{"paper":{"title":"Magellan/M2FS Spectroscopy of the Reticulum 2 Dwarf Spheroidal Galaxy","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Edward W. Olszewski, John I. Bailey III, Mario Mateo, Matthew G. Walker, N. Wyn Evans, Sergey E. Koposov, Vasily Belokurov","submitted_at":"2015-04-13T03:58:21Z","abstract_excerpt":"We present results from spectroscopic observations with the Michigan/Magellan Fiber System (M2FS) of 182 stellar targets along the line of sight to the newly-discovered `ultrafaint' object Reticulum 2 (Ret 2). For 38 of these targets, the spectra are sufficient to provide simultaneous estimates of line-of-sight velocity ($v_{\\rm los}$, median random error $\\delta_{v_{\\rm los}}=1.3$ km s$^{-1}$), effective temperature ($T_{\\rm eff}$, $\\delta_{T_{\\rm eff}}=464$ K), surface gravity ($\\log g$, $\\delta_{\\rm logg}=0.54$ dex) and iron abundance ([Fe/H], $\\delta_{\\mathrm{[Fe/H]}}=0.45$ dex). We use th"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1504.03060","kind":"arxiv","version":2},"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"}