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  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
  4. 1.01 Articoli in rivista
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/31646
Title: Rapid contraction of giant planets orbiting the 20-million-year-old star V1298 Tau
Authors: Suárez Mascareño, A.
Damasso, Mario 
Lodieu, N.
SOZZETTI, Alessandro 
Béjar, V. J.S.
BENATTI, SERENA 
Zapatero Osorio, M. R.
MICELA, Giuseppina 
Rebolo, R.
DESIDERA, Silvano 
Murgas, F.
CLAUDI, Riccardo 
González Hernández, J. I.
Malavolta, L. 
Burgo, C. del
D'ORAZI, VALENTINA 
Amado, P. J.
Locci, Daniele 
Tabernero, H. M.
Marzari, F.
Aguado, D. S.
TURRINI, Diego 
Cardona Guillén, C.
Toledo-Padrón, B.
MAGGIO, Antonio 
Aceituno, J.
Bauer, F. F.
Caballero, J. A.
Chinchilla, P.
Esparza-Borges, E.
González-Álvarez, E.
Granzer, T.
Luque, R.
Martín, E. L.
Nowak, G.
Oshagh, M.
Pallé, E.
Parviainen, H.
Quirrenbach, A.
Reiners, A.
Ribas, I.
Strassmeier, K. G.
Weber, M.
Mallonn, M.
Issue Date: 2021
Journal: NATURE ASTRONOMY 
Number: 6
Issue: 2
First Page: 232
Abstract: Current theories of planetary evolution predict that infant giant planets have large radii and very low densities before they slowly contract to reach their final size after about several hundred million years1,2. These theoretical expectations remain untested so far as the detection and characterization of very young planets is extremely challenging due to the intense stellar activity of their host stars3,4. Only the recent discoveries of young planetary transiting systems allow initial constraints to be placed on evolutionary models5–7. With an estimated age of 20 million years, V1298 Tau is one of the youngest solar-type stars known to host transiting planets; it harbours a system composed of four planets, two Neptune-sized, one Saturn-sized and one Jupiter-sized8,9. Here we report a multi-instrument radial velocity campaign of V1298 Tau, which allowed us to determine the masses of two of the planets in the system. We find that the two outermost giant planets, V1298 Tau b and e (0.64 ± 0.19 and 1.16 ± 0.30 Jupiter masses, respectively), seem to contradict our knowledge of early-stages planetary evolution. According to models, they should reach their mass–radius combination only hundreds of millions of years after formation. This result suggests that giant planets can contract much more quickly than usually assumed.
URI: http://hdl.handle.net/20.500.12386/31646
URL: https://www.nature.com/articles/s41550-021-01533-7
https://api.elsevier.com/content/abstract/scopus_id/85120645104
ISSN: 2397-3366
DOI: 10.1038/s41550-021-01533-7
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

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