Date Published | H0 km·s−1·Mpc−1 | Observer | Remarks/Methodology |
2020-09 |
| S. Mukherjee, et al. | Gravitational waves, assuming that the transient ZTF19abanrh found by the Zwicky Transient Facility is the optical counterpart to GW190521. Independent of distance ladders and the cosmic microwave background. |
2020-02 |
| Megamaser Cosmology Project | Geometric distance measurements to Megamaser-hosting galaxies. Independent of distance ladders and the cosmic microwave background. |
2019-10 |
| STRIDES | Modelling the mass distribution & time delay of the lensed quasar DES J0408-5354. |
2019-09 |
| SHARP H0LiCOW | Modelling three galactically lensed objects and their lenses using ground-based adaptive optics and the Hubble Space Telescope |
2019-08 |
| K. Dutta, et al. | This is obtained analyzing low-redshift cosmological data within ΛCDM model. The datasets used are Type-Ia Supernova, Baryon Acoustic Oscillations, Time-Delay measurements using Strong-Lensing, measurements using Cosmic Chronometers and growth measurements from large scale structure observations. |
2019-08 |
| M. J. Reid, D. W. Pesce, A. G. Riess | Measuring the distance to Messier 106 using its supermassive black hole, combined with measurements of eclipsing binaries in the Large Magellanic Cloud. |
2019-07 |
| Hubble Space Telescope | Distances to red giant stars are calculated using the tip of the red-giant branch (TRGB) distance indicator. |
2019-07 |
| H0LiCOW collaboration | Updated observations of multiply imaged quasars, now using six quasars, independent of the cosmic distance ladder and independent of the cosmic microwave background measurements. |
2019-07 |
| LIGO and Virgo detectors | Uses radio counterpart of GW170817, combined with earlier gravitational wave and electromagnetic data. |
2019-03 |
| Fermi-LAT | Gamma ray attenuation due to extragalactic light. Independent of the cosmic distance ladder and the cosmic microwave background. |
2019-03 |
| Hubble Space Telescope | Precision HST photometry of Cepheids in the Large Magellanic Cloud (LMC) reduce the uncertainty in the distance to the LMC from 2.5% to 1.3%. The revision increases the tension with CMB measurements to the 4.4σ level (P = 99.999% for Gaussian errors), raising the discrepancy beyond a plausible level of chance. Continuation of a collaboration known as Supernovae, for the Equation of State of Dark Energy (SHoES). |
2019-02 |
| Joseph Ryan, et al. | Quasar angular size and baryon acoustic oscillations, assuming a flat LambdaCDM model. Alternative models result in different (generally lower) values for the Hubble constant. |