A ring system detected around the centaur (10199) chariklo
Felipe Braga-Ribas,Bruno Sicardy,Jose Luis Ortiz,Colin Snodgrass,F. Roques,R. Vieira-Martins,R. Vieira-Martins,R. Vieira-Martins,Julio Camargo,Marcelo Assafin,Rene Duffard,Emmanuel Jehin,Joe Pollock,Rodrigo Leiva,Marcelo Emilio,D. I. Machado,C. Colazo,E. Lellouch,Jesper Skottfelt,Jesper Skottfelt,Michaël Gillon,N. Ligier,L. Maquet,G. Benedetti-Rossi,A. Ramos Gomes,Pierre Kervella,Hektor Monteiro,Rafael Sfair,M. El Moutamid,M. El Moutamid,Gonzalo Tancredi,J. Spagnotto,Alain Maury,Nicolás Morales,Ricardo Gil-Hutton,S. Roland,A. Ceretta,Shenghong Gu,Xuefeng Wang,Kasper Harpsøe,Kasper Harpsøe,Markus Rabus,Markus Rabus,Jean Manfroid,Cyrielle Opitom,L. Vanzi,L. Mehret,L. Lorenzini,E. M. Schneiter,R. Melia,J. Lecacheux,François Colas,Frédéric Vachier,Thomas Widemann,L. Almenares,R. G. Sandness,F. Char,V. Perez,P. Lemos,Nicolás Marín Martínez,U. G. Jørgensen,U. G. Jørgensen,Martin Dominik,Fernando Roig,Daniel E. Reichart,Aaron P. LaCluyze,J. B. Haislip,K. M. Ivarsen,J. P. Moore,N. R. Frank,D. G. Lambas,D. G. Lambas +71 more
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TLDR
Observations of a multichord stellar occultation revealed the presence of a ring system around (10199) Chariklo, which is a Centaur—that is, one of a class of small objects orbiting primarily between Jupiter and Neptune—with an equivalent radius of 124 9 kilometres.Abstract:
Hitherto, rings have been found exclusively around the four giant planets in the Solar System(1). Rings are natural laboratories in which to study dynamical processes analogous to those that take place during the formation of planetary systems and galaxies. Their presence also tells us about the origin and evolution of the body they encircle. Here we report observations of a multichord stellar occultation that revealed the presence of a ring system around (10199) Chariklo, which is a Centaur-that is, one of a class of small objects orbiting primarily between Jupiter and Neptune-with an equivalent radius of 124 +/- 9 kilometres (ref. 2). There are two dense rings, with respective widths of about 7 and 3 kilometres, optical depths of 0.4 and 0.06, and orbital radii of 391 and 405 kilometres. The present orientation of the ring is consistent with an edge-on geometry in 2008, which provides a simple explanation for the dimming(3) of the Chariklo system between 1997 and 2008, and for the gradual disappearance of ice and other absorption features in its spectrum over the same period(4,5). This implies that the rings are partly composed of water ice. They may be the remnants of a debris disk, possibly confined by embedded, kilometre-sized satellites.read more
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Formation of planetary debris discs around white dwarfs – I. Tidal disruption of an extremely eccentric asteroid
TL;DR: In this paper, the authors investigate the tidal disruption of these highly eccentric (e > 0.98) asteroids as they approach and tidally disrupt around the white dwarfs (WDs) and find that this time-scale is highly dependent on the orbit's pericentre and largely independent of its semimajor axis.
