Bulletin of the American Physical Society
APS April Meeting 2019
Volume 64, Number 3
Saturday–Tuesday, April 13–16, 2019; Denver, Colorado
Session G16: Cosmology with Gravitational Waves
8:30 AM–10:06 AM,
Sunday, April 14, 2019
Sheraton Room: Grand Ballroom I
Sponsoring Units: DAP DGRAV
Chair: Ken herner, Fermilab
Abstract: G16.00006 : A Possible Solution to the Disagreement about the Hubble Constant
9:30 AM–9:42 AM
F R Tangherlini
F R Tangherlini
Recently the author  has proposed that a solution to the disagreement between the Planck collaboration CMB lower H0 value, together with the BOSS collaboration BAO equally lower value, and the significantly higher value found by the SHOES collaboration cosmic distance ladder (CDL) study, arises from the CMB and BAO values being for a decelerating universe, rather than an accelerating universe. In contrast, the CDL H0 is for an accelerating universe. To check , it is shown that when the deceleration parameter q0 = - 0.55 in the CDL expression for H0 is replaced by q0 = 0.5 for the decelerating Einstein de Sitter (EdS) universe, CDL H0 agrees with CMB and BAO values for z = 0.16, and z = 0.17, respectively. Earlier , it was shown that an EdS universe, with a dark energy that, instead of having a negative pressure, has a non-dispersive index of refraction n ≈1.5, for 0 ≤ z ≤ 0.6, so that the speed of light through intergalactic, but not galactic, space is ~2c/3, yields an alternative explanation for the increased apparent magnitude of the SNe Ia, and increased distance to the BAO "standard ruler." An astronomical test based on discordant redshifts has been proposed .
1 F. R. Tangherlini, J. Mod. Phys., 9, 1827 (2018); 2 6, 78 (2015); 3 8, 622 (2017).
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