Results 11 to 20 of about 114,791 (199)
Living Reviews in Relativity, 2015 I review the current state of determinations of the Hubble constant, which gives the length scale of the Universe by relating the expansion velocity of objects to their distance. There are two broad categories of measurements.
Neal Jackson
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Living Reviews in Relativity, 2007 I review the current state of determinations of the Hubble constant, which gives the length scale of the Universe by relating the expansion velocity of objects to their distance.
Jackson Neal
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Measuring the Hubble constant with a sample of kilonovae [PDF]
Nature Communications, 2020 Kilonovae observations can be used to out constraints on the Hubble constant (H0). Here, the authors show H0 measurements by combining light curves of four short gamma-ray burts with GW170817 are about a factor of 2-3 more precise than the standard-siren
Michael W. Coughlin +9 more
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Maximum Entropy Estimates of Hubble Constant from Planck Measurements [PDF]
EntropyA maximum entropy (ME) methodology was used to infer the Hubble constant from the temperature anisotropies in cosmic microwave background (CMB) measurements, as measured by the Planck satellite.
David P. Knobles, Mark F. Westling
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Annual Review of Astronomy and Astrophysics, 2010 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, and focus on six high-precision distance-determination
Barry F. Madore +7 more
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Is the Hubble Constant Scale-dependent? [PDF]
Gravitation and Cosmology, 2018 An exact determination of the Hubble constant remains one of key problems in cosmology for almost a century. However, its modern values derived by various methods still disagree from each other by almost 10%; the greater values being obtained by ...
Dumin, Yurii V.
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Measuring the Hubble Constant with the Hubble Space Telescope [PDF]
Proceedings of the International Astronomical Union, 1995 Ten years ago our team completed the Hubble Space Telescope Key Project on the extragalactic distance scale. Cepheids were detected in some 25 galaxies and used to calibrate four secondary distance indicators that reach out into the expansion field ...
J. R. Mould +6 more
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Cepheid Parallaxes and the Hubble Constant [PDF]
Monthly Notices of the Royal Astronomical Society, 2007 Revised Hipparcos parallaxes for classical Cepheids are analysed together with 10 HST-based parallaxes (Benedict et al.). In a reddening-free V,I relation we find that the coefficient of logP is the same within the uncertainties in our Galaxy as in the ...
Feast, Michael W. +3 more
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Median statistics and the Hubble constant [PDF]
Publications of the Astronomical Society of the Pacific, 2011 Following Gott et al. (2001), we use Huchra's final compilation of 553 measurements of the Hubble constant ($H_0$) to determine median statistical constraints on $H_0$.
Chen, Gang, Ratra, Bharat
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Carnegie Hubble Program: A Mid-Infrared Calibration of the Hubble Constant [PDF]
The Astrophysical Journal, 2012 Using a mid-infrared calibration of the Cepheid distance scale based on recent observations at 3.6 um with the Spitzer Space Telescope, we have obtained a new, high-accuracy calibration of the Hubble constant. We have established the mid-IR zero point of
Allende-Prieto +35 more
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