{"paper":{"title":"Pad\\'e semi-cosmographic reconstruction of residual dark energy in decaying dark matter cosmology: DESI DR2 BAO constraints and mock 21 cm forecasts","arxiv_id":"2603.23247","primary_cat":"astro-ph.CO","submitted_at":"2026-03-24T14:15:33+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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obtained by subtracting the contributions of DDM, baryons, and radiation from the Pad\\'e approximation to the expansion history under the assumptions of flat FLRW cosmology and the standard Friedmann equations.","hedge":{"p":1.0,"label":"asserted"},"own_p":0.72,"main_claim_p":0.05,"quantitative":false,"quantitative_p":0.05,"role_probabilities":{"gap":0.0,"method":0.99,"result":0.0,"background":0.0,"limitation":0.0,"future_work":0.0,"contribution":0.01,"interpretation":0.0}},{"i":2,"p":0.98,"id":"s2","own":true,"role":"method","text":"Cosmological observables computed from these semi-cosmographic quantities are fitted to the data to reconstruct cosmological evolution.","hedge":{"p":0.98,"label":"asserted"},"own_p":0.65,"main_claim_p":0.05,"quantitative":false,"quantitative_p":0.03,"role_probabilities":{"gap":0.0,"method":0.98,"result":0.0,"background":0.0,"limitation":0.0,"future_work":0.0,"contribution":0.02,"interpretation":0.0}},{"i":3,"p":0.66,"id":"s3","own":true,"role":"contribution","text":"We present two separate analyses.","hedge":{"p":0.87,"label":"asserted"},"own_p":0.82,"main_claim_p":0.02,"quantitative":false,"quantitative_p":0.42,"role_probabilities":{"gap":0.0,"method":0.34,"result":0.0,"background":0.0,"limitation":0.0,"future_work":0.0,"contribution":0.66,"interpretation":0.0}},{"i":4,"p":0.5,"id":"s4","own":true,"role":"contribution","text":"First, we perform a data fit to the current DESI DR2 BAO measurements.","hedge":{"p":0.98,"label":"asserted"},"own_p":0.94,"main_claim_p":0.03,"quantitative":false,"quantitative_p":0.12,"role_probabilities":{"gap":0.0,"method":0.5,"result":0.0,"background":0.0,"limitation":0.0,"future_work":0.0,"contribution":0.5,"interpretation":0.0}},{"i":5,"p":0.56,"id":"s5","own":true,"role":"contribution","text":"Second, we report a forecast based on an optimistic mock 21\\,cm intensity-mapping power spectrum at $z\\simeq 1.75$ for a SKA1-MID-like instrument, used jointly with the DESI DR2 BAO data.","hedge":{"p":0.96,"label":"asserted"},"own_p":0.89,"main_claim_p":0.07,"quantitative":true,"quantitative_p":0.92,"role_probabilities":{"gap":0.0,"method":0.44,"result":0.0,"background":0.0,"limitation":0.0,"future_work":0.0,"contribution":0.56,"interpretation":0.0}},{"i":6,"p":0.83,"id":"s6","own":true,"role":"interpretation","text":"The forecast serves as proof of concept to demonstrate a possible improvement in model constraints when measurements of the 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