中文版 | English

在结果中检索

GSTDTAP

浏览/检索结果: 共11条，第1-10条 帮助

限定条件    
已选(0)清除 条数/页：   排序方式：
A remnant planetary core in the hot-Neptune desert 期刊论文
NATURE, 2020, 583 (7814) : 39-+
作者:  David J. Armstrong;  Thé;  o A. Lopez;  Vardan Adibekyan;  Richard A. Booth;  Edward M. Bryant;  Karen A. Collins;  Magali Deleuil;  Alexandre Emsenhuber;  Chelsea X. Huang;  George W. King;  Jorge Lillo-Box;  Jack J. Lissauer;  Elisabeth Matthews;  Olivier Mousis;  Louise D. Nielsen;  Hugh Osborn;  Jon Otegi;  Nuno C. Santos;  Sé;  rgio G. Sousa;  Keivan G. Stassun;  Dimitri Veras;  Carl Ziegler;  Jack S. Acton;  Jose M. Almenara;  David R. Anderson;  David Barrado;  Susana C. C. Barros;  Daniel Bayliss;  Claudia Belardi;  Francois Bouchy;  Cé;  sar Briceñ;  o;  Matteo Brogi;  David J. A. Brown;  Matthew R. Burleigh;  Sarah L. Casewell;  Alexander Chaushev;  David R. Ciardi;  Kevin I. Collins;  Knicole D. Coló;  n;  Benjamin F. Cooke;  Ian J. M. Crossfield;  Rodrigo F. Dí;  az;  Elisa Delgado Mena;  Olivier D. S. Demangeon;  Caroline Dorn;  Xavier Dumusque;  Philipp Eigmü;  ller;  Michael Fausnaugh;  Pedro Figueira;  Tianjun Gan;  Siddharth Gandhi;  Samuel Gill;  Erica J. Gonzales;  Michael R. Goad;  Maximilian N. Gü;  nther;  Ravit Helled;  Saeed Hojjatpanah;  Steve B. Howell;  James Jackman;  James S. Jenkins;  Jon M. Jenkins;  Eric L. N. Jensen;  Grant M. Kennedy;  David W. Latham;  Nicholas Law;  Monika Lendl;  Michael Lozovsky;  Andrew W. Mann;  Maximiliano Moyano;  James McCormac;  Farzana Meru;  Christoph Mordasini;  Ares Osborn;  Don Pollacco;  Didier Queloz;  Liam Raynard;  George R. Ricker;  Pamela Rowden;  Alexandre Santerne;  Joshua E. Schlieder;  Sara Seager;  Lizhou Sha;  Thiam-Guan Tan;  Rosanna H. Tilbrook;  Eric Ting;  Sté;  phane Udry;  Roland Vanderspek;  Christopher A. Watson;  Richard G. West;  Paul A. Wilson;  Joshua N. Winn;  Peter Wheatley;  Jesus Noel Villasenor;  Jose I. Vines;  Zhuchang Zhan
收藏  |  浏览/下载：18/0  |  提交时间：2020/07/06

The interiors of giant planets remain poorly understood. Even for the planets in the Solar System, difficulties in observation lead to large uncertainties in the properties of planetary cores. Exoplanets that have undergone rare evolutionary processes provide a route to understanding planetary interiors. Planets found in and near the typically barren hot-Neptune '  desert'  (1,2)(a region in mass-radius space that contains few planets) have proved to be particularly valuable in this regard. These planets include HD149026b(3), which is thought to have an unusually massive core, and recent discoveries such as LTT9779b(4)and NGTS-4b(5), on which photoevaporation has removed a substantial part of their outer atmospheres. Here we report observations of the planet TOI-849b, which has a radius smaller than Neptune'  s but an anomalously large mass of39.1-2.6+2.7Earth masses and a density of5.2-0.8+0.7grams per cubic centimetre, similar to Earth'  s. Interior-structure models suggest that any gaseous envelope of pure hydrogen and helium consists of no more than3.9-0.9+0.8 per cent of the total planetary mass. The planet could have been a gas giant before undergoing extreme mass loss via thermal self-disruption or giant planet collisions, or it could have avoided substantial gas accretion, perhaps through gap opening or late formation(6). Although photoevaporation rates cannot account for the mass loss required to reduce a Jupiter-like gas giant, they can remove a small (a few Earth masses) hydrogen and helium envelope on timescales of several billion years, implying that any remaining atmosphere on TOI-849b is likely to be enriched by water or other volatiles from the planetary interior. We conclude that TOI-849b is the remnant core of a giant planet.


Observations of TOI-849b reveal a radius smaller than Neptune'  s but a large mass of about 40 Earth masses, indicating that the planet is the remnant core of a gas giant.