Journal ArticleDOI
The size, shape, density and ring of the dwarf planet Haumea from a stellar occultation
Jose Luis Ortiz,Pablo Santos-Sanz,Bruno Sicardy,G. Benedetti-Rossi,Diane Berard,Nicolás Morales,Rene Duffard,Felipe Braga-Ribas,Ulrich Hopp,C. Ries,Valerio Nascimbeni,Valerio Nascimbeni,Francesco Marzari,V. Granata,V. Granata,András Pál,Cs. Kiss,Theodor Pribulla,R. Komžík,Kamil Hornoch,Petr Pravec,Paolo Bacci,Martina Maestripieri,L. Nerli,L. Mazzei,Mauro Bachini,F. Martinelli,Giacomo Succi,F. Ciabattari,Herman Mikuz,A. Carbognani,B. Gaehrken,Stefano Mottola,S. Hellmich,F. L. Rommel,Estela Fernández-Valenzuela,A. Campo Bagatin,Stefan Cikota,Aleksandar Cikota,J. Lecacheux,Roberto Vieira-Martins,Julio Camargo,Marcelo Assafin,François Colas,Raoul Behrend,Josselin Desmars,E. Meza,Alvaro Alvarez-Candal,W. Beisker,A. R. Gomes-Júnior,B. E. Morgado,Françoise Roques,Frédéric Vachier,Jérôme Berthier,T. G. Mueller,José M. Madiedo,Ozan Ünsalan,Eda Sonbas,N. Karaman,O. Erece,D. T. Koseoglu,T. Ozisik,S. Kalkan,Yavuz Güney,Mohammad Shameoni Niaei,O. Satir,Cahit Yeşilyaprak,Ç. Püsküllü,Afşar Kabaş,Osman Demircan,J. Alikakos,Vassilis Charmandaris,Giuseppe Leto,J. M. Ohlert,J. M. Christille,Róbert Szakáts,A. Takácsné Farkas,E. Varga-Verebélyi,Gábor Marton,A. Marciniak,Przemyslaw Bartczak,Toni Santana-Ros,M. Butkiewicz-Bąk,Grzegorz Dudziński,Victor Ali-Lagoa,Kosmas Gazeas,L. Tzouganatos,N. Paschalis,V. Tsamis,Agustín Sánchez-Lavega,Santiago Pérez-Hoyos,Ricardo Hueso,J. C. Guirado,V. Peris,R. Iglesias-Marzoa +94 more
TL;DR: Observations from multiple Earth-based observatories of Haumea passing in front of a distant star (a multi-chord stellar occultation) report the presence of a ring with an opacity of 0.5, which constrains the three-dimensional orientation of Haumesa and its triaxial shape, which is inconsistent with a homogeneous body in hydrostatic equilibrium.
Journal ArticleDOI
Thirty Meter Telescope Detailed Science Case: 2015
Warren Skidmore,Ian P. Dell'Antonio,Misato Fukugawa,Aruna Goswami,Lei Hao,David Jewitt,Greg Laughlin,Charles C. Steidel,Paul Hickson,Luc Simard,M. Schöck,Tommaso Treu,Judith G. Cohen,G. C. Anupama,Mark Dickinson,Fiona A. Harrison,Tadayuki Kodama,Jessica R. Lu,Bruce Macintosh,Matthew A. Malkan,Shude Mao,Norio Narita,Tomohiko Sekiguchi,Annapurni Subramaniam,Masaomi Tanaka,Feng Tian,Michael F. A'Hearn,Masayuki Akiyama,Babar Ali,Wako Aoki,Manjari Bagchi,Aaron J. Barth,Varun Bhalerao,Marusa Bradac,James S. Bullock,Adam J. Burgasser,Scott Chapman,Ranga-Ram Chary,Masashi Chiba,Michael C. Cooper,Asantha Cooray,Ian J. M. Crossfield,Thayne Currie,Mousumi Das,Gulab C. Dewangan,Richard de Grijs,Tuan Do,Subo Dong,Jarah Evslin,Taotao Fang,Xuan Fang,Christopher D. Fassnacht,Leigh N. Fletcher,Eric Gaidos,Roy R. Gal,Andrea M. Ghez,Mauro Giavalisco,Carol A. Grady,Thomas K. Greathouse,Rupjyoti Gogoi,Puragra Guhathakurta,Luis C. Ho,Priya Hasan,Gregory J. Herczeg,Mitsuhiko Honda,Masa Imanishi,Hanae