干旱区生态环境知识资源中心(Arid): A remnant planetary core in the hot-Neptune desert

Arid

DOI	10.1038/s41586-020-2421-7
	A remnant planetary core in the hot-Neptune desert
	Armstrong, David J.; Lopez, Theo A.; Adibekyan, Vardan; Booth, Richard A.; Bryant, Edward M.; Collins, Karen A.; Deleuil, Magali; Emsenhuber, Alexandre; Huang, Chelsea X.; King, George W.; Lillo-Box, Jorge; Lissauer, Jack J.; Matthews, Elisabeth; Mousis, Olivier; Nielsen, Louise D.; Osborn, Hugh; Otegi, Jon; Santos, Nuno C.; Sousa, Sergio G.; Stassun, Keivan G.; Veras, Dimitri; Ziegler, Carl; Acton, Jack S.; Almenara, Jose M.; Anderson, David R.; Barrado, David; Barros, Susana C. C.; Bayliss, Daniel; Belardi, Claudia; Bouchy, Francois; Briceno, Cesar; Brogi, Matteo; Brown, David J. A.; Burleigh, Matthew R.; Casewell, Sarah L.; Chaushev, Alexander; Ciardi, David R.; Collins, Kevin I.; Colon, Knicole D.; Cooke, Benjamin F.; Crossfield, Ian J. M.; Diaz, Rodrigo F.; Mena, Elisa Delgado; Demangeon, Olivier D. S.; Dorn, Caroline; Dumusque, Xavier; Eigmueller, Philipp; Fausnaugh, Michael; Figueira, Pedro; Gan, Tianjun; Gandhi, Siddharth; Gill, Samuel; Gonzales, Erica J.; Goad, Michael R.; Gunther, Maximilian N.; Helled, Ravit; Hojjatpanah, Saeed; Howell, Steve B.; Jackman, James; Jenkins, James S.; Jenkins, Jon M.; Jensen, Eric L. N.; Kennedy, Grant M.; Latham, David W.; Law, Nicholas; Lendl, Monika; Lozovsky, Michael; Mann, Andrew W.; Moyano, Maximiliano; McCormac, James; Meru, Farzana; Mordasini, Christoph; Osborn, Ares; Pollacco, Don; Queloz, Didier; Raynard, Liam; Ricker, George R.; Rowden, Pamela; Santerne, Alexandre; Schlieder, Joshua E.; Seager, Sara; Sha, Lizhou; Tan, Thiam-Guan; Tilbrook, Rosanna H.; Ting, Eric; Udry, Stephane; Vanderspek, Roland; Watson, Christopher A.; West, Richard G.; Wilson, Paul A.; Winn, Joshua N.; Wheatley, Peter; Villasenor, Jesus Noel; Vines, Jose I.; Zhan, Zhuchang
通讯作者	Armstrong, DJ
来源期刊	NATURE
ISSN	0028-0836
EISSN	1476-4687
出版年	2020
卷号	583 期号:7814 页码:39-+
英文摘要	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.
类型	Article
语种	英语
开放获取类型	Green Accepted
收录类别	SCI-E
WOS记录号	WOS:000544773600006
WOS关键词	EQUATION-OF-STATE ; LOW-MASS STARS ; GIANT PLANETS ; EXTRASOLAR PLANETS ; OLIGARCHIC GROWTH ; ATMOSPHERIC LOSS ; EVOLUTION ; MODELS ; CONSTRAINTS ; EXOPLANETS
WOS类目	Multidisciplinary Sciences
WOS研究方向	Science & Technology - Other Topics
来源机构	清华大学 ; University of Arizona
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/324899
作者单位	[Armstrong, David J.; Bryant, Edward M.; King, George W.; Veras, Dimitri; Anderson, David R.; Bayliss, Daniel; Brogi, Matteo; Brown, David J. A.; Cooke, Benjamin F.; Gill, Samuel; Jackman, James; Kennedy, Grant M.; McCormac, James; Meru, Farzana; Osborn, Ares; Pollacco, Don; West, Richard G.; Wilson, Paul A.; Wheatley, Peter] Univ Warwick, Ctr Exoplanets & Habitabil, Coventry, W Midlands, England; [Armstrong, David J.; Bryant, Edward M.; King, George W.; Veras, Dimitri; Anderson, David R.; Bayliss, Daniel; Brogi, Matteo; Brown, David J. A.; Cooke, Benjamin F.; Gandhi, Siddharth; Gill, Samuel; Jackman, James; Kennedy, Grant M.; McCormac, James; Meru, Farzana; Osborn, Ares; Pollacco, Don; West, Richard G.; Wilson, Paul A.; Wheatley, Peter] Univ Warwick, Dept Phys, Coventry, W Midlands, England; [Lopez, Theo A.; Deleuil, Magali; Mousis, Olivier; Osborn, Hugh; Santerne, Alexandre] Aix Marseille Univ, CNRS, CNES, LAM, Marseilles, France; [Adibekyan, Vardan; Santos, Nuno C.; Sousa, Sergio G.; Barros, Susana C. ...
推荐引用方式 GB/T 7714	Armstrong, David J.,Lopez, Theo A.,Adibekyan, Vardan,et al. A remnant planetary core in the hot-Neptune desert[J]. 清华大学, University of Arizona,2020,583(7814):39-+.
APA	Armstrong, David J..,Lopez, Theo A..,Adibekyan, Vardan.,Booth, Richard A..,Bryant, Edward M..,...&Zhan, Zhuchang.(2020).A remnant planetary core in the hot-Neptune desert.NATURE,583(7814),39-+.
MLA	Armstrong, David J.,et al."A remnant planetary core in the hot-Neptune desert".NATURE 583.7814(2020):39-+.