{"paper":{"title":"Understanding star formation in molecular clouds II. Signatures of gravitational collapse of IRDCs","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"(2) MPIfR, (3) Zentrum fuer Astronomie der Universitaet Heidelberg, (4) Astrophysics Group, (5) I. Physik. Institut, (6) School of Physics, (7) Research School of Astronomy & Astrophysics, Astronomy, Australia), Australian National University, Bonn, Canberra, Cardiff University, C. Federrath (7) ((1) Universite Bordeaux, France, Germany, Heidelberg, Inst. fuer Theor. Astrophysik, LAB/OASU, N. Peretto (6), N. Schneider (1), P. Tremblin (4), R. Simon (5), R.S. Klessen (3), S. Bontemps (1), T. Csengeri (2), UK, Universitaet zu Koeln, University of Exeter, V. Ossenkopf (5)","submitted_at":"2014-06-12T07:31:03Z","abstract_excerpt":"We analyse column density and temperature maps derived from Herschel dust continuum observations of a sample of massive infrared dark clouds (G11.11-0.12, G18.82-0.28, G28.37+0.07, G28.53-0.25). We disentangle the velocity structure of the clouds using 13CO 1-0 and 12CO 3-2 data, showing that these IRDCs are the densest regions in massive giant molecular clouds and not isolated features. The probability distribution function (PDF) of column densities for all clouds have a power-law distribution over all (high) column densities, regardless of the evolutionary stage of the cloud: G11.11-0.12, G1"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1406.3134","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"}