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The size, shape, density and ring of the dwarf planet Haumea from a stellar occultation

Ortiz, J. L. and Santos-Sanz, P. and Sicardy, B. and Benedetti-Rossi, G. and Bérard, D. and Morales, N. and Duffard, R. and Braga-Ribas, F. and Hopp, U. and Ries, C. and Nascimbeni, V. and Marzari, F. and Granata, V. and Pal, A. and Kiss, C. and Pribulla, T. and Komžík, R. and Hornoch, K. and Pravec, P. and Bacci, P. and Maestripieri, M. and Nerli, L. and Mazzei, L. and Bachini, M. and Martinelli, F. and Succi, G. and Ciabattari, F. and Mikuz, H. and Carbognani, A. and Gaehrken, B. and Mottola, Stefano and Hellmich, Stephan and Rommel, F. L. and Fernández-Valenzuela, E. and Bagatin, A. Campo and Cikota, S. and Cikota, A. and Lecacheux, J. and Vieira-Martins, R. and Camargo, J. I. B. and Assafin, M. and Colas, F. and Behrend, R. and Desmars, J. and Meza, E. and Alvarez-Candal, A. and Beisker, W. and Gomes-Junior, A. R. and Morgado, B. E. and Roques, F. and Vachier, F. and Berthier, J. and Mueller, T. G. and Madiedo, J. M. and Unsalan, O. and Sonbas, E. and Karaman, N. and Erece, O. and Koseoglu, D. T. and Ozisik, T. and Kalkan, S. and Guney, Y. and Niaei, M. S. and Satir, O. and Yesilyaprak, C. and Puskullu, C. and Kabas, A. and Demircan, O. and Alikakos, J. and Charmandaris, V. and Leto, G. and Ohlert, J. and Christille, J. M. and Szakáts, R. and Farkas, A. Takácsné and Varga-Verebélyi, E. and Marton, G. and Marciniak, A. and Bartczak, P. and Santana-Ros, T. and Butkiewicz-Bąk, M. and Dudziński, G. and Alí-Lagoa, V. and Gazeas, K. and Tzouganatos, L. and Paschalis, N. and Tsamis, V. and Sánchez-Lavega, A. and Pérez-Hoyos, S. and Hueso, R. and Guirado, J. C. and Peris, V. and Iglesias-Marzoa, R. (2017) The size, shape, density and ring of the dwarf planet Haumea from a stellar occultation. Nature, 550 (7675), pp. 219-223. Nature Publishing Group. DOI: 10.1038/nature24051 ISSN 0028-0836

Full text not available from this repository.

Official URL: http://dx.doi.org/10.1038/nature24051

Abstract

Haumea—one of the four known trans-Neptunian dwarf planets—is a very elongated and rapidly rotating body. In contrast to other dwarf planets, its size, shape, albedo and density are not well constrained. The Centaur Chariklo was the first body other than a giant planet known to have a ring system, and the Centaur Chiron was later found to possess something similar to Chariklo’s rings. Here we report observations from multiple Earth-based observatories of Haumea passing in front of a distant star (a multi-chord stellar occultation). Secondary events observed around the main body of Haumea are consistent with the presence of a ring with an opacity of 0.5, width of 70 kilometres and radius of about 2,287 kilometres. The ring is coplanar with both Haumea’s equator and the orbit of its satellite Hi’iaka. The radius of the ring places it close to the 3:1 mean-motion resonance with Haumea’s spin period—that is, Haumea rotates three times on its axis in the time that a ring particle completes one revolution. The occultation by the main body provides an instantaneous elliptical projected shape with axes of about 1,704 kilometres and 1,138 kilometres. Combined with rotational light curves, the occultation constrains the three-dimensional orientation of Haumea and its triaxial shape, which is inconsistent with a homogeneous body in hydrostatic equilibrium. Haumea’s largest axis is at least 2,322 kilometres, larger than previously thought, implying an upper limit for its density of 1,885 kilograms per cubic metre and a geometric albedo of 0.51, both smaller than previous estimates. In addition, this estimate of the density of Haumea is closer to that of Pluto than are previous estimates, in line with expectations. No global nitrogen- or methane-dominated atmosphere was detected.