Inami,Masanori Iye,Jason S. Kalirai,U.S. Kamath,Stephen R. Kane,Nobunari Kashikawa,Mansi M. Kasliwal,Vishal P. Kasliwal,Evan N. Kirby,Quinn Konopacky,Sébastien Lépine,Di Li,Jianyang Li,Junjun Liu,Michael C. Liu,Enrigue Lopez-Rodriguez,Jennifer M. Lotz,Philip Lubin,Lucas M. Macri,Keiichi Maeda,Franck Marchis,Christian Marois,Alan P. Marscher,Crystal L. Martin,Taro Matsuo,Claire E. Max,Alan W. McConnachie,Stacy McGough,Carl Melis,Leo Meyer,Michael J. Mumma,Takayuki Muto,Tohru Nagao,Joan Najita,Julio F. Navarro,Michael J. Pierce,Jason X. Prochaska,Masamune Oguri,Devendra K. Ojha,Yoshiko K. Okamoto,Glenn S. Orton,Angel Otarola,Masami Ouchi,Chris Packham,Deborah Padgett,Shashi B. Pandey,Catherine Pilachowsky,Klaus M. Pontoppidan,Joel R. Primack,Shalima Puthiyaveettil,Enrico Ramirez-Ruiz,Naveen A. Reddy,Michael Rich,Matthew J. Richter,James Schombert,Anjan A. Sen,Jianrong Shi,Kartik Sheth,Raghunathan Srianand,Jonathan C. Tan,Masayuki Tanaka,Angelle Tanner,Nozomu Tominaga,David Tytler,Vivian U,Lingzhi Wang,Xiaofeng Wang,Yiping Wang,Gillian Wilson,Shelley A. Wright,Chao Wu,Xufeng Wu,Renxin Xu,Toru Yamada,Bin Yang,Gongbo Zhao,Hongsheng Zhao +142 more
TL;DR: The TMT Detailed Science Case describes the transformational science that the Thirty Meter Telescope (TMT) will enable as mentioned in this paper, and more than 150 astronomers from within the TMT partnership and beyond offered input in compiling the new 2015 detailed science case, including the California Institute of Technology (Caltech), the Indian Institute of Astrophysics (IIA), the National Astronomical Observatories of the Chinese Academy of Sciences (NAOC), the NaOJ, the University of California, the Association of Canadian Universities for Research in Astronomy (ACURA) and US associate partner, AU
Journal ArticleDOI
Size distribution of particles in Saturn's rings from aggregation and fragmentation
Nikolai V. Brilliantov,Pavel L. Krapivsky,Anna S. Bodrova,Anna S. Bodrova,Frank Spahn,Hisao Hayakawa,Vladimir I. Stadnichuk,J. Schmidt +7 more
TL;DR: It is shown that a power-law size distribution with large-size cutoff, as observed in Saturn’s rings, is universal for systems where a balance between aggregation and disruptive collisions is steadily sustained and expected for any ring system where collisions play a role.
Journal ArticleDOI
Initial results from the New Horizons exploration of 2014 MU69, a small Kuiper Belt object
S. A. Stern,Harold A. Weaver,J. R. Spencer,Catherine B. Olkin,G. R. Gladstone,William M. Grundy,J. M. Moore,Dale P. Cruikshank,H. A. Elliott,H. A. Elliott,William B. McKinnon,J. Wm. Parker,A. J. Verbiscer,Leslie A. Young,D. A. Aguilar,J. M. Albers,Tom Andert,J. Andrews,Fran Bagenal,Maria E. Banks,Brian Bauer,Jeremy Bauman,K. E. Bechtold,Chloe B. Beddingfield,Chloe B. Beddingfield,N. Behrooz,K. B. Beisser,Susan D. Benecchi,E. Bernardoni,Ross A. Beyer,Ross A. Beyer,S. Bhaskaran,Carver J. Bierson,R. P. Binzel,Emma Birath,Michael