{"paper":{"title":"Young \"Dipper\" Stars in Upper Sco and $\\rho$ Oph Observed by K2","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.EP","authors_text":"A. W. Mann, D. M. LaCourse, E. Gaidos, G. Kennedy, J. P. Williams, K. J. Jek, M. Ansdell, M. C. Wyatt, S. A. Rappaport, T. L. Jacobs, T. S. Boyajian","submitted_at":"2015-10-29T20:00:01Z","abstract_excerpt":"We present ten young ($\\lesssim$10 Myr) late-K and M dwarf stars observed in K2 Campaign 2 that host protoplanetary disks and exhibit quasi-periodic or aperiodic dimming events. Their optical light curves show $\\sim$10-20 dips in flux over the 80-day observing campaign with durations of $\\sim$0.5-2 days and depths of up to $\\sim$40%. These stars are all members of the $\\rho$ Ophiuchus ($\\sim$1 Myr) or Upper Scorpius ($\\sim$10 Myr) star-forming regions. To investigate the nature of these \"dippers\" we obtained: optical and near-infrared spectra to determine stellar properties and identify accret"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1510.08853","kind":"arxiv","version":2},"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"}