Item URL in elib:https://elib.dlr.de/116443/
Document Type:Article
Title:The size, shape, density and ring of the dwarf planet Haumea from a stellar occultation
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Ortiz, J. L.Instituto de Astrofísica de AndalucíaUNSPECIFIED
Santos-Sanz, P.Instituto de Astrofísica de AndalucíaUNSPECIFIED
Sicardy, B.observatoire de paris, meudon, franceUNSPECIFIED
Benedetti-Rossi, G.Observatório Nacional/MCTICUNSPECIFIED
Bérard, D.observatoire de paris, meudon, franceUNSPECIFIED
Morales, N.instituto de astrofısica de andalucıaUNSPECIFIED
Duffard, R.instituto de astrofısica de andalucıaUNSPECIFIED
Braga-Ribas, F.Observatório Nacional/MCTICUNSPECIFIED
Hopp, U.Universitäts-Sternwarte MünchenUNSPECIFIED
Ries, C.Universitäts-Sternwarte MünchenUNSPECIFIED
Nascimbeni, V.Dipartimento di Fisica e AstronomiaUNSPECIFIED
Marzari, F.dipartimento di fisica e astronomia “g. galilei”, university of padova, vic. osservatorio 3, 35122 padova, italyUNSPECIFIED
Granata, V.Dipartimento di Fisica e AstronomiaUNSPECIFIED
Pal, A.konkoly observatoryUNSPECIFIED
Kiss, C.konkoly observatoryUNSPECIFIED
Pribulla, T.astronomical institute, slovak academy of sciencesUNSPECIFIED
Komžík, R.astronomical institute, slovak academy of sciencesUNSPECIFIED
Hornoch, K.astronomical institute, academy of sciences of the czech republic, fricova 1, cz-25165 ondrejov, czech republicUNSPECIFIED
Pravec, P.astronomical institute, academy of sciences of the czech republic, fricova 1, cz-25165 ondrejov, czech republicUNSPECIFIED
Bacci, P.Astronomical Observatory San Marcello PistoieseUNSPECIFIED
Maestripieri, M.Astronomical Observatory San Marcello PistoieseUNSPECIFIED
Nerli, L.Astronomical Observatory San Marcello PistoieseUNSPECIFIED
Mazzei, L.Astronomical Observatory San Marcello PistoieseUNSPECIFIED
Bachini, M.Osservatorio astronomico di Tavolaia,UNSPECIFIED
Martinelli, F.Lajatico Astronomical Centre,UNSPECIFIED
Succi, G.Osservatorio astronomico di Tavolaia,UNSPECIFIED
Ciabattari, F.Osservatorio Astronomico di Monte AglialeUNSPECIFIED
Mikuz, H.Cni Vrh ObservatoryUNSPECIFIED
Carbognani, A.astronomical observatory of the autonomous region of the aosta valley, loc. lignan 39, 11020 nus (aosta), italyUNSPECIFIED
Gaehrken, B.Bayerische Volkssternwarte MünchenUNSPECIFIED
Mottola, StefanoStefano.Mottola (at) dlr.deUNSPECIFIED
Hellmich, StephanStephan.Hellmich (at) dlr.deUNSPECIFIED
Rommel, F. L.Federal University of Technology-ParanáUNSPECIFIED
Fernández-Valenzuela, E.Instituto de Astrofísica de AndalucíaUNSPECIFIED
Bagatin, A. CampoDepartamento de Física, Ingeniería de Sistemas y Teoría de la Señal, Universidad de AlicanteUNSPECIFIED
Cikota, S.University of Zagreb, Faculty of Electrical Engineering and ComputingUNSPECIFIED
Cikota, A.European Southern ObservatoryUNSPECIFIED
Lecacheux, J.LESIA, Observatoire de ParisUNSPECIFIED
Vieira-Martins, R.Observatório Nacional/MCTICUNSPECIFIED
Camargo, J. I. B.Observatório Nacional/MCTIC,UNSPECIFIED
Assafin, M.observatório do valongo/ufrj, ladeira pedro antonio 43, 20080-090 rio de janeiro, brazilUNSPECIFIED
Colas, F.IMCCE/Observatoire de ParisUNSPECIFIED
Behrend, R.observatoire de geneve, switzerlandUNSPECIFIED
Desmars, J.LESIA, Observatoire de ParisUNSPECIFIED
Meza, E.LESIA, Observatoire de ParisUNSPECIFIED
Alvarez-Candal, A.Observatório Nacional/MCTICUNSPECIFIED
Beisker, W.International Occultation Timing Association—European Section (IOTA-ESUNSPECIFIED
Gomes-Junior, A. R.Observatório do Valongo/UFRJUNSPECIFIED
Morgado, B. E.Observatório Nacional/MCTICUNSPECIFIED
Roques, F.LESIA, Observatoire de ParisUNSPECIFIED
Vachier, F.IMCCE/Observatoire de ParisUNSPECIFIED
Berthier, J.IMCCE/Observatoire de ParisUNSPECIFIED
