{"paper":{"title":"Gaia21bja: pre-main sequence star with quasi-periodic bursts","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"\\'Ad\\'am M\\'at\\'efy, \\'Agnes K\\'osp\\'al, Brunella Nisini, Eleonora Fiorellino, Fernando Cruz-S\\'aenz de Miera, G\\'abor Marton, L\\'aszl\\'o Szabados, M\\'aria Kun, M\\'at\\'e Szil\\'agyi, Micha{\\l} Siwak, Patrik N\\'emeth, P\\'eter \\'Abrah\\'am, Teresa Giannini, Zs\\'ofia Marianna Szab\\'o, Zs\\'ofia Nagy","submitted_at":"2026-05-19T06:06:48Z","abstract_excerpt":"Gaia21bja is a Gaia alerted young stellar object (YSO) that exhibits at least seven quasi-peridoic brightenings over a 20 year-long light curve with durations of 1.5-2 years and amplitudes up to $\\sim$1.7 mag in the Gaia $G$-band. We analyze its optical and near-infrared photometry and spectra taken using the IRTF and VLT in its faint and bright states in order to characterize its physical properties. A Lomb-Scargle periodogram analysis results in a most significant period of $916\\pm77$ days. We derived the stellar parameters as $R_\\star= 0.78 \\pm 0.04~R_\\odot$, $L_\\star=(4.5\\pm0.3) \\times 10^"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2605.19413","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2605.19413/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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"}