SIMBAD references

We revisit the claimed tension, or lack thereof, of measured values of the Hubble-Lemaitre parameter H₀ from cosmic microwave background (CMB) data and low-redshift indicators. Baryon acoustic oscillations (BAOs) rely on the scale of the sound horizon at recombination r_s to convert angular measurements into angular-diameter distances, so fixing r_s from CMB measurements already constrains H₀. If departures from concordance cosmology are to be constrained, truly independent measurements of H₀ are needed. We use the angular-diameter distances to three time-delay lenses from the H0LiCOW collaboration to calibrate the distance ladder, combine them with relative distances from supernovae Ia and BAOs, leaving r_s completely free, and provide the inferred coefficients (q₀, j₀, s₀) in the polynomial expansion of H(z). We obtain H₀r_s = (9895 ± 161) km s^–1 and H₀ = (72 ± 7) km s^–1 Mpc^–1. Combined with H₀ from H0LiCOW, then r_s = (137 ± 4.5) Mpc is consistent with previous work and systematically lower than the CMB-inferred value. Our results are independent of the adopted cosmology, and removing supernovae with z < 0.1 has a negligible effect.