{"paper":{"title":"H{\\alpha} photometry of low mass stars in 47 Tucanae: chromospheric activity and exotica","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"G. Beccari, G. de Marchi, L. Pasquini, N. Panagia","submitted_at":"2013-10-24T16:59:26Z","abstract_excerpt":"We have used archival Hubble Space Telescope observations obtained with the Advanced Camera for Surveys to study the H{\\alpha} emission properties of main sequence stars in the globular cluster 47 Tucanae. Using a combination of multi-band observations in the F606W, F814W and F658N bands, we search for stars showing H{\\alpha} excess emission. An accurate photometric measurement of their H{\\alpha} equivalent width allows us to identify objects with large H{\\alpha} emission, which we attribute to mass accretion rather than enhanced chromospheric activity. The spatial position of some of these st"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1310.6673","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"}