| Texto completo | |
| Autor(es): Mostrar menos - |
Morgado, B. E.
[1, 2, 3]
;
Sicardy, B.
[1]
;
Braga-Ribas, F.
[1, 2, 3, 4]
;
Desmars, J.
[5, 1, 6]
;
Gomes-Junior, A. R.
[2, 7]
;
Berard, D.
[1]
;
Leiva, R.
[8, 1, 9]
;
Ortiz, J. L.
[10]
;
Vieira-Martins, R.
[11, 2, 3]
;
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.
[11, 2]
;
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]
;
Fernandez-Valenzuela, E.
[15]
;
Amaral, L. S.
[10, 16]
;
Amarante, A.
[10, 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.
[28, 3]
;
Erickson, C.
[29]
;
Evans, R.
[20]
;
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]
;
Jorgensen, U. G.
[39]
;
Kerr, S.
[40, 33]
;
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]
Número total de Autores: 81
|
| Afiliação do(s) autor(es): Mostrar menos - | [1] Univ Paris Diderot, Sorbonne Univ, Univ PSL, Observ Paris, LESIA, CNRS, Sorbonne Paris Cite, 5 Pl Jules Janssen, F-92195 Meudon - France
[2] Lab Interinst & Astron LIneA, Rua Gal Jose Cristino 77, BR-20921400 Rio De Janeiro - Brazil
[3] Observ Nacl MCTI, R Gen Jose Cristino 77, BR-20921400 Rio De Janeiro - Brazil
[4] Fed Univ Technol Parana UTFPR DAFIS, Rua Sete Setembro 3165, BR-80230901 Curitiba, PR - Brazil
[5] Inst Polytech Sci Avancees IPSA, 63 Blvd Brandebourg, F-94200 Ivry - France
[6] Univ Lille, UPMC Univ Paris 06, Inst Mecan Celeste & Calcul Ephemerides, Observ Paris, PSL Res Univ, CNRS, Sorbonne Univ, IMCC, Av Denfert Rochereau, F-75014 Paris - France
[7] UNESP Sao Paulo State Univ, Grupo Dinam Orbital & Planetol, BR-12516410 Guaratingueta, SP - Brazil
[8] Univ Chile, Dept Astron, Camino Observ 1515, Santiago - Chile
[9] Univ Cote Azur, Observ Cote Azur, Lab Lagrange, CNRS, Bd Observ, CS 34229, F-06304 Nice 4 - France
[10] IAA CSIC, Inst Astrofis Andalucia, Glorieta Astron S-N, Granada 18008 - Spain
[11] Univ Fed Rio de Janeiro, Observ Valongo, Ladeira Pedro Antonio 43, BR-20080090 Rio De Janeiro, RJ - Brazil
[12] Int Occultat Timing Assoc, European Sect, Brombeerhag 13, D-30459 Hannover - Germany
[13] Int Amateursternwarte eV IAS, Mittelstr 6, D-15749 Mittenwalde - Germany
[14] Univ Edinburgh, Royal Observ, Inst Astron, Edinburgh EH9 3HJ, Midlothian - Scotland
[15] Univ Cent Florida, Florida Space Inst, 12354 Res Pkwy, Partnership 1, Orlando, FL 32816 - USA
[16] BRAMON Brazilian Meteor Observat Network, Nhandeara - Brazil
[17] State Univ Mato Grosso Sul UEMS, Grupo Matemat Aplicada & Processamento Sinais, BR-79540000 Cassilandia, MS - Brazil
[18] Univ Nacl Cordoba, CONICET, IATE OAC, Laprida 854, X5000 BGR, Cordoba - Argentina
[19] North West Univ, Ctr Space Res, ZA-2520 Potchefstroom - South Africa
[20] Univ Namibia, Dept Phys Chem & Mat Sci, Private Bag 13301, Windhoek - Namibia
[21] Observ Midi Pyrenees, Assoc T60, 14 Ave Edouard Belin, F-31400 Toulouse - France
[22] Southwest Res Inst, 1050 Walnut St, Suite 300, Boulder, CO 80302 - USA
[23] SMPW Q25 CJ1 LT10B, Dogsheaven Observ, Brasilia, DF - Brazil
[24] Assoc Argentine Observ Minor Bodies AOACM, Buenos Aires, DF - Argentina
[25] Univ Antofagasta, Ctr Astron CITEVA, Av Angamos 601, Antofagasta - Chile
[26] Ciel & Espace, Paris - France
[27] Univ St Andrews, Ctr Exoplanet Sci, SUPA Sch Phys & Astron, St Andrews KY16 9SS, Fife - Scotland
[28] Univ Estadual Ponta Grossa UEPG, Ponta Grossa, Parana - Brazil
[29] Summit Kinetics Inc, Summit, NJ - USA
[30] Panamanian Observ San Pedro de Atacama OPSPA, San Pedro De Atacama - Chile
