{"paper":{"title":"Spectroscopic decomposition of NGC 3521: unveiling the properties of the bulge and disc","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"2), (2) Max Planck Institute for Extraterrestrial Physics, 3), (3) University Observatory Munich, (4) McDonald Observatory, (5) Dipartimento di Fisica e Astronomia \"G. Galilei\", Garching, Germany, Italy), Lodovico Coccato (1), Lorenzo Morelli (5) ((1) European Southern Observatory, Maximilian H. Fabricius (2, Munich, Niv Drory (4), Padova, Peter Erwin (2), Ralf Bender (3, Roberto P. Saglia (2, Texas, The University of Texas at Austin, Universit\\`a di Padova, USA","submitted_at":"2018-03-09T19:00:05Z","abstract_excerpt":"We study the kinematics and the stellar populations of the bulge and disc of the spiral galaxy NGC 3521. At each position in the field of view, we separate the contributions of the bulge and the disc from the total observed spectrum and study their kinematics, age, and metallicities independently. Their properties are clearly distinct: the bulge rotates more slowly, has a higher velocity dispersion, and is less luminous than the disc. We identify three main populations of stars in NGC 3521: old ($\\geq7$ Gyr), intermediate ($\\approx$ 3 Gyr), and young ($\\leq$1 Gyr). The mass and light of NGC 35"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1803.03653","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"}