# The Hubble Constant

@article{Freedman2010TheHC, title={The Hubble Constant}, author={Wendy L. Freedman and Barry F. Madore}, journal={Annual Review of Astronomy and Astrophysics}, year={2010}, volume={48}, pages={673-710} }

Considerable progress has been made in determining the Hubble constant over the past two decades. We discuss the cosmological context and importance of an accurate measurement of the Hubble constant, focusing on six high-precision distance-determination methods: Cepheids, tip of the red giant branch, maser galaxies, surface brightness fluctuations, the Tully-Fisher relation, and Type Ia supernovae. We discuss in detail known systematic errors in the measurement of galaxy distances and how to…

## 262 Citations

### Cosmology and the Hubble Constant: On the Megamaser Cosmology Project (MCP)

- PhysicsProceedings of the International Astronomical Union
- 2012

Abstract The Hubble constant H0 describes not only the expansion of local space at redshift z ~ 0, but is also a fundamental parameter determining the evolution of the universe. Recent measurements…

### A measurement of the Hubble constant from Type II supernovae

- Physics
- 2020

Progressive increases in the precision of the Hubble-constant measurement via Cepheid-calibrated Type Ia supernovae (SNe Ia) have shown a discrepancy of $\sim 4.4\sigma$ with the current value…

### A 2.4% DETERMINATION OF THE LOCAL VALUE OF THE HUBBLE CONSTANT

- Physics
- 2016

We use the Wide Field Camera 3 (WFC3) on the Hubble Space Telescope (HST) to reduce the uncertainty in the local value of the Hubble constant from 3.3% to 2.4%. The bulk of this improvement comes…

### A Measurement of the Hubble Constant Using Galaxy Redshift Surveys

- Physics
- 2017

We perform a measurement of the Hubble constant, H0, using the latest baryonic acoustic oscillation (BAO) measurements from galaxy surveys of 6dFGS, SDSS DR7 Main Galaxy Sample, BOSS DR12 sample, and…

### Cosmic variance of the local Hubble flow in large-scale cosmological simulations

- Physics
- 2014

The increasing precision in the determination of the Hubble parameter has reached a per cent level at which large-scale cosmic flows induced by inhomogeneities of the matter distribution become…

### An Analytical Estimate of the Hubble Constant

- Physics
- 2015

Currently the present-time value of the Hubble constant is estimated through finding the optimum fit to the observationally measured data. Here, assuming a flat universe with zero cosmological…

### Measuring the Hubble constant with observations of water-vapor megamasers

- PhysicsProceedings of the International Astronomical Union
- 2012

Abstract To constrain models of dark energy, a precise measurement of the Hubble constant, H0, provides a powerful complement to observations of the cosmic microwave background. Recent, precise…

### HUBBLE CONSTANT, LENSING, AND TIME DELAY IN RELATIVISTIC MODIFIED NEWTONIAN DYNAMICS

- Physics
- 2013

The time delay in galaxy gravitational lensing systems has been used to determine the value of the Hubble constant. As with other dynamical phenomena on the galaxy scale, dark matter is often invoked…

### THE CARNEGIE HUBBLE PROGRAM

- Physics
- 2011

We present an overview of and preliminary results from an ongoing comprehensive program that has a goal of determining the Hubble constant to a systematic accuracy of ±2%. As part of this program, we…

### Determining the Hubble constant using giant extragalactic H ii regions and H ii galaxies

- Physics
- 2012

We report the first results of a long-term programme aiming to provide accurate independent estimates of the Hubble constant (H0) using the L(Hβ)–σ distance estimator for giant extragalactic H ii…

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