  
Stability of H3O at extreme conditions and implications for the magnetic fields of Uranus and Neptune 期刊论文
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2020, 117 (11) : 5638-5643
作者:  Huang, Peihao;  Liu, Hanyu;  Lv, Jian;  Li, Quan;  Long, Chunhong;  Wang, Yanchao;  Chen, Changfeng;  Hemley, Russell J.;  Ma, Yanming
收藏  |  浏览/下载：9/0  |  提交时间：2020/05/13
planetary science  high-pressure physics  magnetic fields  water  
A giant exoplanet orbiting a very-low-mass star challenges planet formation models 期刊论文
SCIENCE, 2019, 365 (6460) : 1441-+
作者:  Morales, J. C.;  Mustill, A. J.;  Ribas, I.;  Davies, M. B.;  Reiners, A.;  Bauers, F. F.;  Kossakowski, D.;  Herrero, E.;  Rodriguez, E.;  Lopez-Gonzalez, M. J.;  Rodriguez-Lopez, C.;  Bejar, V. J. S.;  Gonzalez-Cuesta, L.;  Luque, R.;  Palle, E.;  Perger, M.;  Baroch, D.;  Johansen, A.;  Klahr, H.;  Mordasini, C.;  Anglada-Escude, G.;  Caballero, J. A.;  Cortes-Contreras, M.;  Dreizler, S.;  Lafarga, M.;  Nagel, E.;  Passegger, V. M.;  Reffert, S.;  Rosich, A.;  Schweitzer, A.;  Tal-Or, L.;  Trifonov, T.;  Zechmeister, M.;  Quirrenbach, A.;  Amado, P. J.;  Guenther, E. W.;  Hagen, H. -J.;  Henning, T.;  Jeffers, S. V.;  Kaminski, A.;  Kuester, M.;  Montes, D.;  Seifert, W.;  Abellan, F. J.;  Abril, M.;  Aceituno, J.;  Aceituno, F. J.;  Alonso-Floriano, F. J.;  Ammler-von Eiff, M.;  Antona, R.;  Arroyo-Torres, B.;  Azzaro, M.;  Barrado, D.;  Becerril-Jarque, S.;  Benitez, D.;  Berdinas, Z. M.;  Bergond, G.;  Brinkmoller, M.;  del Burgo, C.;  Burn, R.;  Calvo-Ortega, R.;  Cano, J.;  Cardenas, M. C.;  Cardona Guillen, C.;  Carro, J.;  Casa, E.;  Casanova, V.;  Casasayas-Barris, N.;  Chaturvedi, P.;  Cifuentes, C.;  Claret, A.;  Colome, J.;  Czesla, S.;  Diez-Alonso, E.;  Dorda, R.;  Emsenhuber, A.;  Fernandez, M.;  Fernandez-Martin, A.;  Ferro, I. M.;  Fuhrmeister, B.;  Galadi-Enriquez, D.;  Gallardo Cava, I.;  Garcia Vargas, M. L.;  Garcia-Piquer, A.;  Gesa, L.;  Gonzalez-Alvarez, E.;  Gonzalez Hernandez, J. I.;  Gonzalez-Peinado, R.;  Guardia, J.;  Guijarro, A.;  de Guindos, E.;  Hatzes, A. P.;  Hauschildt, P. H.;  Hedrosa, R. P.;  Hermelo, I.;  Hernandez Arabi, R.;  Hernandez Otero, F.;  Hintz, D.;  Holgado, G.;  Huber, A.;  Huke, P.;  Johnson, E. N.;  de Juan, E.;  Kehr, M.;  Kemmer, J.;  Kim, M.;  Klueter, J.;  Klutsch, A.;  Labarga, F.;  Labiche, N.;  Lalitha, S.;  Lampon, M.;  Lara, L. M.;  Launhardt, R.;  Lazaro, F. J.;  Lizon, J. -L.;  Llamas, M.;  Lodieu, N.;  Lopez del Fresno, M.;  Lopez Salas, . F.;  Lopez-Santiago, J.;  Magan Madinabeitia, H.;  Mall, U.;  Mancini, L.;  Mandel, H.;  Marfil, E.;  Marin Molina, J. . A.;  Martin, E. L.;  Martin-Fernandez, P.;  Martin-Ruiz, S.;  Martinez-Rodriguez, H.;  Marvin, C. J.;  Mirabet, E.;  Moya, A.;  Naranjo, V.;  Nelson, R. P.;  Nortmann, L.;  Nowak, G.;  Ofir, A.;  Pascua, J.;  Pavlov, A.;  Pedraz, S.;  Perez Medialdea, D.;  Perez-Calpena, A.;  Perryman, M. A. C.;  Rabaza, O.;  Ramon