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SUMMARY:Contributory: Model-Independent Evidence for a Localized Anomaly i
 n the Late-Time Expansion History
DTSTART;VALUE=DATE-TIME:20261117T071500Z
DTEND;VALUE=DATE-TIME:20261117T073000Z
DTSTAMP;VALUE=DATE-TIME:20261027T020531Z
UID:indico-contribution-963@indico.narit.or.th
DESCRIPTION:Speakers: Shibendu Gupta Choudhury (Indian Institute of Astrop
 hysics)\nIn this talk\, I present a model-independent spline reconstructio
 n of cosmological distances using latest low-redshift datasets to investig
 ate the late-time expansion history of the Universe. Comparing the reconst
 ructed expansion history with the prediction of the Planck $\\Lambda$CDM m
 odel\, I demonstrate a localized deviation over a certain redshift interva
 l which reaches a maximum significance of approximately 3.5$\\sigma$ near 
 $z=0.47$. I further demonstrate that this feature persists under substanti
 al variations of the reconstruction methodology\, dataset composition and 
 sound-horizon calibration. I argue using mock analyses that the reconstruc
 tion is unbiased and that the observed anomaly is unlikely to arise from r
 econstruction bias or miscalibrated uncertainties. If confirmed by future 
 observations\, this localized feature could point to previously unrecogniz
 ed late-time physics or reveal subtle inconsistencies between early and la
 te Universe cosmological probes.\n\nhttps://indico.narit.or.th/event/234/c
 ontributions/963/
LOCATION:Pattaya\, Thailand D Varee Jomtien Beach Pattaya Hotel
URL:https://indico.narit.or.th/event/234/contributions/963/
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