{"paper":{"title":"No Assembly Required: Mergers are Mostly Irrelevant for the Growth of Low-mass Dwarf Galaxies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.GA","authors_text":"Alex Fitts, Andrew Wetzel, Chris Hayward, Claude-Andr\\'e Faucher-Gigu\\`ere, Coral Wheeler, Daniel R. Weisz, Du\\v{s}an Kere\\v{s}, Eliot Quataert, James S. Bullock, Kareem El-Badry, Michael Boylan-Kolchin, Philip F. Hopkins","submitted_at":"2018-01-18T19:00:00Z","abstract_excerpt":"We investigate the merger histories of isolated dwarf galaxies based on a suite of 15 high-resolution cosmological zoom-in simulations, all with masses of $M_{\\rm halo} \\approx 10^{10}\\,{\\rm M}_{\\odot}$ (and M$_\\star\\sim10^5-10^7\\,{\\rm M}_{\\odot}$) at $z=0$, from the Feedback in Realistic Environments (FIRE) project. The stellar populations of these dwarf galaxies at $z=0$ are formed essentially entirely \"in situ\": over 90$\\%$ of the stellar mass is formed in the main progenitor in all but two cases, and all 15 of the galaxies have >70$\\%$ of their stellar mass formed in situ. Virtually all ga"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1801.06187","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"}