Determining from distance sum rule combining gamma-ray bursts with observational Hubble data and strong gravitational lensing
arXiv:2412.18493 · doi:10.1051/0004-6361/202553824
Abstract
Model-independent bounds on the Hubble constant are important to shed light on cosmological tensions. We work out a model-independent analysis based on the sum rule, which is applied to late- and early-time data catalogs to determine . Through the model-independent Bézier interpolation of the observational Hubble data (OHD) and assuming a flat universe, we reconstruct the dimensionless distances of the sum rule and apply them to strong lensing data to derive constraints on . Next, we extend this method to the high-redshift domain including, in other two separated analyses, gamma-ray burst (GRB) data sets from the well-established Amati and Combo correlations. In all three analyses, our findings agree at level with the determined from type Ia supernovae (SNe Ia), and only at level with the measurement derived from the cosmic microwave background (CMB) radiation. Our method evidences that the bounds on are significantly affected by strong lensing data, which favor the local measurement from SNe Ia. Including GRBs causes only a negligible decrease in the value of . This may indicate that GRBs can be used to trace the expansion history and, in conjunction with CMB measurements, may heal the Hubble tension and accommodate to the flat CDM paradigm purported by CMB data.
9 pages, 3 figures
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