The Hubble Constant

By W. Freedman, B. Madore. 2010

284 citations recorded by the source corpus.

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 minimize them. Our best current estimate of the Hubble constant is 73±2 (random) ± 4 (systematic) km s−1 Mpc−1. The importance of improved accuracy in the Hubble constant will increase over the next decade with new missions and experiments designed to increase the precision in other cosmological parameters. We outline the steps that will be required to deliver a value of the Hubble constant to 2% systematic uncertainty and discuss the constraints on other cosmological parameters that will then be possible with such ac...

Subfields: Astronomy and Astrophysics, Instrumentation

View Paper: https://www.semanticscholar.org/paper/fa2a114b4dd9e135550e7ac73f2bf254362717ef

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Astronomy and Astrophysics

In Instrumentation

Citations in the corpus

Clarifying the Hubble constant tension with a Bayesian hierarchical model of the local distance ladder (2017, background): “and Freedman & Madore 2010 for a review).”
The Carnegie Supernova Project: Absolute Calibration and the Hubble Constant (2018, background): “Cepheids have the advantage of a long history in the literature and have well understood systematics (Madore & Freedman 1991; Sandage & Tammann 2006; Freedman & Madore 2010).”
New physics in light of the H0 tension: An alternative view (2019, background): “[2] W.”
THE AGES OF 55 GLOBULAR CLUSTERS AS DETERMINED USING AN IMPROVED METHOD ALONG WITH COLOR–MAGNITUDE DIAGRAM CONSTRAINTS, AND THEIR IMPLICATIONS FOR BROADER ISSUES (2013, background): “…are based on stars that have −1.8 <∼ [Fe/H] <∼ −1.2 (with only a few outliers), are represented by the dashed line and the attached errorbar if it is assumed that the true distance modulus of the LMC is 18.50 mag (Freedman & Madore 2010, Laney, Joner, & Pietrzyński 2012, Molinaro et al. 2012).”
H 0 revisited (2013, background): “Direct astrophysical measurements of the Hubble constant have a checkered history (see, for example, the reviews by Tammann, Sandage and Reindl 2008; Freedman and Madore 2010).”
THE CARNEGIE SUPERNOVA PROJECT: LIGHT-CURVE FITTING WITH SNooPy (2010, background): “Currently, there has been a marked improvement in the error budget for H0, having been reduced from ±10% (Freedman et al. 2001) to ±5% (Riess et al. 2009; Freedman & Madore 2010).”
The Carnegie-Chicago Hubble Program. VIII. An Independent Determination of the Hubble Constant Based on the Tip of the Red Giant Branch (2019, background): “…to 10% was made possible with the availability of the Hubble Space Telescope (HST; Freedman et al. 2001), and more recently, the uncertainties have been reduced to less than 5% by a number of investigations (e.g., Freedman & Madore 2010; Freedman et al. 2012; Riess et al. 2016; Suyu et al. 2017).”
Observational probes of cosmic acceleration (2012, background): “Freedman and Madore (2010) review recent progress in H0 determinations and prospects for future improvements; the past five years have seen substantial advances in both statistical precision and reduction of systematic uncertainties.”
A 2.4% DETERMINATION OF THE LOCAL VALUE OF THE HUBBLE CONSTANT (2016, background): “L) relation (also known as the Leavitt law; Leavitt & Pickering 1912), and other sources used independently or in concert to construct distance ladders (see Freedman & Madore 2010; Livio & Riess 2013, for recent reviews).”
ASTROPHYSICAL TESTS OF MODIFIED GRAVITY: CONSTRAINTS FROM DISTANCE INDICATORS IN THE NEARBY UNIVERSE (2012, methodology): “Outside the Local Group, cepheid distances have been measured to over 50 galaxies (see the review by Freedman & Madore 2010 for more details).”
A 3% SOLUTION: DETERMINATION OF THE HUBBLE CONSTANT WITH THE HUBBLE SPACE TELESCOPE AND WIDE FIELD CAMERA 3 (2011, unknown): “The most precise measurements of H0 have come from distance ladders which calibrate the luminosities of nearby SNe Ia through Hubble Space Telescope (HST) observations of Cepheids in their host galaxies (see Freedman & Madore 2010 for a review).”
A buyer’s guide to the Hubble constant (2021, unknown): “Hence, any curvature in the Leavitt law, or mis-calibrated metallicity dependency could bias distances (see for example Freedman and Madore 2010).”
TWO ACCURATE TIME-DELAY DISTANCES FROM STRONG LENSING: IMPLICATIONS FOR COSMOLOGY (2012, background): “Lenses are thus highly complementary to other cosmographic probes, particularly the CMB and SN (see also, e.g., Linder 2011; Das & Linder 2012).”
CARNEGIE HUBBLE PROGRAM: A MID-INFRARED CALIBRATION OF THE HUBBLE CONSTANT (2012, methodology): “This plot supersedes earlier versions given in Freedman & Madore (2010) and Freedman et al. (2011) as it now uses the final magnitudes and PL fits for the entire LMC sample given in Scowcroft et al. (2011, 2012) and extends the Milky Way sample to significantly higher metallicities using the newly…”