{"paper":{"title":"Offsets between member galaxies and dark matter in clusters: a test with the Illustris simulation","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Annalisa Pillepich, David Wittman, Dylan R. Nelson, Karen Y. Ng, Lars Hernquist, William A. Dawson","submitted_at":"2017-02-28T19:00:00Z","abstract_excerpt":"Dark matter with a non-zero self-interacting cross section ($\\sigma_{\\rm SIDM}$) has been posited as a solution to a number of outstanding astrophysical mysteries. Many studies of merging galaxy clusters have given constraints on $\\sigma_{\\rm SIDM}$ based on the spatial offset between the member galaxy population and the dark matter distribution. Assuming $\\sigma_{\\rm SIDM} = 0$, how likely is it for us to see the galaxy-DM offset values observed in merging clusters of galaxies? To answer this question, we formulate a hypothesis test using data from Illustris, a $\\Lambda$CDM cosmological simul"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1703.00010","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"}