{"paper":{"title":"A giant impact as the likely origin of different twins in the Kepler-107 exoplanet system","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.EP","authors_text":"Aldo F. M. Fiorenzano, Aldo S. Bonomo, Alessandro Sozzetti, Anders B. Justesen, Andrew Collier Cameron, Andrew Vanderburg, Annelies Mortier, Avet Harutyunyan, Chantanelle Nava, Christophe Lovis, Chris Watson, Courtney D. Dressing, Damien S\\'egransan, David F. Phillips, David W. Latham, Dimitar Sasselov, Emilio Molinari, Ennio Poretti, Enrico Corsaro, Eric Lopez, Fatemeh Motalebi, Fran\\c{c}ois Bouchy, Francesco Pepe, Giampaolo Piotto, Giusi Micela, Hans Kjeldsen, John A. Johnson, J{\\o}rgen Christensen-Dalsgaard, Ken Rice, Lars A. Buchhave, Laura Affer, Li Zeng, Luca Malavolta, Mansour Benbakoura, Mario Damasso, Mercedes Lopez-Morales, Mia S. Lundkvist, Michel Mayor, Mikkel N. Lund, Pedro Figueira, Rafael A. Garc\\'ia, Rasmus Handberg, Rosario Cosentino, Savita Mathur, Sean M. Mills, St\\'ephane Udry, Thomas Denman, Torben Arentoft, Valerio Nascimbeni, Victor Silva Aguirre, Xavier Dumusque, Zo\\\"e M. Leinhardt","submitted_at":"2019-02-04T17:14:13Z","abstract_excerpt":"Measures of exoplanet bulk densities indicate that small exoplanets with radius less than 3 Earth radii ($R_\\oplus$) range from low-density sub-Neptunes containing volatile elements to higher density rocky planets with Earth-like or iron-rich (Mercury-like) compositions. Such astonishing diversity in observed small exoplanet compositions may be the product of different initial conditions of the planet-formation process and/or different evolutionary paths that altered the planetary properties after formation. Planet evolution may be especially affected by either photoevaporative mass loss induc"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1902.01316","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}