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Science, 1992
The Hubble constant is the constant of proportionality between recession velocity and distance in the expanding universe. It is a fundamental property of cosmology that sets both the scale and the expansion age of the universe. It is determined by measurement of galaxy radial velocities and distances.
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The Hubble constant is the constant of proportionality between recession velocity and distance in the expanding universe. It is a fundamental property of cosmology that sets both the scale and the expansion age of the universe. It is determined by measurement of galaxy radial velocities and distances.
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Physics Today, 2013
Perhaps the fundamental parameter of cosmology, the ratio of an object’s recessional speed to its distance from us encodes information about the universe’s age, composition, and structure.
Mario Livio, Adam G. Riess
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Perhaps the fundamental parameter of cosmology, the ratio of an object’s recessional speed to its distance from us encodes information about the universe’s age, composition, and structure.
Mario Livio, Adam G. Riess
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Global Value of Hubble Constant
Publications of the Astronomical Society of Australia, 1982An accurate determination of the global Hubble Constant needs distance to objects well outside the Local Supercluster with redshift greater than ~ 2000 km/s. This is mainly to reduce the effect of the peculiar motion of the Local Group on the measured redshifts as well as to get away from the gravitational influence of the nearby high density regions ...
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Physics Reports, 1998
Abstract Measuring the Hubble constant ( H 0 ), or the rate of expansion of the universe, has proved to be a much more difficult enterprise than originally anticipated. Recent, rapid progress in measuring accurate distances to galaxies, coupled with the prospects for measuring the Hubble constant using other physical techniques offers the promise ...
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Abstract Measuring the Hubble constant ( H 0 ), or the rate of expansion of the universe, has proved to be a much more difficult enterprise than originally anticipated. Recent, rapid progress in measuring accurate distances to galaxies, coupled with the prospects for measuring the Hubble constant using other physical techniques offers the promise ...
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A simple determination of Hubble’s constant
European Journal of Physics, 2016The aim of this paper is to make a determination of Hubble's constant from the experimental data on the magnitude and redshift of supernovae. We proposed a very simple approach that could also be very useful from a didactic point of view.
Benedetto E., Feoli A., Principe S.
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Hubble’s constant and rotational deceleration
Lettere Al Nuovo Cimento Series 2, 1973It is noted that the astronomical evaluation of the Hubble constant has tended to decrease, the latest value being about 1.6 x 10/sup -18//s. Fossil evidence on the Earth--Moon-- Sun system is presented which may provide a lower bound on that constant. (WDM)
D. H. Weinstein, J. Keeney
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Physics Today, 1986
Hubble's celebrated constant, which relates the recessional velocities of galaxies to their distances, is perhaps the most important number in extragalactic astronomy. Using it, along with their favorite models, astronomers and cosmologists derive the age of the universe, estimate its size, calculate the luminosity of quasars and much more ...
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Hubble's celebrated constant, which relates the recessional velocities of galaxies to their distances, is perhaps the most important number in extragalactic astronomy. Using it, along with their favorite models, astronomers and cosmologists derive the age of the universe, estimate its size, calculate the luminosity of quasars and much more ...
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Abstract Einstein believed that any valid solution of his gravitational field equations would demand a universe with matter, but Dutch theorist Willem de Sitter disagreed. He devised an ‘empty’ solution which, although artificial, was still capable of providing physical insight.
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Should Hubble's constant be doubled?
Nature, 1978LYNDEN-BELL1 has argued that Hubble's constant H0 should be doubled, from its present notional value of 55 km s−1 Mpc−1 to 110 km s−1 Mpc−1. He claims that with this value of H0 the apparent superluminal expansions in compact radio sources can be explained in a more consistent manner than previously, by means of his model of the expansion based on the ...
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The Hubble Constant: A Discourse
Publications of the Astronomical Society of the Pacific, 1996Multiple evidence is compiled and discussed that the large-scale value of the Hubble constant must lie within the range of 45 < H0 < 65.
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