{"paper":{"title":"Constraint on the time variation of the fine-structure constant with the SDSS-III/BOSS DR12 quasar sample","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ph"],"primary_cat":"astro-ph.CO","authors_text":"Arturo Manchado, Carlos M. Guti\\'errez, D.A. Garc\\'ia-Hern\\'andez, David Schlegel, Donald P. Schneider, Francisco Prada, Franco D. Albareti, Isabelle P\\^aris, Jian Ge, Johan Comparat, Mart\\'in L\\'opez-Corredoira, Patrick Petitjean","submitted_at":"2015-01-03T13:06:01Z","abstract_excerpt":"From the Sloan Digital Sky Survey (SDSS) Data Release 12, which covers the full Baryonic Oscillation Spectroscopic Survey (BOSS) footprint, we investigate the possible variation of the fine-structure constant over cosmological time-scales. We analyse the largest quasar sample considered so far in the literature, which contains 13175 spectra (10363 from SDSS-III/BOSS DR12 + 2812 from SDSS-II DR7) with redshift $z<\\,$1. We apply the emission-line method on the [O III] doublet (4960, 5008 A) and obtain $\\Delta\\alpha/\\alpha= \\left(0.9 \\pm 1.8\\right)\\times10^{-5}$ for the relative variation of the "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1501.00560","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"}