{"paper":{"title":"The ACS Nearby Galaxy Survey Treasury VIII. The Global Star Formation Histories of 60 Dwarf Galaxies in the Local Volume","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"2), (2) University of Minnesota, (3) CfA Fellow, (4) Raytheon, (5) New Mexico State University, (6) University of Tasmania, (7) Russian Academy of Sciences, (8) Steward Observatory, 9), (9) Hubble Fellow), Andrew Cole (6), Andrew E. Dolphin (4), Anil C. Seth (3), Benjamin F. Williams (1), Daniel R. Weisz (1, Dennis Zaritsky (8) ((1) University of Washington, Evan D. Skillman (2), Harvard-Smithsonian Center for Astrophysics, Igor D. Karachentsev (7), Jon Holtzman (5), Julianne J. Dalcanton (1), Karoline M. Gilbert (1, Keith Rosema (1), Kristen B. W. McQuinn (2), Stephanie M. Gogarten (1), University of Arizona","submitted_at":"2011-01-05T21:03:08Z","abstract_excerpt":"We present uniformly measured star formation histories (SFHs) of 60 nearby (D~4Mpc) dwarf galaxies based on CMDs of resolved stellar populations from images taken with HST as part of the ACS Nearby Galaxy Survey Treasury program (ANGST). This volume-limited sample contains 12 dSph/dE, 5 dwarf spiral, 28 dI, 12 transition, and 3 tidal dwarf galaxies. From the best fit SFHs we find three significant results: (1) the average dwarf galaxy formed >50% of its stars by z~2 and 60% of its stars by z~1, regardless of current morphological type; (2) the mean SFHs of dIs, dTrans, and dSphs are similar ov"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1101.1093","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"}