Ballesta, A.;  Rebolo, R.;  Redondo, P.;  Rix, H. -W.;  Rodler, F.;  Rodriguez Trinidad, A.;  Sabotta, S.;  Sadegi, S.;  Salz, M.;  Sanchez-Blanco, E.;  Sanchez Carrasco, M. A.;  Sanchez-Lopez, A.;  Sanz-Forcada, J.;  Sarkis, P.;  Sarmiento, L. F.;  Schafer, S.;  Schlecker, M.;  Schmitt, J. H. M. M.;  Schofer, P.;  Solano, E.;  Sota, A.;  Stahl, O.;  Stock, S.;  Stuber, T.;  Sturmer, J.;  Suarez, J. C.;  Tabernero, H. M.;  Tulloch, S. M.;  Veredas, G.;  Vico-Linares, J. I.;  Vilardell, F.;  Wagner, K.;  Winkler, J.;  Wolthoff, V.;  Yan, F.;  Zapatero Osorio, M. R.
收藏  |  浏览/下载：16/0  |  提交时间：2019/11/27
Alfvenic Fluctuations Associated With Jupiter's Auroral Emissions 期刊论文
GEOPHYSICAL RESEARCH LETTERS, 2019, 46 (13) : 7157-7165
作者:  Gershman, Daniel J.;  Connerney, John E. P.;  Kotsiaros, Stavros;  DiBraccio, Gina A.;  Martos, Yasmina M.;  Vinas, Adolfo F.;  Hue, Vincent;  Clark, George;  Bagenal, Fran;  Levin, Steve;  Bolton, Scott J.
收藏  |  浏览/下载：5/0  |  提交时间：2019/11/27
Formation of a New Great Dark Spot on Neptune in 2018 期刊论文
GEOPHYSICAL RESEARCH LETTERS, 2019, 46 (6) : 3108-3113
作者:  Simon, A. A.;  Wong, M. H.;  Hsu, A. I.
收藏  |  浏览/下载：9/0  |  提交时间：2019/11/26
atmospheres  vortices  dynamics  
Impact craters on Pluto and Charon indicate a deficit of small Kuiper belt objects 期刊论文
SCIENCE, 2019, 363 (6430) : 955-+
作者:  Singer, K. N.;  McKinnon, W. B.;  Gladman, B.;  Greenstreet, S.;  Bierhaus, E. B.;  Stern, S. A.;  Parker, A. H.;  Robbins, S. J.;  Schenk, P. M.;  Grundy, W. M.;  Bray, V. J.;  Beyer, R. A.;  Binzel, R. P.;  Weaver, H. A.;  Young, L. A.;  Spencer, J. R.;  Kavelaars, J. J.;  Moore, J. M.;  Zangari, A. M.;  Olkin, C. B.;  Lauer, T. R.;  Lisse, C. M.;  Ennico, K.
收藏  |  浏览/下载：11/0  |  提交时间：2019/11/27
Spectrally resolved helium absorption from the extended atmosphere of a warm Neptune-mass exoplanet 期刊论文
SCIENCE, 2018, 362 (6421) : 1384-+
作者:  Allart, R.;  Bourrier, V.;  Lovis, C.;  Ehrenreich, D.;  Spake, J. J.;  Wyttenbach, A.;  Pino, L.;  Pepe, F.;  Sing, D. K.;  des Etangs, A. Lecavelier
收藏  |  浏览/下载：8/0  |  提交时间：2019/11/27
Solar-Driven Variation in the Atmosphere of Uranus 期刊论文
GEOPHYSICAL RESEARCH LETTERS, 2017, 44 (24)
作者:  Aplin, K. L.;  Harrison, R. G.
收藏  |  浏览/下载：4/0  |  提交时间：2019/04/09
ionization  cosmic rays  aerosol  nucleation  
Stabilization of ammonia-rich hydrate inside icy planets 期刊论文
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2017, 114 (34) : 9003-9008
作者:  Robinson, Victor Naden;  Wang, Yanchao;  Ma, Yanming;  Hermann, Andreas
收藏  |  浏览/下载：5/0  |  提交时间：2019/11/27
ammonia hydrate  pressure  phase transition  density functional theory  
Zones, spots, and planetary-scale waves beating in brown dwarf atmospheres 期刊论文
SCIENCE, 2017, 357 (6352) : 683-+
作者:  Apai, D.;  Karalidi, T.;  Marley, M. S.;  Yang, H.;  Flateau, D.;  Metchev, S.;  Cowan, N. B.;  Buenzli, E.;  Burgasser, A. J.;  Radigan, J.;  Artigau, E.;  Lowrance, P.
收藏  |  浏览/下载：0/0  |  提交时间：2019/11/27