[31] Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055 - Peoples R China
[32] Ctr Brasileiro Pesquisas Fis, Rua Dr Xavier Sigaud 150, BR-22290180 Rio De Janeiro - Brazil
[33] TransTasman Occultat Alliance TTOA, POB 3181, Wellington - New Zealand
[34] Assoc Reunionnaise Etud Ciel Austral ARECA, St Marie, Reunion - France
[35] Chungnam Natl Univ, Dept Astron & Space Sci, Daejeon 34134 - South Korea
[36] Nicolaus Copernicus Univ, Inst Astron, Fac Phys Astron & Informat, Grudziadzka 5, PL-87100 Torun - Poland
[37] Observ SONEAR, Oliveira - Brazil
[38] Univ Liege, STAR Inst, Allee 6 Aout, 19C, B-4000 Liege - Belgium
[39] Niels Bohr Inst, Ctr ExoLife Sci CELS, Oster Voldgade 5, DK-1350 Copenhagen - Denmark
[40] Astron Assoc Queensland, 5 Curtis St, Pimpama, Qld 4209 - Australia
[41] Univ N Carolina, Dept Phys & Astron, Chapel Hill, NC 27515 - USA
[42] Russian Acad Sci, Cent Pulkovo Observ, 65-1 Pulkovskoye Ave, St Petersburg 196140 - Russia
[43] Lowell Observ, 1400 W Mars Hill Rd, Flagstaff, AZ 86001 - USA
[44] MIT, Dept Earth Atmospher & Planetary Sci, 77 Massachusetts Ave, Cambridge, MA 02139 - USA
[45] Astron Res Inst, Ashmore, IL - USA
[46] NASA, Johnson Space Ctr Astron Soc, Houston, TX - USA
[47] Int Occultat Timing Assoc, POB 7152, Topeka, KS 98042 - USA
[48] Univ Estadual Oeste Parana Unioeste, Ave Tarquinio Joslin Santos 1300, BR-85870650 Foz Do Iguacu, PR - Brazil
[49] Polo Astron Casimiro Montenegro Filho FPTI BR, Ave Tancredo Neves 6731, BR-85867900 Foz Do Iguacu, PR - Brazil
[50] San Pedro Atacama Celestial Explorat SPACE, San Pedro De Atacama - Chile
[51] Comis Nacl Invest & Desarrollo Aeroesp Peru CONID, Luis Felipe Villaran 1069, Lima - Peru
[52] Observ Astron Moquegua, CP Cambrune, Carumas, Moquegua - Peru
[53] Appalachian State Univ, Dept Phys & Astron, Boone, NC 28608 - USA
[54] Astrocan Clube Astron Nhandeara, Nhandeara - Brazil
[55] Katholieke Univ Leuven, Dept Math, Ctr Math Plasma Astrophys, Celestijnenlaan 200B, B-3001 Leuven - Belgium
[56] Open Univ, Dept Phys Sci, Ctr Elect Imaging, Milton Keynes MK7 6AA, Bucks - England
[57] Assoc Etoiles Tous, 19 Rue St Laurent, F-77320 Maisoncelles, St Martin Du Bo - France
[58] Observ Astron Cordoba UNC, Laprida 854, Cordoba - Argentina
[59] AGORA, AGORA Observ Makes, 18 Rue Georges Bizet, F-97421 La Riviere - France
[60] Millennium Inst Astrophys, Santiago - Chile
[61] Pontificia Univ Catolica Chile, Inst Astrophys, Av Vicuna Mackenna 4860, Santiago - Chile
[62] Pontificia Univ Catolica Chile, Ctr Astroengn, Av Vicuna Mackenna 4860, Santiago - Chile
[63] Pontificia Univ Catolica Chile, Dept Elect Engn, Av Vicuna Mackenna 4860, Santiago - Chile
Número total de Afiliações: 63
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Astronomy & Astrophysics; v. 652, AUG 25 2021. |
| Citações Web of Science: | 0 |
| Resumo | |
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 (3 sigma), and its width variations may indicate an eccentricity higher than similar to 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. (AU) | |
| Processo FAPESP: | 18/11239-8 - Determinação de órbitas de satélites e anéis a partir da análise de imagens por sondas espaciais |
| Beneficiário: | Altair Ramos Gomes Junior |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |
| Processo FAPESP: | 16/24561-0 - A relevância dos pequenos corpos em dinâmica orbital |
| Beneficiário: | Othon Cabo Winter |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |