Reference : A Pluto-like radius and a high albedo for the dwarf planet Eris from an occultation
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
http://hdl.handle.net/2268/107675
A Pluto-like radius and a high albedo for the dwarf planet Eris from an occultation
English
Sicardy, B. [LESIA-Observatoire de Paris, CNRS, Université Pierre et Marie Curie, Université Paris-Diderot, 11, Rue Marcelin Berthelot, 92195 Meudon cedex, France]
Ortiz, J. L. [Instituto de Astrofísica de Andalucía, CSIC, Apartado 3004, 18080 Granada, Spain]
Assafin, M. [Observatório do Valongo/UFRJ, Ladeira Pedro Antonio 43, CEP 20.080-090 Rio de Janeiro, RJ, Brazil]
Jehin, Emmanuel mailto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique et traitement de l'image]
Maury, A. [San Pedro de Atacama Celestial Explorations, Casilla 21, San Pedro de Atacama, Chile]
Lellouch, E. [LESIA-Observatoire de Paris, CNRS, Université Pierre et Marie Curie, Université Paris-Diderot, 11, Rue Marcelin Berthelot, 92195 Meudon cedex, France]
Hutton, R Gil [Complejo Astronómico El Leoncito (CASLEO) and San Juan National University, Avenida España 1512 sur, J5402DSP, San Juan, Argentina]
Braga-Ribas, F. [LESIA-Observatoire de Paris, CNRS, Université Pierre et Marie Curie, Université Paris-Diderot, 11, Rue Marcelin Berthelot, 92195 Meudon cedex, France]
Colas, F. [IMCCE-Observatoire de Paris, CNRS, Université Pierre et Marie Curie, Université Lille 1, 77 Avenue Denfert-Rochereau, 75014 Paris, France]
Hestroffer, D. [IMCCE-Observatoire de Paris, CNRS, Université Pierre et Marie Curie, Université Lille 1, 77 Avenue Denfert-Rochereau, 75014 Paris, France]
Lecacheux, J. [LESIA-Observatoire de Paris, CNRS, Université Pierre et Marie Curie, Université Paris-Diderot, 11, Rue Marcelin Berthelot, 92195 Meudon cedex, France]
Roques, F. [LESIA-Observatoire de Paris, CNRS, Université Pierre et Marie Curie, Université Paris-Diderot, 11, Rue Marcelin Berthelot, 92195 Meudon cedex, France]
Santos-Sanz, P. [LESIA-Observatoire de Paris, CNRS, Université Pierre et Marie Curie, Université Paris-Diderot, 11, Rue Marcelin Berthelot, 92195 Meudon cedex, France]
Widemann, T. [LESIA-Observatoire de Paris, CNRS, Université Pierre et Marie Curie, Université Paris-Diderot, 11, Rue Marcelin Berthelot, 92195 Meudon cedex, France]
Morales, N. [Instituto de Astrofísica de Andalucía, CSIC, Apartado 3004, 18080 Granada, Spain]
Duffard, R. [Instituto de Astrofísica de Andalucía, CSIC, Apartado 3004, 18080 Granada, Spain]
Thirouin, A. [Instituto de Astrofísica de Andalucía, CSIC, Apartado 3004, 18080 Granada, Spain]
Castro-Tirado, A. J. [Instituto de Astrofísica de Andalucía, CSIC, Apartado 3004, 18080 Granada, Spain]
Jelínek, M. [Instituto de Astrofísica de Andalucía, CSIC, Apartado 3004, 18080 Granada, Spain]
Kubánek, P. [Instituto de Astrofísica de Andalucía, CSIC, Apartado 3004, 18080 Granada, Spain]
Sota, A. [Instituto de Astrofísica de Andalucía, CSIC, Apartado 3004, 18080 Granada, Spain]
Sánchez-Ramírez, R. [Instituto de Astrofísica de Andalucía, CSIC, Apartado 3004, 18080 Granada, Spain]
Andrei, A. H. [Observatório do Valongo/UFRJ, Ladeira Pedro Antonio 43, CEP 20.080-090 Rio de Janeiro, RJ, Brazil]
Camargo, J. I. B. [Observatório do Valongo/UFRJ, Ladeira Pedro Antonio 43, CEP 20.080-090 Rio de Janeiro, RJ, Brazil]
da Silva Neto, D. N. [Observatório Nacional/MCT, Rua General José Cristino 77, CEP 20921-400 Rio de Janeiro, RJ, Brazil]
Gomes, A Ramos [Observatório do Valongo/UFRJ, Ladeira Pedro Antonio 43, CEP 20.080-090 Rio de Janeiro, RJ, Brazil]
Martins, R Vieira [Observatório do Valongo/UFRJ, Ladeira Pedro Antonio 43, CEP 20.080-090 Rio de Janeiro, RJ, Brazil]
Gillon, Michaël mailto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique et traitement de l'image]
Manfroid, Jean mailto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Département d'astrophys., géophysique et océanographie (AGO)]
Tozzi, G. P. [INAF, Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, I-50125 Firenze, Italy]
Harlingten, C. [Caisey Harlingten Observatory, The Grange, Scarrow Beck Road, Erpingham, Norfolk NR11 7QX, UK]
Saravia, S. [San Pedro de Atacama Celestial Explorations, Casilla 21, San Pedro de Atacama, Chile]
Behrend, R. [Observatoire de Genève, CH-1290 Sauverny, Switzerland]
Mottola, S. [DLR - German Aerospace Center, Rutherfordstrasse 2, 12489 Berlin, Germany]
Melendo, E García [Fundació Privada Observatori Esteve Duran, 08553 Seva, Spain]
Peris, V. [Observatori Astronòmic, Universitat de València, Calle Catedràtic José Beltrán 2, 46980 Paterna, Spain]
Fabregat, J. [Observatori Astronòmic, Universitat de València, Calle Catedràtic José Beltrán 2, 46980 Paterna, Spain]
Madiedo, J. M. [Universidad de Huelva, Facultad de Ciencias Experimentales, Avenida de las Fuerzas Armadas S/N, 21071 Huelva, Spain]
Cuesta, L. [Centro de Astrobiología (CSIC-INTA), Carretera de Ajalvir, km 4, 28850 Torrejón de Ardoz, Madrid, Spain]
Eibe, M. T. [Centro de Astrobiología (CSIC-INTA), Carretera de Ajalvir, km 4, 28850 Torrejón de Ardoz, Madrid, Spain]
Ullán, A. [Centro de Astrobiología (CSIC-INTA), Carretera de Ajalvir, km 4, 28850 Torrejón de Ardoz, Madrid, Spain]
Organero, F. [Observatorio astronómico de La Hita, 45840 La Puebla de Almoradiel (Toledo), Spain]
Pastor, S. [Observatorio de la Murta, 30153 Murcia, Spain]
de Los Reyes, J. A. [Observatorio de la Murta, 30153 Murcia, Spain]
Pedraz, S. [Calar Alto Observatory, Centro Astronómico Hispano Alemán, Calle Jesús Durbán Remón, 2, 04004 Almería, Spain]
Castro, A. [Sociedad Malagueña de Astronomía, Centro Cultural José María Gutiérrez Romero, Calle República Argentina 9, 29016 Málaga, Spain]
de La Cueva, I. [Astroimagen, Abad y Lasierra 58Bis, 07800 Ibiza, Spain]
Muler, G. [Observatorio Nazaret, 35539 Nazaret, Lanzarote, Spain]
Steele, I. A. [Liverpool JMU, Twelve Quays House, Egerton Wharf, Birkenhead CH41 1LD, UK]
Cebrián, M. [Instituto de Astrofísica de Canarias, Vía Láctea s/n, 38205 La Laguna, Tenerife, Spain]
Montañés-Rodríguez, P. [Instituto de Astrofísica de Canarias, Vía Láctea s/n, 38205 La Laguna, Tenerife, Spain]
Oscoz, A. [Instituto de Astrofísica de Canarias, Vía Láctea s/n, 38205 La Laguna, Tenerife, Spain]
Weaver, D. [Observatório Astronomico Christus, Colégio Christus, Rua João Carvalho 630, Aldeota, CEP 60140140, Fortaleza, CE, Brazil]
Jacques, C. [Observatório CEAMIG-REA, CEP31545-120, Belo Horizonte, MG, Brazil]
Corradi, W. J. B. [Departamento de Física - Instituto de Ciências Exatas - Universidade Federal de Minas Gerais, Avenida Antônio Carlos 6627, 31270-901 Belo Horizonte, MG, Brazil]
Santos, F. P. [Departamento de Física - Instituto de Ciências Exatas - Universidade Federal de Minas Gerais, Avenida Antônio Carlos 6627, 31270-901 Belo Horizonte, MG, Brazil]
Reis, W. [Departamento de Física - Instituto de Ciências Exatas - Universidade Federal de Minas Gerais, Avenida Antônio Carlos 6627, 31270-901 Belo Horizonte, MG, Brazil]
Milone, A. [Instituto Nacional de Pesquisas Espaciais (INPE-MCT), Divisão de Astrofísica, Avenida dos Astronautas, 1758, São José dos Campos, 12227-010, SP, Brazil]
Emilio, M. [Universidade Estadual de Ponta Grossa, O.A. - DEGEO, Avenida Carlos Cavalcanti 4748, Ponta Grossa 84030-900, PR, Brazil]
Gutiérrez, L. [Instituto de Astronomía, Universidad Nacional Autónoma de México, Carretera Tijuana-Ensenada, km 103, 22860 Ensenada, BC, Mexico]
Vazquez Sabariego, Ruth [> > > >]
Hernández-Toledo, H. [Instituto de Astronomía, Universidad Nacional Autónoma de México, Apartado Postal 70-264, 04510 México DF, Mexico]
1-Oct-2011
Nature
Nature Publishing Group
478
493-496
Yes (verified by ORBi)
International
0028-0836
1476-4687
Basingstoke
United Kingdom
[en] The dwarf planet Eris is a trans-Neptunian object with an orbital eccentricity of 0.44, an inclination of 44 degrees and a surface composition very similar to that of Pluto. It resides at present at 95.7 astronomical units (1AU is the Earth-Sun distance) from Earth, near its aphelion and more than three times farther than Pluto. Owing to this great distance, measuring its size or detecting a putative atmosphere is difficult. Here we report the observation of a multi-chord stellar occultation by Eris on 6 November 2010 UT. The event is consistent with a spherical shape for Eris, with radius 1,163+/-6kilometres, density 2.52+/-0.05 grams per cm[SUP]3[/SUP] and a high visible geometric albedo, . No nitrogen, argon or methane atmospheres are detected with surface pressure larger than ~1nanobar, about 10,000 times more tenuous than Pluto's present atmosphere. As Pluto's radius is estimated to be between 1,150 and 1,200 kilometres, Eris appears as a Pluto twin, with a bright surface possibly caused by a collapsed atmosphere, owing to its cold environment. We anticipate that this atmosphere may periodically sublimate as Eris approaches its perihelion, at 37.8 astronomical units from the Sun.
Researchers
http://hdl.handle.net/2268/107675
10.1038/nature10550
http://adsabs.harvard.edu/abs/2011Natur.478..493S

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