Utilizza questo identificativo per citare o creare un link a questo documento:
http://hdl.handle.net/20.500.12386/28766
Campo DC | Valore | Lingua |
---|---|---|
dc.contributor.author | BONOMO, ALDO STEFANO | en_US |
dc.contributor.author | Zeng, Li | en_US |
dc.contributor.author | Damasso, Mario | en_US |
dc.contributor.author | Leinhardt, Zoë M. | en_US |
dc.contributor.author | Justesen, Anders B. | en_US |
dc.contributor.author | Lopez, Eric | en_US |
dc.contributor.author | Lund, Mikkel N. | en_US |
dc.contributor.author | Malavolta, Luca | en_US |
dc.contributor.author | Silva Aguirre, Victor | en_US |
dc.contributor.author | Buchhave, Lars A. | en_US |
dc.contributor.author | CORSARO, ENRICO MARIA NICOLA | en_US |
dc.contributor.author | Denman, Thomas | en_US |
dc.contributor.author | Lopez-Morales, Mercedes | en_US |
dc.contributor.author | Mills, Sean M. | en_US |
dc.contributor.author | Mortier, Annelies | en_US |
dc.contributor.author | Rice, Ken | en_US |
dc.contributor.author | SOZZETTI, Alessandro | en_US |
dc.contributor.author | Vanderburg, Andrew | en_US |
dc.contributor.author | AFFER, Laura | en_US |
dc.contributor.author | Arentoft, Torben | en_US |
dc.contributor.author | Benbakoura, Mansour | en_US |
dc.contributor.author | Bouchy, François | en_US |
dc.contributor.author | Christensen-Dalsgaard, Jørgen | en_US |
dc.contributor.author | Collier Cameron, Andrew | en_US |
dc.contributor.author | COSENTINO, Rosario | en_US |
dc.contributor.author | Dressing, Courtney D. | en_US |
dc.contributor.author | Dumusque, Xavier | en_US |
dc.contributor.author | Figueira, Pedro | en_US |
dc.contributor.author | Fiorenzano, Aldo F. M. | en_US |
dc.contributor.author | García, Rafael A. | en_US |
dc.contributor.author | Handberg, Rasmus | en_US |
dc.contributor.author | HARUTYUNYAN, AVET | en_US |
dc.contributor.author | Johnson, John A. | en_US |
dc.contributor.author | Kjeldsen, Hans | en_US |
dc.contributor.author | Latham, David W. | en_US |
dc.contributor.author | Lovis, Christophe | en_US |
dc.contributor.author | Lundkvist, Mia S. | en_US |
dc.contributor.author | Mathur, Savita | en_US |
dc.contributor.author | Mayor, Michel | en_US |
dc.contributor.author | MICELA, Giuseppina | en_US |
dc.contributor.author | MOLINARI, Emilio Carlo | en_US |
dc.contributor.author | Motalebi, Fatemeh | en_US |
dc.contributor.author | NASCIMBENI, VALERIO | en_US |
dc.contributor.author | Nava, Chantanelle | en_US |
dc.contributor.author | Pepe, Francesco | en_US |
dc.contributor.author | Phillips, David F. | en_US |
dc.contributor.author | Piotto, Giampaolo | en_US |
dc.contributor.author | PORETTI, Ennio | en_US |
dc.contributor.author | Sasselov, Dimitar | en_US |
dc.contributor.author | Ségransan, Damien | en_US |
dc.contributor.author | Udry, Stéphane | en_US |
dc.contributor.author | Watson, Chris | en_US |
dc.date.accessioned | 2020-12-09T16:21:17Z | - |
dc.date.available | 2020-12-09T16:21:17Z | - |
dc.date.issued | 2019 | en_US |
dc.identifier.issn | 2397-3366 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/28766 | - |
dc.description.abstract | Measures of exoplanet bulk densities indicate that small exoplanets with radius less than 3 Earth radii (R<SUB>⊕</SUB>) range from low-density sub-Neptunes containing volatile elements<SUP>1</SUP> to higher-density rocky planets with Earth-like<SUP>2</SUP> or iron-rich<SUP>3</SUP> (Mercury-like) compositions. Such astonishing diversity in observed small exoplanet compositions may be the product of different initial conditions of the planet-formation process or different evolutionary paths that altered the planetary properties after formation<SUP>4</SUP>. Planet evolution may be especially affected by either