{"paper":{"title":"The UV spectral slope beta and stellar population of most active star-forming galaxies at z~4","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Satoshi Yamanaka, Toru Yamada","submitted_at":"2019-04-02T12:35:31Z","abstract_excerpt":"We investigate the stellar population of star-forming galaxies at $z \\sim 4$ by focusing on their slope of rest-frame ultraviolet (UV) continuum, $\\beta$ where $f_{\\lambda} \\propto \\lambda^{\\beta}$. We investigate the sample of bright Lyman Break Galaxies (LBGs) with $i' \\leq 26.0$ in the Subaru/XMM-Newton Deep Survey field by using the SED fitting analysis. We find that the apparently redder ($\\beta_{\\mathrm{obs}} > -1.73$) LBGs tend to be dusty ($\\mathrm{Av} > 1.0$), have the young stellar population ($\\beta_{\\mathrm{int}} < -2.42$), and the intrinsically active star-forming galaxies (SFR $\\"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1904.01373","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"}