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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:20/0  |  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.


  
Particle-Size Distributions and Solubility of Aerosol Iron Over the Antarctic Peninsula During Austral Summer 期刊论文
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2020, 125 (11)
作者:  Gao, Yuan;  Yu, Shun;  Sherrell, Robert M.;  Fan, Songyun;  Bu, Kaixuan;  Anderson, James R.
收藏  |  浏览/下载:15/0  |  提交时间:2020/08/18
aerosol iron  aerosol Fe solubility  aerosol particle size  Antarctic Peninsula  atmospheric iron deposition flux  
Imperfect transparency and camouflage in glass frogs 期刊论文
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2020, 117 (23) : 12885-12890
作者:  Barnett, James B.;  Michalis, Constantine;  Anderson, Hannah M.;  McEwen, Brendan L.;  Yeager, Justin;  Pruitt, Jonathan N.;  Scott-Samuel, Nicholas E.;  Cuthill, Innes C.
收藏  |  浏览/下载:8/0  |  提交时间:2020/06/01
camouflage  color change  edge diffusion  glass frog  transparency  
Tropical cyclone sensitivities to CO2 doubling: roles of atmospheric resolution, synoptic variability and background climate changes 期刊论文
CLIMATE DYNAMICS, 2019, 53: 5999-6033
作者:  Vecchi, Gabriel A.;  Delworth, Thomas L.;  Murakami, Hiroyuki;  Underwood, Seth D.;  Wittenberg, Andrew T.;  Zeng, Fanrong;  Zhang, Wei;  Baldwin, Jane W.;  Bhatia, Kieran T.;  Cooke, William;  He, Jie;  Kapnick, Sarah B.;  Knutson, Thomas R.;  Villarini, Gabriele;  van der Wiel, Karin;  Anderson, Whit;  Balaji, V.;  Chen, Jan-Huey;  Dixon, Keith W.;  Gudgel, Rich;  Harris, Lucas M.;  Jia, Liwei;  Johnson, Nathaniel C.;  Lin, Shian-Jiann;  Liu, Maofeng;  Ng, Ching Ho Justin;  Rosati, Anthony;  Smith, James A.;  Yang, Xiaosong
收藏  |  浏览/下载:13/0  |  提交时间:2019/11/27
Anthropogenic modifications to fire regimes in the wider Serengeti-Mara ecosystem 期刊论文
GLOBAL CHANGE BIOLOGY, 2019, 25 (10) : 3406-3423
作者:  Probert, James R.;  Parr, Catherine L.;  Holdo, Ricardo M.;  Anderson, T. Michael;  Archibald, Sally;  Mustaphi, Colin J. Courtney;  Dobson, Andrew P.;  Donaldson, Jason E.;  Hopcraft, Grant C.;  Hempson, Gareth P.;  Morrison, Thomas A.;  Beale, Colin M.
收藏  |  浏览/下载:8/0  |  提交时间:2019/11/27
conservation  fire regime  management  overgrazing  protected areas  savannah  Serengeti  
New NSF policy will stifle innovation 期刊论文
SCIENCE, 2018, 362 (6412) : 297-298
作者:  Alberts, Susan;  Anderson, Rindy;  Ballen, Cissy J.;  Barrick, Jeffrey E.;  Bordenstein, Seth;  Boyd, Sunny K.;  Bracken-Grissom, Heather;  Braun, Christopher B.;  Coppola, David M.;  Cox, Daniel N.;  Crandall, Keith A.;  Cronin, Thomas W.;  Demas, Gregory E.;  Derby, Charles D.;  Edwards, Scott V.;  Eisthen, Heather L.;  Foster, James A.;  Gilbert, Cole;  Halanych, Kenneth M.;  Herculano-Houzel, Suzana;  Hoekstra, Hopi;  Hof, Patrick R.;  Hoke, Kim L.;  Holekamp, Kay E.;  Jarvis, Erich;  Johnsen, Sonke;  Katz, Paul S.;  Kay, Leslie M.;  Kehoe, David M.;  Kelley, Darcy B.;  Kerr, Benjamin;  Ketterson, Ellen;  Kier, William M.;  Koehl, Mimi A. R.;  Last, Robert L.;  Lazazzera, Beth;  Lenski, Richard E.;  Losos, Jonathan B.;  Lutterschmidt, Deborah I.;  Lynch, Michael;  Mahon, Andrew R.;  Martindale, Mark Q.;  Martins, Emilia P.;  McClintock, James B.;  Mesce, Karen A.;  Mukhopadhyay, Suchetana;  Oakley, Todd H.;  Phelps, Steven M.;  Phillips, Richard P.;  Queller, David;  Renn, Suzy C. P.;  Rosvall, Kimberly;  Schweizer, Felix E.;  Shubin, Neil;  Silk, Joan;  Strassmann, Joan E.;  Strausfeld, Nicholas J.;  Strauss, Sharon Y.;  Striedter, Georg;  Swalla, Billie J.;  Tarrant, Ann;  Throop, Heather L.;  Turner, Paul E.;  Voss, S. Randal;  Wake, Marvalee H.;  Wares, John P.;  Webster, Mike;  White, Stephanie A.;  Wilczynski, Walter;  Wray, Greg A.;  Wright, Timothy F.
