{"paper":{"title":"Unexpected cyclic behavior in cosmic ray protons observed by PAMELA at 1 AU","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.EP","astro-ph.SR"],"primary_cat":"physics.space-ph","authors_text":"A. Bruno, A. G. Mayorov, A. Leonov, A. M. Galper, A. Monaco, A. N. Kvashnin, A. Vacchi, A. V. Karelin, B. Panico, C. De Santis, D. Campana, E. A. Bogomolov, E. Mocchiutti, E. Vannuccini, F. Cafagna, G. A. Bazilevskaya, G. Castellini, G. C. Barbarino, G. Osteria, G. Pizzella, G. Vasilyev, G. Zampa, L. Marcelli, M. Boezio, M. Bongi, M. Casolino, M. Martucci, M. Merg\\`e, M. Pearce, M. Ricci, M. Simon, N. Mori, N. Zampa, O. Adriani, P. Carlson, P. Papini, P. Picozza, P. Spillantini, R. Bellotti, R. Munini, R. Sparvoli, S. A. Voronov, S. B. Ricciarini, S. Koldobskiy, S. V. Koldashov, S. Y. Krutkov, V. Bonvicini, V. Di Felice, V. Malakhov, V. V. Mikhailov, W. Menn, Y. I. Stozhkov, Y. T. Yurkin","submitted_at":"2018-01-24T08:16:11Z","abstract_excerpt":"Protons detected by the PAMELA experiment in the period 2006-2014 have been analyzed in the energy range between 0.40-50 GV to explore possible periodicities besides the well known solar undecennial modulation. An unexpected clear and regular feature has been found at rigidities below 15 GV, with a quasi-periodicity of $\\sim$450 days. A possible Jovian origin of this periodicity has been investigated in different ways. The results seem to favor a small but not negligible contribution to cosmic rays from the Jovian magnetosphere, even if other explanations cannot be excluded."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1801.08418","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"}