{"paper":{"title":"Constraining $\\Omega_M$ and Dark Energy with Gamma-Ray Bursts","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"D. Xu (NJU), E. W. Liang, Z. G. Dai","submitted_at":"2004-07-23T07:29:24Z","abstract_excerpt":"An $E_{\\gamma,{\\rm jet}}\\propto {E'_p}^{1.5}$ relationship with a small scatter for current $\\gamma$-ray burst (GRB) data was recently reported, where $E_{\\gamma,{\\rm jet}}$ is the beaming-corrected $\\gamma$-ray energy and $E'_p$ is the $\\nu F_\\nu$ peak energy in the local observer frame. By considering this relationship for a sample of 12 GRBs with known redshift, peak energy, and break time of afterglow light curves, we constrain the mass density of the universe and the nature of dark energy. We find that the mass density $\\Omega_M=0.35\\pm^{0.15}_{0.15}$ (at the $1\\sigma$ confident level) fo"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0407497","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"}