{"paper":{"title":"Searching for a Cosmological Preferred Axis: Union2 Data Analysis and Comparison with Other Probes","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc","hep-ph","hep-th"],"primary_cat":"astro-ph.CO","authors_text":"I. Antoniou, L. Perivolaropoulos (U. of Ioannina)","submitted_at":"2010-07-25T19:54:44Z","abstract_excerpt":"We review, compare and extend recent studies searching for evidence for a preferred cosmological axis. We start from the Union2 SnIa dataset and use the hemisphere comparison method to search for a preferred axis in the data. We find that the hemisphere of maximum accelerating expansion rate is in the direction $(l,b)=({309^\\circ}^{+23^\\circ}_{-3^\\circ}, {18^\\circ}^{+11^\\circ}_{-10^\\circ})$ ($\\omm=0.19$) while the hemisphere of minimum acceleration is in the opposite direction $(l,b)=({129^\\circ}^{+23^\\circ}_{-3^\\circ},{-18^\\circ}^{+10^\\circ}_{-11^\\circ})$ ($\\omm=0.30$). The level of anisotrop"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1007.4347","kind":"arxiv","version":3},"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"}