Results 11 to 20 of about 1,546,467 (200)
Publications of the Astronomical Society of Australia, 2000 With the completion of the Hubble Space Telescope (HST) Key Project on the Extragalactic Distance Scale, it is interesting to form the dimensionless quantity H0t0 by multiplying the Hubble Constant by the age of the Universe.
Jeremy Mould
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DETERMINING THE HUBBLE CONSTANT FROM HUBBLE PARAMETER MEASUREMENTS [PDF]
The Astrophysical Journal, 2017 Citation: Chen, Y., Kumar, S., & Ratra, B. (2017). DETERMINING THE HUBBLE CONSTANT FROM HUBBLE PARAMETER MEASUREMENTS. Astrophysical Journal, 835(1), 4.
Chen, Y., Kumar, S., Ratra, Bharat
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A crack in the track of the Hubble constant [PDF]
, 2022 Measuring the rate at which the universe expands at a given time--the "Hubble constant"-- has been a topic of controversy since the first measure of its expansion by Edwin Hubble in the 1920's.
Gueguen, Marie
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The Hubble Constant from Blue Type Ia Supernovae
The Astrophysical JournalThere is a persistent tension of about 5 σ –6 σ between the value of the Hubble constant, as derived from the local distance ladder versus the cosmic microwave background, signaling either unaccounted for systematics in the measurements or “new physics,”
Christa Gall +3 more
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Evidence for dynamical dark energy with an evolving Hubble constant
Astronomy & AstrophysicsContext. Hubble constant tension, together with the recent indications of dynamical dark energy proposed from the Dark Energy Spectroscopic Instrument (DESI) baryon acoustic oscillation (BAO) measurements, poses significant challenges for the standard ...
Wang Yi-Ying, Li Yin-Jie, Fan Yi-Zhong
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Cosmological-model-independent Determination of Hubble Constant from Fast Radio Bursts and Hubble Parameter Measurements [PDF]
The Astrophysical Journal Letters, 2023 We establish a cosmological-model-independent method to determine the Hubble constant H _0 from the localized fast radio bursts (FRBs) and the Hubble parameter measurements from cosmic chronometers and obtain a first such determination H _0 = 71 ± 3 km s
Yang Liu, Hongwei Yu, Puxun Wu
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Estimating Hubble Constant with Gravitational Observations: A Concise Review
GalaxiesThe Hubble constant is of paramount importance in astrophysics and cosmology. A large number of methods have been developed with different electromagnetic probes to estimate its value.
Rosa Poggiani
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Tension in the Hubble constant
, 2017 There has been some hand-wringing of late about the tension between the value of the expansion rate of the universe – the famous Hubble constant, H <sub> 0 </sub> , measured directly from observed redshifts and distances, and that obtained by
Stacy McGaugh
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A nuclear data approach for the Hubble constant measurements [PDF]
EPJ Web of Conferences, 2017 An extraordinary number of Hubble constant measurements challenges physicists with selection of the best numerical value. The standard U.S. Nuclear Data Program (USNDP) codes and procedures have been applied to resolve this issue.
Pritychenko Boris
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Determination of the Hubble constant. [PDF]
Proc Natl Acad Sci U S A, 1999 Establishing accurate extragalactic distances has provided an immense challenge to astronomers since the 1920s. The situation has improved dramatically as better detectors have become available, and as several new, promising techniques have been developed.
Freedman WL, Feng LL.
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