{"paper":{"title":"Constraints on the progenitor system and the environs of SN 2014J from deep radio observations","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"A. Alberdi, C. Fransson, C.-I. Bjornsson, E. Ros, I. Marti-Vidal, J.C. Guirado, J.M. Marcaide, M.A. Perez-Torres, M. Argo, P. Lundqvist, R. Beswick, S. Ryder, T.W.M. Muxlow, Z. Paragi","submitted_at":"2014-05-19T12:55:37Z","abstract_excerpt":"We report deep EVN and eMERLIN observations of the Type Ia SN 2014J in the nearby galaxy M 82. Our observations represent, together with JVLA observations of SNe 2011fe and 2014J, the most sensitive radio studies of Type Ia SNe ever. By combining data and a proper modeling of the radio emission, we constrain the mass-loss rate from the progenitor system of SN 2014J to $\\dot{M} \\lesssim 7.0\\times 10^{-10}\\, {\\rm M_{\\odot}\\, yr^{-1}}$ (3-$\\sigma$; for a wind speed of $100\\, {\\rm km s^{-1}}$). If the medium around the supernova is uniform, then $n_{\\rm ISM} \\lesssim 1.3 {\\rm cm^3}$ (3-$\\sigma$), "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1405.4702","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"}