{"paper":{"title":"21 cm Intensity Mapping","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.IM","authors_text":"Ahmed Legrouri, Alberto Vallinotto, Albert Stebbins, Avi Loeb, Bruce McWilliams, Chris Stoughton, Christophe Magneville, Christophe Yeche, Craig Hogan, David P. McGinnis, Dick Bond, Fritz DeJongh, Hassane Darhmaoui, Hee-Jong Seo, Jason H. Steffen, Jean-Marc Le Goff, Jeffrey B. Peterson, Jim Rich, John Bunton, John Marriner, Kermit Carlson, Kevin Bandura, Khalid Loudiyi, Kris Sigurdson, Marc Moniez, Mark Halpern, Matt Dobbs, Nathalie Palanque-Delabruille, Nick Gnedin, Peter T. Timbie, Ralph J. Pasquinelli, Reza Ansari, Roy Aleksan, Scott Dodelson, Stuart Wyithe, Tiehui Ted Liu, Tzu-Ching Chang, Ue-Li Pen, Uros Seljak, Vic Scarpine","submitted_at":"2009-02-18T10:33:08Z","abstract_excerpt":"Using the 21 cm line, observed all-sky and across the redshift range from 0 to 5, the large scale structure of the Universe can be mapped in three dimensions. This can be accomplished by studying specific intensity with resolution ~ 10 Mpc, rather than via the usual galaxy redshift survey. The data set can be analyzed to determine Baryon Acoustic Oscillation wavelengths, in order to address the question: 'What is the nature of Dark Energy?' In addition, the study of Large Scale Structure across this range addresses the questions: 'How does Gravity effect very large objects?' and 'What is the c"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0902.3091","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/0902.3091/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"}