Mueller, T. G.Max-Planck-Institut für Extraterrestrische PhysikUNSPECIFIED
Madiedo, J. M.Facultad de Ciencias ExperimentalesUNSPECIFIED
Unsalan, O.Ege University, Faculty of ScienceUNSPECIFIED
Sonbas, E.University of AdiyamanUNSPECIFIED
Karaman, N.University of AdiyamanUNSPECIFIED
Erece, O.TUBITAK National Observatory (TUG)UNSPECIFIED
Koseoglu, D. T.TUBITAK National Observatory (TUG)UNSPECIFIED
Ozisik, T.TUBITAK National Observatory (TUG)UNSPECIFIED
Kalkan, S.Ondokuz Mayis University ObservatoryUNSPECIFIED
Guney, Y.Atatürk University, Science FacultyUNSPECIFIED
Niaei, M. S.Atatürk UniversityUNSPECIFIED
Satir, O.Atatürk UniversityUNSPECIFIED
Yesilyaprak, C.Atatürk UniversityUNSPECIFIED
Puskullu, C.Canakkale Onsekiz Mart UniversityUNSPECIFIED
Kabas, A.Canakkale Onsekiz Mart UniversityUNSPECIFIED
Demircan, O.Canakkale Onsekiz Mart UniversityUNSPECIFIED
Alikakos, J.Institute for Astronomy, Astrophysics, Space Applications and Remote SensingUNSPECIFIED
Charmandaris, V.Institute for Astronomy, Astrophysics, Space Applications and Remote SensingUNSPECIFIED
Leto, G.INAF—Catania Astrophysical Observatory,UNSPECIFIED
Ohlert, J.Michael Adrian ObservatoriumUNSPECIFIED
Christille, J. M.Astronomical Observatory of the Autonomous Region of the Aosta Valley (OAVdA)UNSPECIFIED
Szakáts, R.konkoly observatoryUNSPECIFIED
Farkas, A. Takácsnékonkoly observatoryUNSPECIFIED
Varga-Verebélyi, E.konkoly observatoryUNSPECIFIED
Marton, G.konkoly observatoryUNSPECIFIED
Marciniak, A.astronomical observatory institute, faculty of physics, a. mickiewicz university, słoneczna 36, 60-286 poznań, polandUNSPECIFIED
Bartczak, P.astronomical observatory institute, faculty of physics, a. mickiewicz university, słoneczna 36, 60-286 poznań, polandUNSPECIFIED
Santana-Ros, T.astronomical observatory institute, faculty of physics, a. mickiewicz university, słoneczna 36, 60-286 poznań, polandUNSPECIFIED
Butkiewicz-Bąk, M.astronomical observatory institute, faculty of physics, a. mickiewicz university, słoneczna 36, 60-286 poznań, polandUNSPECIFIED
Dudziński, G.astronomical observatory institute, faculty of physics, a. mickiewicz university, słoneczna 36, 60-286 poznań, polandUNSPECIFIED
Alí-Lagoa, V.Max-Planck-Institut für Extraterrestrische PhysikUNSPECIFIED
Gazeas, K.Section of Astrophysics, Astronomy and Mechanics, Department of PhysicsUNSPECIFIED
Tzouganatos, L.Section of Astrophysics, Astronomy and Mechanics, Department of PhysicsUNSPECIFIED
Paschalis, N.Nunki ObservatoryUNSPECIFIED
Tsamis, V.Ellinogermaniki Agogi ObservatoryUNSPECIFIED
Sánchez-Lavega, A.Departamento de Física Aplicada IUNSPECIFIED
Pérez-Hoyos, S.Departamento de Física Aplicada IUNSPECIFIED
Hueso, R.Departamento de Física Aplicada IUNSPECIFIED
Guirado, J. C.Observatori Astronòmic de la Universitat de ValènciaUNSPECIFIED
Peris, V.Observatori Astronòmic de la Universitat de ValènciaUNSPECIFIED
Iglesias-Marzoa, R.Centro de Estudios de Física del Cosmos de AragónUNSPECIFIED
Date:October 2017
Journal or Publication Title:Nature
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:550
DOI :10.1038/nature24051
Page Range:pp. 219-223
Publisher:Nature Publishing Group
ISSN:0028-0836
Status:Published
Keywords:Asteroid, dwarf planet, size, shape, density, ring, Trans Neptunian Object, stellar occultation
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Science and Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Erforschung des Weltraums
DLR - Research theme (Project):R - Vorhaben Exploration des Sonnensystems
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Asteroids and Comets
Deposited By: Hellmich, Stephan
Deposited On:01 Dec 2017 09:00
Last Modified:08 Mar 2018 18:47

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