Author
Armstrong, David JLopez, Théo 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, Sérgio 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
Briceño, César
Brogi, Matteo
Brown, David J A
Burleigh, Matthew R
Casewell, Sarah L
Chaushev, Alexander
Ciardi, David R
Collins, Kevin I
Colón, Knicole D
Cooke, Benjamin F
Crossfield, Ian J M
Díaz, Rodrigo F
Mena, Elisa Delgado
Demangeon, Olivier D S
Dorn, Caroline
Dumusque, Xavier
Eigmüller, Philipp
Fausnaugh, Michael
Figueira, Pedro
Gan, Tianjun
Gandhi, Siddharth
Gill, Samuel
Gonzales, Erica J
Goad, Michael R
Günther, 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, Stéphane
Vanderspek, Roland
Watson, Christopher A
West, Richard G
Wilson, Paul A
Winn, Joshua N
Wheatley, Peter
Villasenor, Jesus Noel
Vines, Jose I
Zhan, Zhuchang
Affiliation
Univ Arizona, Lunar & Planetary LabIssue Date
2020-07-02
Metadata
Show full item recordPublisher
NATURE PUBLISHING GROUPCitation
Armstrong, D.J., Lopez, T.A., Adibekyan, V. et al. A remnant planetary core in the hot-Neptune desert. Nature 583, 39–42 (2020). https://doi.org/10.1038/s41586-020-2421-7Journal
NATURERights
© The Author(s), under exclusive licence to Springer Nature Limited 2020.Collection Information
This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.Abstract
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 HD149026b3, which is thought to have an unusually massive core, and recent discoveries such as LTT9779b4 and NGTS-4b5, 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 of [Formula: see text] Earth masses and a density of [Formula: see text] grams per cubic centimetre, similar to Earth's. Interior-structure models suggest that any gaseous envelope of pure hydrogen and helium consists of no more than [Formula: see text] 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 formation6. 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.Note
6 month embargo; published online: 1 July 2020ISSN
0028-0836EISSN
1476-4687PubMed ID
32612222Version
Final accepted manuscriptae974a485f413a2113503eed53cd6c53
10.1038/s41586-020-2421-7
Scopus Count
Collections
Related articles
- A super-massive Neptune-sized planet.
- Authors: Naponiello L, Mancini L, Sozzetti A, Bonomo AS, Morbidelli A, Dou J, Zeng L, Leinhardt ZM, Biazzo K, Cubillos PE, Pinamonti M, Locci D, Maggio A, Damasso M, Lanza AF, Lissauer JJ, Collins KA, Carter PJ, Jensen ELN, Bignamini A, Boschin W, Bouma LG, Ciardi DR, Cosentino R, Crossfield I, Desidera S, Dumusque X, Fiorenzano AFM, Fukui A, Giacobbe P, Gnilka CL, Ghedina A, Guilluy G, Harutyunyan A, Howell SB, Jenkins JM, Lund MB, Kielkopf JF, Lester KV, Malavolta L, Mann AW, Matson RA, Matthews EC, Nardiello D, Narita N, Pace E, Pagano I, Palle E, Pedani M, Seager S, Schlieder JE, Schwarz RP, Shporer A, Twicken JD, Winn JN, Ziegler C, Zingales T
- Issue date: 2023 Oct
- Interiors of giant planets inside and outside the solar system.
- Authors: Guillot T
- Issue date: 1999 Oct 1
- Discovery of a cool planet of 5.5 Earth masses through gravitational microlensing.
- Authors: Beaulieu JP, Bennett DP, Fouqué P, Williams A, Dominik M, Jørgensen UG, Kubas D, Cassan A, Coutures C, Greenhill J, Hill K, Menzies J, Sackett PD, Albrow M, Brillant S, Caldwell JA, Calitz JJ, Cook KH, Corrales E, Desort M, Dieters S, Dominis D, Donatowicz J, Hoffman M, Kane S, Marquette JB, Martin R, Meintjes P, Pollard K, Sahu K, Vinter C, Wambsganss J, Woller K, Horne K, Steele I, Bramich DM, Burgdorf M, Snodgrass C, Bode M, Udalski A, Szymański MK, Kubiak M, Wieckowski T, Pietrzyński G, Soszyński I, Szewczyk O, Wyrzykowski L, Paczyński B, Abe F, Bond IA, Britton TR, Gilmore AC, Hearnshaw JB, Itow Y, Kamiya K, Kilmartin PM, Korpela AV, Masuda K, Matsubara Y, Motomura M, Muraki Y, Nakamura S, Okada C, Ohnishi K, Rattenbury NJ, Sako T, Sato S, Sasaki M, Sekiguchi T, Sullivan DJ, Tristram PJ, Yock PC, Yoshioka T
- Issue date: 2006 Jan 26
- M stars as targets for terrestrial exoplanet searches and biosignature detection.
- Authors: Scalo J, Kaltenegger L, Segura A, Fridlund M, Ribas I, Kulikov YN, Grenfell JL, Rauer H, Odert P, Leitzinger M, Selsis F, Khodachenko ML, Eiroa C, Kasting J, Lammer H
- Issue date: 2007 Feb
- Structure of exoplanets.
- Authors: Spiegel DS, Fortney JJ, Sotin C
- Issue date: 2014 Sep 2