K. Bird,Michael K. Bird,D. R. Boone,Alice Bowman,Veronica J. Bray,Daniel T. Britt,L. E. Brown,Matthew R. Buckley,Marc W. Buie,B. J. Buratti,L. M. Burke,Stewart Bushman,Brian Carcich,Brian Carcich,A. L. Chaikin,C. L. Chavez,C. L. Chavez,Andrew F. Cheng,E. J. Colwell,Steven J. Conard,M. P. Conner,C. A. Conrad,Jason C. Cook,S. B. Cooper,O. S. Custodio,C. M. Dalle Ore,C. M. Dalle Ore,C. C. Deboy,P. Dharmavaram,Rajani D. Dhingra,G. Dunn,Alissa M. Earle,Anthony F. Egan,J. Eisig,Mohamed Ramy El-Maarry,C. Engelbrecht,B. L. Enke,Carl J. Ercol,E. D. Fattig,Chelsea L. Ferrell,Tiffany J. Finley,J. Firer,J. Fischetti,William M. Folkner,M. N. Fosbury,Glen H. Fountain,J. M. Freeze,L. Gabasova,Lori S. Glaze,James L. Green,G. A. Griffith,Yanping Guo,Matthias Hahn,D. W. Hals,Douglas P. Hamilton,Sarah A. Hamilton,Jennifer Hanley,A. Harch,K. A. Harmon,H. M. Hart,John Hayes,Chris B. Hersman,Matthew E. Hill,T. A. Hill,Jason D. Hofgartner,Mark E. Holdridge,Mihaly Horanyi,A. Hosadurga,Alan D. Howard,Carly Howett,S. E. Jaskulek,D. E. Jennings,J. R. Jensen,Matthew Jones,H. K. Kang,D. J. Katz,David E. Kaufmann,Jj Kavelaars,James Tuttle Keane,G. P. Keleher,M. J. Kinczyk,M. C. Kochte,Peter Kollmann,Stamatios M. Krimigis,Gerhard Kruizinga,David Y. Kusnierkiewicz,M. S. Lahr,Tod R. Lauer,G. B. Lawrence,J. E. Lee,E. J. Lessac-Chenen,Ivan Linscott,Carey M. Lisse,Allen W. Lunsford,D. M. Mages,V. A. Mallder,Nicole Martin,B. H. May,David J. McComas,David J. McComas,Ralph L. McNutt,Douglas S. Mehoke,Thomas Mehoke,Derek S. Nelson,Hai Nguyen,Jorge I. Nunez,A. C. Ocampo,William M. Owen,G. K. Oxton,Alex Parker,Martin Pätzold,J. Y. Pelgrift,Frederic Pelletier,Jon Pineau,M. R. Piquette,Simon B. Porter,Silvia Protopapa,Eric Quirico,Jillian Redfern,A. L. Regiec,Harold J. Reitsema,D. C. Reuter,Derek C. Richardson,J. E. Riedel,M. A. Ritterbush,Stuart J. Robbins,D. J. Rodgers,Gabe Rogers,Debi Rose,Paul E. Rosendall,Kirby Runyon,M. G. Ryschkewitsch,M. M. Saina,M. J. Salinas,Paul M. Schenk,John Scherrer,W. R. Schlei,Bernard Schmitt,D. J. Schultz,D. C. Schurr,Francesca Scipioni,Francesca Scipioni,Rebecca Sepan,R. G. Shelton,Mark R. Showalter,M. Simon,Kelsi N. Singer,E. W. Stahlheber,Dale Stanbridge,John Stansberry,Andrew J. Steffl,Darrell F. Strobel,M. M. Stothoff,T. Stryk,J. R. Stuart,Michael E. Summers,M. B. Tapley,A. Taylor,H. W. Taylor,R. M. Tedford,Henry B. Throop,L. S. Turner,Orkan M. Umurhan,Orkan M. Umurhan,J. Van Eck,D. Velez,M. H. Versteeg,Michael Vincent,R. W. Webbert,S. Weidner,G. Weigle,J. R. Wendel,Oliver L. White,Oliver L. White,Karl Whittenburg,B. G. Williams,Kaj E. Williams,S. P. Williams,H. L. Winters,Amanda M. Zangari,T. H. Zurbuchen +215 more
TL;DR: Stern et al. as mentioned in this paper presented the initial results from the New Horizons flyby of MU_(69) on 1 January 2019, which consists of two lobes that appear to have merged at low speed, producing a contact binary.
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