The two rings of (50000) Quaoar

dc.contributor.authorPereira, C. L.
dc.contributor.authorSicardy, B.
dc.contributor.authorMorgado, B. E.
dc.contributor.authorBraga-Ribas, F.
dc.contributor.authorFernández-Valenzuela, E.
dc.contributor.authorSouami, D.
dc.contributor.authorHoller, B. J.
dc.contributor.authorBoufleur, R. C.
dc.contributor.authorMargoti, G.
dc.contributor.authorAssafin, M.
dc.contributor.authorOrtiz, J. L.
dc.contributor.authorSantos-Sanz, P.
dc.contributor.authorEpinat, B.
dc.contributor.authorKervella, P.
dc.contributor.authorDesmars, J.
dc.contributor.authorVieira-Martins, R.
dc.contributor.authorKilic, Y.
dc.contributor.authorGomes Júnior, A. R. [UNESP]
dc.contributor.authorCamargo, J. I.B.
dc.contributor.authorEmilio, M.
dc.contributor.authorVara-Lubiano, M.
dc.contributor.authorKretlow, M.
dc.contributor.authorAlbert, L.
dc.contributor.authorAlcock, C.
dc.contributor.authorBall, J. G.
dc.contributor.authorBender, K.
dc.contributor.authorBuie, M. W.
dc.contributor.authorButterfield, K.
dc.contributor.authorCamarca, M.
dc.contributor.authorCastro-Chacón, J. H.
dc.contributor.authorDunford, R.
dc.contributor.authorFisher, R. S.
dc.contributor.authorGamble, D.
dc.contributor.authorGeary, J. C.
dc.contributor.authorGnilka, C. L.
dc.contributor.authorGreen, K. D.
dc.contributor.authorHartman, Z. D.
dc.contributor.authorHuang, C. K.
dc.contributor.authorJanuszewski, H.
dc.contributor.authorJohnston, J.
dc.contributor.authorKagitani, M.
dc.contributor.authorKamin, R.
dc.contributor.authorKavelaars, J. J.
dc.contributor.authorKeller, J. M.
dc.contributor.authorDe Kleer, K. R.
dc.contributor.authorLehner, M. J.
dc.contributor.authorLuken, A.
dc.contributor.authorMarchis, F.
dc.contributor.authorMarlin, T.
dc.contributor.authorMcGregor, K.
dc.contributor.authorNikitin, V.
dc.contributor.authorNolthenius, R.
dc.contributor.authorPatrick, C.
dc.contributor.authorRedfield, S.
dc.contributor.authorRengstorf, A. W.
dc.contributor.authorReyes-Ruiz, M.
dc.contributor.authorSeccull, T.
dc.contributor.authorSkrutskie, M. F.
dc.contributor.authorSmith, A. B.
dc.contributor.authorSproul, M.
dc.contributor.authorStephens, A. W.
dc.contributor.authorSzentgyorgyi, A.
dc.contributor.authorSánchez-Sanjuán, S.
dc.contributor.authorTatsumi, E.
dc.contributor.authorVerbiscer, A.
dc.contributor.authorWang, S. Y.
dc.contributor.authorYoshida, F.
dc.contributor.authorYoung, R.
dc.contributor.authorZhang, Z. W.
dc.contributor.institutionObservatório Nacional/MCTI
dc.contributor.institutionLaboratório Interinstitucional de E-Astronomia - LIneA
dc.contributor.institutionUniversidade Federal do Rio de Janeiro (UFRJ)
dc.contributor.institutionFederal University of Technology - Paraná (UTFPR-Curitiba)
dc.contributor.institutionFlorida Space Institute,UCF
dc.contributor.institutionInstituto de Astrofísica de Andalucía - Consejo Superior de Investigaciones Científicas
dc.contributor.institutionUniversity of California
dc.contributor.institutionSpace Telescope Science Institute
dc.contributor.institutionCanada-France-Hawaii Telescope
dc.contributor.institutionInstitut Polytechnique des Sciences Avancées Ipsa
dc.contributor.institutionUniv. Lille
dc.contributor.institutionAkdeniz University
dc.contributor.institutionTÜB?ITAK National Observatory
dc.contributor.institutionUniversidade Federal de Uberlândia (UFU)
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.contributor.institutionUniversidade Estadual de Ponta Grossa (UEPG)
dc.contributor.institutionInternationale Amateursternwarte (IAS) E. V.
dc.contributor.institutionInternational Occultation Timing Association - European Section (IOTA/ES)
dc.contributor.institutionUniversité de Montréal
dc.contributor.institutionHarvard-Smithsonian Center for Astrophysics
dc.contributor.institutionGemini Observatory/NSF's NOIRLab
dc.contributor.institutionCabrillo College Astronomy
dc.contributor.institutionSouthwest Research Institute
dc.contributor.institutionInternational Occultation Timing Association (IOTA)
dc.contributor.institutionCalifornia Institute of Technology
dc.contributor.institutionUniversidad Nacional Autónoma de México
dc.contributor.institutionUniversity of Oregon
dc.contributor.institutionCanCON - Canadian Collaborative Occultation Network
dc.contributor.institutionNasa Ames Research Center
dc.contributor.institutionUniversity of New Haven
dc.contributor.institutionAcademia Sinica Institute of Astronomy and Astrophysics
dc.contributor.institutionUniversity of Colorado
dc.contributor.institutionTohoku University
dc.contributor.institutionUniversity of Victoria
dc.contributor.institutionSeti Institute
dc.contributor.institutionWesleyan University
dc.contributor.institutionResearch and Education Collaborative Occultation Network
dc.contributor.institutionPurdue University Northwest
dc.contributor.institutionUniversity of Virginia
dc.contributor.institutionPrivate Observatory
dc.contributor.institutionUniversity of la Laguna
dc.contributor.institutionUniversity of Tokyo
dc.contributor.institutionSchool of Medicine Department of Basic Sciences University of Occupational and Environmental Health
dc.contributor.institutionChiba Institute of Technology
dc.contributor.institutionNaylor Observatory
dc.description.abstractContext. Quaoar is a classical trans-Neptunian object (TNO) with an area-equivalent diameter of 1100 km and an orbital semi-major axis of 43.3 astronomical units. Based on stellar occultations observed between 2018 and 2021, an inhomogeneous ring (Q1R, i.e., Quaoar's first ring) has been detected around this body. Aims. A new stellar occultation by Quaoar was observed on August 9, 2022, with the aim of improving Quaoar's shape models and the physical parameters of Q1R, while searching for additional material around the body. Methods. The occultation provided nine effective chords across Quaoar, pinning down its size, shape, and astrometric position. Large facilities, such as Gemini North and the Canada-France-Hawaii Telescope (CFHT), were used to obtain high acquisition rates and signal-to-noise ratios. The light curves were also used to characterize the Q1R ring (radial profiles and orbital elements). Results. Quaoar's elliptical fit to the occultation chords yields the limb with an apparent semi-major axis of 579.5 ± 4.0 km, apparent oblateness of 0.12 ± 0.01, and area-equivalent radius of 543 ± 2 km. Quaoar's limb orientation is consistent with Q1R and Weywot orbiting in Quaoar's equatorial plane. The orbital radius of Q1R is refined to a value of 4057 ± 6 km. The radial opacity profile of the more opaque ring profile follows a Lorentzian shape that extends over 60 km, with a full width at half maximum (FWHM) of ?5 km and a peak normal optical depth of 0.4. Besides the secondary events related to the already reported rings, new secondary events detected during the August 2022 occultation in three different data sets are consistent with another ring around Quaoar with a radius of 2520 ± 20 km, assuming the ring is circular and co-planar with Q1R. This new ring has a typical width of 10 km and a normal optical depth of ?0.004. Just as Q1R, it also lies outside Quaoar's classical Roche limit.en
dc.description.affiliationObservatório Nacional/MCTI, R. General José Cristino 77, RJ
dc.description.affiliationLaboratório Interinstitucional de E-Astronomia - LIneA, RJ
dc.description.affiliationUniversité Psl Lesia Observatoire de Paris Cnrs
dc.description.affiliationUniversidade Federal Do Rio de Janeiro - Observatório Do Valongo, Ladeira Pedro Antônio 43, RJ
dc.description.affiliationFederal University of Technology - Paraná (UTFPR-Curitiba), Rua Sete de Setembro, 3165, PR
dc.description.affiliationFlorida Space Institute,UCF, 12354 Research Parkway, Partnership 1 Building, Room 211
dc.description.affiliationInstituto de Astrofísica de Andalucía - Consejo Superior de Investigaciones Científicas, Glorieta de la Astronomía S/N
dc.description.affiliationDepartments of Astronomy and of Earth and Planetary Science University of California, 501, Campbell Hall
dc.description.affiliationDepartment of Mathematics University of Namur NaXys, Rue de Bruxelles 61
dc.description.affiliationLaboratoire Lagrange Université Côte d'Azur Observatoire de la Côte d'Azur Cnrs, Bd de l'Observatoire, CS 34229
dc.description.affiliationSpace Telescope Science Institute
dc.description.affiliationLam (Laboratoire d'Astrophysique de Marseille) Umr 7326 Aix Marseille Université CNRS Cnes
dc.description.affiliationCanada-France-Hawaii Telescope, 65-1238 Mamalahoa Highway
dc.description.affiliationInstitut Polytechnique des Sciences Avancées Ipsa, 63 boulevard de Brandebourg
dc.description.affiliationPsl Research University Institut de Mécanique Céleste et de Calcul des ÉPhémérides Sorbonne Universités IMCCE Observatoire de Paris CNRS Upmc Univ Paris 06 Univ. Lille
dc.description.affiliationDepartment of Space Sciences and Technologies Faculty of Sciences Akdeniz University
dc.description.affiliationTÜB?ITAK National Observatory, Akdeniz University Campus
dc.description.affiliationInstitute of Physics Federal University of Uberlândia, MG
dc.description.affiliationGrupo de Dinâmica Orbital e Planetologia Unesp - São Paulo State University, SP
dc.description.affiliationUniversidade Estadual de Ponta Grossa O.A. - Degeo, PR
dc.description.affiliationInternationale Amateursternwarte (IAS) E. V., Mittelstr. 6
dc.description.affiliationInternational Occultation Timing Association - European Section (IOTA/ES), Am Brombeerhag 13
dc.description.affiliationDépartement de Physique and Observatoire du Mont-Mégantic Succ. Centre-ville Université de Montréal, C.P. 6128
dc.description.affiliationInstitut Trottier de Recherche sur les Exoplanètes Université de Montréal
dc.description.affiliationHarvard-Smithsonian Center for Astrophysics, 60 Garden Street
dc.description.affiliationGemini Observatory/NSF's NOIRLab
dc.description.affiliationCabrillo College Astronomy
dc.description.affiliationSouthwest Research Institute, 1050 Walnut Street, Suite 300
dc.description.affiliationInternational Occultation Timing Association (IOTA)
dc.description.affiliationCalifornia Institute of Technology, 1200 E California Blvd
dc.description.affiliationInstituto de Astronomía Universidad Nacional Autónoma de México, AP 106,BC
dc.description.affiliationUniversity of Oregon
dc.description.affiliationCanCON - Canadian Collaborative Occultation Network
dc.description.affiliationNasa Ames Research Center
dc.description.affiliationDept. of Mathematics and Physics University of New Haven, 300 Boston Post Road
dc.description.affiliationAcademia Sinica Institute of Astronomy and Astrophysics, 11F of AS/NTU Astronomy-Mathematics Building No.1, Sec. 4, Roosevelt Road, ROC
dc.description.affiliationUniversity of Colorado, 2000 Colorado Avenue
dc.description.affiliationPlanetary Plasma and Atmospheric Research Center Graduate School of Science Tohoku University, 6-3 Aramaki -aza-aoba, Aoba-ku
dc.description.affiliationDepartment of Physics and Astronomy University of Victoria, Building, 3800 Finnerty Road, Victoria
dc.description.affiliationUnistellar, 5 allée Marcel Leclerc, bâtiment B
dc.description.affiliationCarl Sagan Center Seti Institute, Suite 200, 339 Bernardo Avenue
dc.description.affiliationAstronomy Department and Van Vleck Observatory Wesleyan University
dc.description.affiliationResearch and Education Collaborative Occultation Network
dc.description.affiliationDepartment of Chemistry and Physics Purdue University Northwest
dc.description.affiliationDepartment of Astronomy University of Virginia, PO Box 400325
dc.description.affiliationPrivate Observatory
dc.description.affiliationInstituto de Astrofísica de Canarias University of la Laguna
dc.description.affiliationDept. Earth and Planetary Science University of Tokyo
dc.description.affiliationSchool of Medicine Department of Basic Sciences University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahata
dc.description.affiliationPlanetary Exploration Research Center Chiba Institute of Technology, 2-17-1 Tsudanuma, Chiba
dc.description.affiliationNaylor Observatory
dc.description.affiliationNasa Exoplanet Science Institute Caltech/IPAC, Mail Code 100- 22
dc.description.affiliationUnespGrupo de Dinâmica Orbital e Planetologia Unesp - São Paulo State University, SP
dc.identifier.citationAstronomy and Astrophysics, v. 673.
dc.relation.ispartofAstronomy and Astrophysics
dc.subjectKuiper belt objects: individual: Quaoar
dc.subjectMethods: data analysis
dc.subjectMethods: observational
dc.subjectPlanets and satellites: rings
dc.subjectTechniques: photometric
dc.titleThe two rings of (50000) Quaoaren
dc.typeArtigo 0000-0003-1000-8113[1] 0000-0003-0088-1808 0000-0003-0088-1808[3] 0000-0003-2311-2438 0000-0003-2311-2438[4] 0000-0003-4058-0815 0000-0003-4058-0815 0000-0003-4058-0815[6][7][9] 0000-0002-8211-0777[10][11][12] 0000-0002-2470-5756[13][14] 0000-0002-2193-8204[15] 0000-0003-1690-5704[16] 0000-0001-8641-0796[17] 0000-0002-3362-2127 0000-0002-3362-2127[18] 0000-0002-1642-4065[19] 0000-0003-0475-9375[23][24][30][32][36][38][43][45][46] 0000-0001-7016-7277[48][50][54][55][56][57][60][61][62][63] 0000-0002-6142-9842[64][65] 0000-0002-3286-911X[67]