{"paper":{"title":"The CMBR fluctuations from HI perturbations prior to reionization","arxiv_id":"astro-ph/0401206","primary_cat":"astro-ph","submitted_at":"2004-01-12T16:12:51+00:00","version_compiled":"v2"},"notice":"Every quoted sentence is the authors' text from the arXiv listing abstract. Labels and probabilities are the outputs of classifier-1.13.0 on the question bank abstract-p1-20260923, exactly as returned. 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fluctuations.","hedge":{"p":0.98,"label":"asserted"},"own_p":0.08,"main_claim_p":0.04,"quantitative":false,"quantitative_p":0.04,"role_probabilities":{"gap":0.36,"method":0.01,"result":0.0,"background":0.6,"limitation":0.0,"future_work":0.0,"contribution":0.03,"interpretation":0.0}},{"i":2,"p":0.88,"id":"s2","own":false,"role":"background","text":"Brightness temperature fluctuations arise from two sources (1.) fluctuations in the spin temperature, and (2.) fluctuations in the HI optical depth, both of which are caused by density perturbations.","hedge":{"p":1.0,"label":"asserted"},"own_p":0.14,"main_claim_p":0.06,"quantitative":false,"quantitative_p":0.25,"role_probabilities":{"gap":0.0,"method":0.04,"result":0.01,"background":0.88,"limitation":0.0,"future_work":0.0,"contribution":0.07,"interpretation":0.0}},{"i":3,"p":0.81,"id":"s3","own":true,"role":"contribution","text":"For the spin temperature, we investigate in detail its evolution in the presence of HI fluctuations.","hedge":{"p":0.67,"label":"asserted"},"own_p":0.9,"main_claim_p":0.03,"quantitative":false,"quantitative_p":0.03,"role_probabilities":{"gap":0.0,"method":0.19,"result":0.0,"background":0.0,"limitation":0.0,"future_work":0.0,"contribution":0.81,"interpretation":0.0}},{"i":4,"p":0.8,"id":"s4","own":true,"role":"result","text":"For the optical depth, we find that it is affected by density perturbations both directly and through peculiar velocities which move the absorption features around in frequency.","hedge":{"p":1.0,"label":"asserted"},"own_p":0.92,"main_claim_p":0.1,"quantitative":false,"quantitative_p":0.05,"role_probabilities":{"gap":0.0,"method":0.01,"result":0.8,"background":0.0,"limitation":0.0,"future_work":0.0,"contribution":0.19,"interpretation":0.0}},{"i":5,"p":0.93,"id":"s5","own":true,"role":"result","text":"The latter effect, which has not been included in earlier studies, is similar to the redshift space distortion seen in galaxy surveys and this can cause 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