{"paper":{"title":"Molecular Hydrogen in the Damped Ly alpha Absorber of Q1331+170","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"David M. Meyer, Jian Ge, Jill Bechtold, Jun Cui","submitted_at":"2005-06-30T18:02:39Z","abstract_excerpt":"We used HST/STIS to obtain the spectrum of molecular hydrogen associated with the damped Ly$\\alpha$ system at $z_{\\rm abs}=1.7765$ toward the quasar Q1331+170 at $z_{\\rm em}=2.084$. Strong ${\\rm H}_2$ absorption was detected, with a total ${\\rm H}_2$ column density of $N({\\rm H}_2)=(4.45\\pm 0.36)\\times 10^{19} {\\rm cm^{-2}}$.The molecular hydrogen fraction is $f_{{\\rm H}_2}=\\frac{2N_{\\rm H_2}}{N_{\\rm HI}+2N_{\\rm H_2}}=(5.6\\pm 0.7)%$, which is the greatest value reported so far in any redshifted damped Ly$\\alpha$ system. This results from the combined effect of a relatively high dust-to-gas rat"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0506766","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/astro-ph/0506766/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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"}