收藏  |  浏览/下载:21/0  |  提交时间:2019/11/27
Global carbon intensity of crude oil production 期刊论文
SCIENCE, 2018, 361 (6405) : 851-853
作者:  Masnadi, Mohammad S.;  El-Houjeiri, Hassan M.;  Schunack, Dominik;  Li, Yunpo;  Englander, Jacob G.;  Badahdah, Alhassan;  Monfort, Jean-Christophe;  Anderson, James E.;  Wallington, Timothy J.;  Bergerson, Joule A.;  Gordon, Deborah;  Koomey, Jonathan;  Przesmitzki, Steven;  Azevedo, Ines L.;  Bi, Xiaotao T.;  Duffy, James E.;  Heath, Garvin A.;  Keoleian, Gregory A.;  McGlade, Christophe;  Meehan, D. Nathan;  Yeh, Sonia;  You, Fengqi;  Wang, Michael;  Brandt, Adam R.
收藏  |  浏览/下载:10/0  |  提交时间:2019/11/27
Combining abundance and performance data reveals how temperature regulates coastal occurrences and activity of a roaming apex predator 期刊论文
GLOBAL CHANGE BIOLOGY, 2018, 24 (5) : 1884-1893
作者:  Payne, Nicholas L.;  Meyer, Carl G.;  Smith, James A.;  Houghton, Jonathan D. R.;  Barnett, Adam;  Holmes, Bonnie J.;  Nakamura, Itsumi;  Papastamatiou, Yannis P.;  Royer, Mark A.;  Coffey, Daniel M.;  Anderson, James M.;  Hutchinson, Melanie R.;  Sato, Katsufumi;  Halsey, Lewis G.
收藏  |  浏览/下载:9/0  |  提交时间:2019/04/09
accelerometer  biogeography  climate change  fundamental niche  overall dynamic body acceleration  physiological ecology  realized niche  species distribution modelling  tagging  thermal performance curve  
Pyrodiversity interacts with rainfall to increase bird and mammal richness in African savannas 期刊论文
ECOLOGY LETTERS, 2018, 21 (4) : 557-567
作者:  Beale, Colin M.;  Mustaphi, Colin J. Courtney;  Morrison, Thomas A.;  Archibald, Sally;  Anderson, T. Michael;  Dobson, Andrew P.;  Donaldson, Jason E.;  Hempson, Gareth P.;  Probert, James;  Parr, Catherine L.
收藏  |  浏览/下载:5/0  |  提交时间:2019/04/09
Bats  birds  conservation  fire  fire management  INLA  mammals  protected areas  
An overview of mesoscale aerosol processes, comparisons, and validation studies from DRAGON networks 期刊论文
ATMOSPHERIC CHEMISTRY AND PHYSICS, 2018, 18 (2) : 655-671
作者:  Holben, Brent N.;  Kim, Jhoon;  Sano, Itaru;  Mukai, Sonoyo;  Eck, Thomas F.;  Giles, David M.;  Schafer, Joel S.;  Sinyuk, Aliaksandr;  Slutsker, Ilya;  Smirnov, Alexander;  Sorokin, Mikhail;  Anderson, Bruce E.;  Che, Huizheng;  Choi, Myungje;  Crawford, James H.;  Ferrare, Richard A.;  Garay, Michael J.;  Jeong, Ukkyo;  Kim, Mijin;  Kim, Woogyung;  Knox, Nichola;  Li, Zhengqiang;  Lim, Hwee S.;  Liu, Yang;  Maring, Hal;  Nakata, Makiko;  Pickering, Kenneth E.;  Piketh, Stuart;  Redemann, Jens;  Reid, Jeffrey S.;  Salinas, Santo;  Seo, Sora;  Tan, Fuyi;  Tripathi, Sachchida N.;  Toon, Owen B.;  Xiao, Qingyang
收藏  |  浏览/下载:10/0  |  提交时间:2019/04/09