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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;  ;  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;  ;  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:17/0  |  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.


  
Dispersal: The Eighth Fire Seasonality Effect on Plants 期刊论文
TRENDS IN ECOLOGY & EVOLUTION, 2020, 35 (4) : 305-307
作者:  Keith, David A.;  Dunker, Bianca;  Driscoll, Don A.
收藏  |  浏览/下载:2/0  |  提交时间:2020/07/02
Crustal and time-varying magnetic fields at the InSight landing site on Mars 期刊论文
NATURE GEOSCIENCE, 2020, 13 (3) : 199-+
作者:  Johnson, Catherine L.;  Mittelholz, Anna;  Langlais, Benoit;  Russell, Christopher T.;  Ansan, Veronique;  Banfield, Don;  Chi, Peter J.;  Fillingim, Matthew O.;  Forget, Francois;  Haviland, Heidi Fuqua;  Golombek, Matthew;  Joy, Steve;  Lognonne, Philippe;  Liu, Xinping;  Michaut, Chloe;  Pan, Lu;  Quantin-Nataf, Cathy;  Spiga, Aymeric;  Stanley, Sabine;  Thorne, Shea N.;  Wieczorek, Mark A.;  Yu, Yanan;  Smrekar, Suzanne E.;  Banerdt, William B.
收藏  |  浏览/下载:6/0  |  提交时间:2020/05/13
White-tailed deer and an invasive shrub facilitate faster carbon cycling in a forest ecosystem 期刊论文
FOREST ECOLOGY AND MANAGEMENT, 2019, 448: 104-111
作者:  Woods, Michaela J.;  Roberson, Elizabeth;  Cipollini, Don;  Rua, Megan A.
收藏  |  浏览/下载:3/0  |  提交时间:2019/11/27
Extracellular enzymes  Invasive species  Amur honeysuckle  Lonicera maackii  Odocoileus virginianus  
TRIP13 and APC15 drive mitotic exit by turnover of interphase- and unattached kinetochore-produced MCC 期刊论文
NATURE COMMUNICATIONS, 2018, 9
作者:  Kim, Dong Hyun;  Han, Joo Seok;  Ly, Peter;  Ye, Qiaozhen;  McMahon, Moira A.;  Myung, Kyungjae;  Corbett, Kevin D.;  Cleveland, Don W.
收藏  |  浏览/下载:5/0  |  提交时间:2019/11/27
Translating Marine Animal Tracking Data into Conservation Policy and Management 期刊论文
TRENDS IN ECOLOGY & EVOLUTION, 2019, 34 (5) : 459-473
作者:  Hays, Graeme C.;  Bailey, Helen;  Bograd, Steven J.;  Bowen, W. Don;  Campagna, Claudio;  Carmichael, Ruth H.;  Casale, Paolo;  Chiaradia, Andre;  Costa, Daniel P.;  Cuevas, Eduardo;  de Bruyn, P. J. Nico;  Dias, Maria P.;  Duarte, Carlos M.;  Dunn, Daniel C.;  Dutton, Peter H.;  Esteban, Nicole;  Friedlaender, Ari;  Goetz, Kimberly T.;  Godley, Brendan J.;  Halpin, Patrick N.;  Hamann, Mark;  Hammerschlag, Neil;  Harcourt, Robert;  Harrison, Autumn-Lynn;  Hazen, Elliott L.;  Heupel, Michelle R.;  Hoyt, Erich;  Humphries, Nicolas E.;  Kot, Connie Y.;  Lea, James S. E.;  Marsh, Helene;  Maxwell, Sara M.;  McMahon, Clive R.;  di Sciara, Giuseppe Notarbartolo;  Palacios, Daniel M.;  Phillips, Richard A.;  Righton, David;  Schofield, Gail;  Seminoff, Jeffrey A.;  Simpfendorfer, Colin A.;  Sims, David W.;  Takahashi, Akinori;  Tetley, Michael J.;  Thums, Michele;  Trathan, Philip N.;  Villegas-Amtmann, Stella;  Wells, Randall S.;  Whiting, Scott D.;  Wildermann, Natalie E.;  Msequeira, Ana M. M.
