{"paper":{"title":"Chromospheric and Coronal Activity in the 500-Myr-old Open Cluster M37: Evidence for Coronal Stripping?","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Alejandro N\\'u\\~nez, Kevin R. Covey, Marcel A. Ag\\\"ueros, Mercedes L\\'opez-Morales","submitted_at":"2016-11-28T20:03:37Z","abstract_excerpt":"We present the results of a spectroscopic survey to characterize chromospheric activity, as measured by H$\\alpha$ emission, in low-mass members of the 500-Myr-old open cluster M37. Combining our new measurements of H$\\alpha$ luminosities ($L_{H\\alpha}$) with previously cataloged stellar properties, we identify saturated and unsaturated regimes in the dependence of the $L_{H\\alpha}$-to-bolometric-luminosity ratio, $L_{H\\alpha}/L_{bol}$, on the Rossby number $R_o$. All rotators with Ro smaller than 0.03$\\pm$0.01 converge to an activity level of $L_{H\\alpha}/L_{bol}$ = (1.27$\\pm$0.02) x 10$^{-4}$"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1611.09313","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"}