of Physics,Chemistry and Material Science,University of Namibia,Windhoek,Private Bag 13301,Namibia 20.Centre for Space Research,North-West University,Potchefstroom,2520,South Africa 21.Association T60,Observatoire Midi-Pyrénées,Toulouse,14 avenue Edouard Belin,31400,France 22.Southwest Research Institute,Boulder,1050 Walnut Street, Suite 300,80302,United States 23.Dogsheaven Observatory,Smpw Q25 CJ1 LT10B,Brasilia,Brazil 24.Association of Argentine Observatories of Minor Bodies (AOACM)),Argentina 25.Centro de Astronomía (CITEVA),Universidad de Antofagasta,Antofagasta,Av. Angamos 601,Chile 26.Ciel and Espace,Paris,France 27.University of St Andrews,Centre for Exoplanet Science,Supa School of Physics and Astronomy North Haugh,St Andrews,KY16 9SS,United Kingdom 28.Universidade Estadual de Ponta Grossa (UEPG),Ponta Grossa,Brazil 29.Summit Kinetics Inc,United States 30.Panamanian Observatory in San Pedro de Atacama - Opspa,San Pedro de Atacama,Chile 31.Department of Physics,Southern University of Science and Technology,Shenzhen,518055,China 32.Centro Brasileiro de Pesquisas Físicas,Rio de Janeiro,Rua Dr Xavier Sigaud 150,22290-180,Brazil 33.Trans-Tasman Occultation Alliance (TTOA),Wellington,3181,New Zealand 34.Association Réunionnaise Pour l'Etude du Ciel Austral - Areca,Sainte-Marie,La Réunion,France 35.Institute of Astronomy,Faculty of Physics,Astronomy and Informatics Nicolaus Copernicus University,Torun,Grudziadzka 5,87-100,Poland 36.Department of Astronomy and Space Science,Chungnam National University,Daejeon,34134,South Korea 37.Observatório Sonear,Oliveira,Brazil 38.Star Institute,Université de Liège,Liège,Allée du 6 août, 19C,4000,Belgium 39.Centre for ExoLife Sciences (CELS),Niels Bohr Institute,Copenhagen,øster Voldgade 5,1350,Denmark 40.Astronomical Association of Queensland,Pimpama,5 Curtis Street,4209,Australia 41.Department of Physics and Astronomy,University of North Carolina,Chapel Hill,United States 42.Central (Pulkovo) Observatory of the Russian Academy of Sciences,Saint Petersburg,196140, 65/1 Pulkovskoye Ave.,Russian Federation 43.Lowell Observatory,Flagstaff,1400 W Mars Hill Road,86001,United States 44.Massachusetts Institute of Technology,Department of Earth,Atmospheric and Planetary Sciences,Cambridge,77 Massachusetts Avenue,02139,United States 45.The Astronomical Research Institute,Ashmore,United States 46.International Occultation Timing Association (IOTA),PO Box 7152,98042,United States 47.Nasa Johnson Space Center Astronomical Society,Houston,United States 48.Universidade Estadual Do Oeste Do Paraná (Unioeste),Foz do Iguaçu,Avenida Tarquínio Joslin dos Santos 1300,85870-650,Brazil 49.Polo Astronômico Casimiro Montenegro Filho/FPTI-BR,Foz do Iguaçu,Avenida Tancredo Neves 6731,85867-900,Brazil 50.San Pedro de Atacama Celestial Explorations - Space,Chile 51.Comisión Nacional de Investigación y Desarrollo Aeroespacial Del Perú - Conida,Lima,Luis Felipe Villarán 1069, San Isidro,Peru 52.Observatorio Astronómico de Moquegua,Cp Cambrune Carumas,Moquegua,Peru 53.Physics and Astronomy Department,Appalachian State University,Boone,28608,United States 54.Astrocan Clube de Astronomia Nhandeara,Nhandeara,Brazil 55.Centre for Mathematical Plasma Astrophysics,Department of Mathematics,Ku Leuven,Leuven,Celestijnenlaan 200B,3001,Belgium 56.Centre for Electronic Imaging,Department of Physical Sciences,The Open University,Milton Keynes,MK7 6AA,United Kingdom 57.Association des Étoiles Pour Tous,Saint Martin du Boschet,19 Rue Saint Laurent Maisoncelles,77320,France 58.Observatorio Astronómico Córdoba Unc,Córdoba,Laprida 854,Argentina 59.Agora Observatoire des Makes,Agora,18 Rue Georges Bizet,Observatoire des Makes,La Rivière,97421,France 60.Institute of Astrophysics,Pontificia Universidad Catolica de Chile,Santiago,Av. Vicuña Mackenna,4860,Chile 61.Millennium Institute of Astrophysics,Chile 62.Centre of Astro-Engineering,Pontificia Universidad Catolica de Chile,Santiago,Av. Vicuña Mackenna 4860,Chile 63.Department of Electrical Engineering,Pontificia Universidad Catolica de Chile,Santiago,Av. Vicuña Mackenna,4860,Chile |
| 推荐引用方式 GB/T 7714 |
Morgado，B. E.,Sicardy，B.,Braga-Ribas，F.,et al. Refined physical parameters for Chariklo's body and rings from stellar occultations observed between 2013 and 2020[J]. ASTRONOMY & ASTROPHYSICS,2021,652.
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| APA |
Morgado，B. E..,Sicardy，B..,Braga-Ribas，F..,Desmars，J..,Gomes-Júnior，A. R..,...&Zuluaga，C. A..(2021).Refined physical parameters for Chariklo's body and rings from stellar occultations observed between 2013 and 2020.ASTRONOMY & ASTROPHYSICS,652.
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| MLA |
Morgado，B. E.,et al."Refined physical parameters for Chariklo's body and rings from stellar occultations observed between 2013 and 2020".ASTRONOMY & ASTROPHYSICS 652(2021).
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