{"paper":{"title":"Acceleration of Individual, Decimetre-sized Aggregates in the Lower Coma of Comet 67P/Churyumov-Gerasimenko","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"A. Gicquel, B. Davidsson, C. Barbieri, C. Guettler, C. Tubiana, D. Koschny, E. Kuehrt, F. Marzari, G. Cremonese, G. Naletto, H. Rickman, H. Sierks, H. U. Keller, I. Bertini, J. Agarwal, J.-B. Vincent, J. Deller, J. J. Lopez Moreno, J. Knollenberg, J.-L. Bertaux, J.-R. Kramm, L. Jorda, L. M. Lara, M. A. Barucci, M. De Cecco, M. F. A'Hearn, M. Fulle, M. Hofmann, M. Kueppers, M. Lazzarin, N. Oklay, N. Thomas, O. Groussin, P. J. Gutierrez, P. L. Lamy, R. Rodrigo, S. Boudreault, S. Debei, S. F. Hviid, S. Fornasier, S. Hoefner, V. Da Deppo, W.-H. Ip, X. Shi","submitted_at":"2016-08-29T07:19:01Z","abstract_excerpt":"We present OSIRIS/NAC observations of decimetre-sized, likely ice-containing aggregates ejected from a confined region on the surface of comet 67P/Churyumov-Gerasimenko. The images were obtained in January 2016 when the comet was at 2 AU from the Sun out-bound from perihelion. We measure the acceleration of individual aggregates through a two-hour image series. Approximately 50% of the aggregates are accelerated away from the nucleus, and 50% towards it, and likewise towards either horizontal direction. The accelerations are up to one order of magnitude stronger than local gravity, and are mos"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1608.07933","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"}