收藏  |  浏览/下载:13/0  |  提交时间:2019/11/26
Expanding the Role of Targets in Conservation Policy 期刊论文
TRENDS IN ECOLOGY & EVOLUTION, 2018, 33 (11) : 809-812
作者:  Doherty, Tim S.;  Bland, Lucie M.;  Bryan, Brett A.;  Neale, Timothy;  Nicholson, Emily;  Ritchie, Euan G.;  Driscoll, Don A.
收藏  |  浏览/下载:8/0  |  提交时间:2019/04/09
Endangered species recovery: A resource allocation problem 期刊论文
SCIENCE, 2018, 362 (6412) : 284-286
作者:  Gerber, Leah R.;  Runge, Michael C.;  Maloney, Richard F.;  Iacona, Gwenllian D.;  Drew, C. Ashton;  Avery-Gomm, Stephanie;  Brazill-Boast, James;  Crouse, Deborah;  Epanchin-Niell, Rebecca S.;  Hall, Sarah B.;  Maguire, Lynn A.;  Male, Tim;  Morgan, Don;  Newman, Jeff;  Possingham, Hugh P.;  Rumpff, Libby;  Weiss, Katherine C. B.;  Wilson, Robyn S.;  Zablan, Marilet A.
收藏  |  浏览/下载:7/0  |  提交时间:2019/11/27
An anatomic transcriptional atlas of human glioblastoma 期刊论文
SCIENCE, 2018, 360 (6389) : 660-663
作者:  Puchalski, Ralph B.;  Shah, Nameeta;  Miller, Jeremy;  Dalley, Rachel;  Nomura, Steve R.;  Yoon, Jae-Guen;  Smith, Kimberly A.;  Lankerovich, Michael;  Bertagnolli, Darren;  Bickley, Kris;  Boe, Andrew F.;  Brouner, Krissy;  Butler, Stephanie;  Caldejon, Shiella;  Chapin, Mike;  Datta, Suvro;  Dee, Nick;  Desta, Tsega;  Dolbeare, Tim;  Dotson, Nadezhda;  Ebbert, Amanda;  Feng, David;  Feng, Xu;  Fisher, Michael;  Gee, Garrett;  Goldy, Jeff;  Gourley, Lindsey;  Gregor, Benjamin W.;  Gu, Guangyu;  Hejazinia, Nika;  Hohmann, John;  Hothi, Parvinder;  Howard, Robert;  Joines, Kevin;  Kriedberg, Ali;  Kuan, Leonard;  Lau, Chris;  Lee, Felix;  Lee, Hwahyung;  Lemon, Tracy;  Long, Fuhui;  Mastan, Naveed;  Mott, Erika;  Murthy, Chantal;  Ngo, Kiet;  Olson, Eric;  Reding, Melissa;  Riley, Zack;  Rosen, David;  Sandman, David;  Shapovalova, Nadiya;  Slaughterbeck, Clifford R.;  Sodt, Andrew;  Stockdale, Graham;  Szafer, Aaron;  Wakeman, Wayne;  Wohnoutka, Paul E.;  White, Steven J.;  Marsh, Don;  Rostomily, Robert C.;  Ng, Lydia;  Dang, Chinh;  Jones, Allan;  Keogh, Bart;  Gittleman, Haley R.;  Barnholtz-Sloan, Jill S.;  Cimino, Patrick J.;  Uppin, Megha S.;  Keene, C. Dirk;  Farrokhi, Farrokh R.;  Lathia, Justin D.;  Berens, Michael E.;  Iavarone, Antonio;  Bernard, Amy;  Lein, Ed;  Phillips, John W.;  Rostad, Steven W.;  Cobbs, Charles;  Hawrylycz, Michael J.;  Foltz, Greg D.
收藏  |  浏览/下载:16/0  |  提交时间:2019/11/27
Uranium isotope evidence for two episodes of deoxygenation during Oceanic Anoxic Event 2 期刊论文
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2018, 115 (12) : 2918-2923
作者:  Clarkson, Matthew O.;  Stirling, Claudine H.;  Jenkyns, Hugh C.;  Dickson, Alexander J.;  Porcelli, Don;  Moy, Christopher M.;  von Strandmann, Philip A. E. Pogge;  Cooke, Ilsa R.;  Lenton, Timothy M.
收藏  |  浏览/下载:8/0  |  提交时间:2019/11/27
oceanic anoxia  OAE  uranium isotopes  biogeochemical model  carbon cycle