{"paper":{"title":"The Cocoon Shocks of Cygnus A: Pressures and Their Implications for the Jets and Lobes","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Alastair C. Edge, Andrew J. Young, Bradford Snios, Brian R. McNamara, Chris Carilli, Daniel E. Harris, David A. Rafferty, Diana M. Worrall, John P. McKean, Judith H. Croston, Leith E. H. Godfrey, Mark Birkinshaw, Martijn de Vries, Martin J. Hardcastle, Michael W. Wise, Paul E. J. Nulsen, Ralph P. Kraft, Richard A. Perley, Robert A. Laing, Ryan T. Duffy, William G. Mathews","submitted_at":"2018-02-27T19:00:05Z","abstract_excerpt":"We use 2.0 Msec of Chandra observations to investigate the cocoon shocks of Cygnus A and some implications for its lobes and jet. Measured shock Mach numbers vary in the range 1.18-1.66 around the cocoon. We estimate a total outburst energy of $\\simeq 4.7\\times10^{60}\\rm\\ erg$, with an age of $\\simeq 2 \\times 10^{7}\\rm\\ yr$. The average postshock pressure is found to be $8.6 \\pm 0.3 \\times 10^{-10}\\rm\\ erg\\ cm^{-3}$, which agrees with the average pressure of the thin rim of compressed gas between the radio lobes and shocks, as determined from X-ray spectra. However, average rim pressures are f"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1802.10106","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"}