{"paper":{"title":"Terzan 5: an alternative interpretation for the split horizontal branch","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.GA","authors_text":"A. D'Ercole, E. Vesperini, F. D'Antona, M. Di Criscienzo, P. Ventura, R. Carini, V. Caloi","submitted_at":"2010-04-20T12:27:49Z","abstract_excerpt":"We consider the horizontal branch (HB) of the Globular Cluster Terzan 5, recently shown to be split  into two parts, the fainter one (delta M_K ~ 0.3mag)  having a lower metallicity than the more luminous. Both features  show that it contains at least two stellar populations.  The separation in magnitude has been ascribed to an age difference of  ~6 Gyr and interpreted as the result of an atypical evolutionary history for this cluster. We show that the observed HB morphology is also consistent with a model in which the bright HB  is composed of second generation stars that are metal enriched a"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1004.3426","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"}