photoevaporative mass loss induced by high stellar X-ray and extreme ultraviolet (XUV) flux<SUP>5</SUP> or giant impacts<SUP>6</SUP>. Although there is some evidence for the former<SUP>7,8</SUP>, there are no unambiguous findings so far about the occurrence of giant impacts in an exoplanet system. Here, we characterize the two innermost planets of the compact and near-resonant system Kepler-107 (ref. <SUP>9</SUP>). We show that they have nearly identical radii (about 1.5-1.6R<SUB>⊕</SUB>), but the outer planet Kepler-107 c is more than twice as dense (about 12.6 g cm<SUP>-3</SUP>) as the innermost Kepler-107 b (about 5.3 g cm<SUP>-3</SUP>). In consequence, Kepler-107 c must have a larger iron core fraction than Kepler-107 b. This imbalance cannot be explained by the stellar XUV irradiation, which would conversely make the more-irradiated and less-massive planet Kepler-107 b denser than Kepler-107 c. Instead, the dissimilar densities are consistent with a giant impact event on Kepler-107 c that would have stripped off part of its silicate mantle. This hypothesis is supported by theoretical predictions from collisional mantle stripping<SUP>10</SUP>, which match the mass and radius of Kepler-107 c. | en_US |
dc.language.iso | eng | en_US |
dc.title | A giant impact as the likely origin of different twins in the Kepler-107 exoplanet system | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1038/s41550-018-0684-9 | en_US |
dc.identifier.scopus | 2-s2.0-85065653360 | en_US |
dc.identifier.isi | 000467437500016 | en_US |
dc.identifier.url | https://www.nature.com/articles/s41550-018-0684-9 | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 3 | en_US |
dc.relation.firstpage | 416 | en_US |
dc.type.referee | REF_1 | en_US |
dc.relation.scientificsector | FIS/05 - ASTRONOMIA E ASTROFISICA | en_US |
dc.relation.journal | NATURE ASTRONOMY | en_US |
dc.type.miur | 262 Articolo in rivista | - |
dc.identifier.adsbibcode | 2019NatAs...3..416B | en_US |
dc.description.apc | no | en_US |
dc.description.oa | 1 – prodotto con file in versione Open Access (allegare il file al passo 5-Carica) | en_US |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.openairetype | Article | - |
item.languageiso639-1 | en | - |
item.cerifentitytype | Publications | - |
item.grantfulltext | open | - |
item.fulltext | With Fulltext | - |
crisitem.author.dept | O.A. Torino | - |
crisitem.author.dept | O.A. Torino | - |
crisitem.author.dept | O.A. Catania | - |
crisitem.author.dept | O.A. Torino | - |
crisitem.author.dept | O.A. Palermo | - |
crisitem.author.dept | O.A. Catania | - |
crisitem.author.dept | O.A. Palermo | - |
crisitem.author.dept | O.A. Brera | - |
crisitem.author.dept | O.A. Padova | - |
crisitem.author.dept | O.A. Brera | - |
crisitem.author.orcid | 0000-0002-6177-198X | - |
crisitem.author.orcid | 0000-0001-9984-4278 | - |
crisitem.author.orcid | 0000-0002-6492-2085 | - |
crisitem.author.orcid | 0000-0001-8835-2075 | - |
crisitem.author.orcid | 0000-0002-7504-365X | - |
crisitem.author.orcid | 0000-0001-5600-3778 | - |
crisitem.author.orcid | 0000-0003-1784-1431 | - |
crisitem.author.orcid | 0000-0002-9900-4751 | - |
crisitem.author.orcid | 0000-0002-1742-7735 | - |
crisitem.author.orcid | 0000-0001-9770-1214 | - |
crisitem.author.orcid | 0000-0003-1200-0473 | - |
crisitem.journal.journalissn | 2397-3366 | - |
crisitem.journal.ance | E240167 | - |
È visualizzato nelle collezioni: | 1.01 Articoli in rivista |
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Bonomoetal_2019.pdf | postprint | 2.27 MB | Adobe PDF | Visualizza/apri |
Nat. Astr. main. s41550-018-0684-9.pdf | [Administrators only] | 2.52 MB | Adobe PDF |
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