{"paper":{"title":"Electron Excitation of High Dipole Moment Molecules Reexamined","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"(2) Max Planck Institut f\\\"ur Radioastronomie, California Institute of Technology, Germany), Jens Kauffmann (2) ((1) Jet Propulsion Laboratory, Paul F. Goldsmith (1), USA","submitted_at":"2017-08-24T20:57:28Z","abstract_excerpt":"Emission from high-dipole moment molecules such as HCN allows determination of the density in molecular clouds, and is often considered to trace the \"dense\" gas available for star formation. We assess the importance of electron excitation in various environments. The ratio of the rate coefficients for electrons and H$_2$ molecules, $\\simeq$10$^5$ for HCN, yields the requirements for electron excitation to be of practical importance if $n({\\rm H}_2) \\leq\\ 10^{5.5} ~ \\rm cm^{-3}$ and $X({\\rm e}^-) \\geq\\ 10^{-5}$, where the numerical factors reflect critical values $n_{\\rm{}c}({\\rm H_2})$ and $X^"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1708.07553","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"}