{"paper":{"title":"Dissecting cold gas in a high-redshift galaxy using a lensed background quasar","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"A. Smette, F. Courbin, J. Hennawi, J.-K. Krogager, J. M. O'Meara, J. P. U. Fynbo, J. X. Prochaska, M. Fumagalli, M. Rafelski, P. Boiss\\'e, P. Noterdaeme, S. Balashev","submitted_at":"2018-09-04T15:42:52Z","abstract_excerpt":"We present a study of cold gas absorption from a damped Lyman-$\\alpha$ absorber (DLA) at redshift $z_{\\rm abs}=1.946$ towards two lensed images of the quasar J144254.78+405535.5 at redshift $z_{\\rm QSO} = 2.590$. The physical separation of the two lines of sight at the absorber redshift is $d_{\\rm abs}=0.7$~kpc based on our lens model. We observe absorption lines from neutral carbon and H$_2$ along both lines of sight indicating that cold gas is present on scales larger than $d_{\\rm abs}$. We measure column densities of HI to be $\\log N(\\rm H\\,\\i) = 20.27\\pm0.02$ and $20.34\\pm0.05$ and of H$_2"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1809.01053","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"}