A Comprehensive Measurement of the Local Value of the Hubble Constant with 1 km s−1 Mpc−1 Uncertainty from the Hubble Space Telescope and the SH0ES Team [PDF]
Astrophysical Journal Letters, 2021 We report observations from the Hubble Space Telescope (HST) of Cepheid variables in the host galaxies of 42 Type Ia supernovae (SNe Ia) used to calibrate the Hubble constant (H 0).
A. Riess +18 more
semanticscholar +1 more source
Measurements of the Hubble Constant: Tensions in Perspective [PDF]
Astrophysical Journal, 2021 Measurement of the distances to nearby galaxies has improved rapidly in recent decades. The ever-present challenge is to reduce systematic effects, especially as greater distances are probed and the uncertainties become larger.
W. Freedman
semanticscholar +1 more source
Incorporating Learnable Membrane Time Constant to Enhance Learning of Spiking Neural Networks [PDF]
IEEE International Conference on Computer Vision, 2020 Spiking Neural Networks (SNNs) have attracted enormous research interest due to temporal information processing capability, low power consumption, and high biological plausibility.
Wei Fang +5 more
semanticscholar +1 more source
Large Magellanic Cloud Cepheid Standards Provide a 1% Foundation for the Determination of the Hubble Constant and Stronger Evidence for Physics beyond ΛCDM [PDF]
Astrophysical Journal, 2019 We present an improved determination of the Hubble constant from Hubble Space Telescope (HST) observations of 70 long-period Cepheids in the Large Magellanic Cloud (LMC).
A. Riess +4 more
semanticscholar +1 more source
CODATA Recommended Values of the Fundamental Physical Constants: 2018
Journal of Physical and Chemical Reference Data, 2021 We report the 2018 self-consistent values of constants and conversion factors of physics and chemistry recommended by the Committee on Data of the International Science Council. The recommended values can also be found at physics.nist.gov/constants.
E. Tiesinga +3 more
semanticscholar +1 more source
A 2.4% DETERMINATION OF THE LOCAL VALUE OF THE HUBBLE CONSTANT [PDF]
, 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%.
A. Riess +14 more
semanticscholar +1 more source
Measurement of the fine-structure constant as a test of the Standard Model [PDF]
Science, 2018 Refining the fine-structure constant The fine-structure constant, α, is a dimensionless constant that characterizes the strength of the electromagnetic interaction between charged elementary particles.
Richard H. Parker +4 more
semanticscholar +1 more source
Anomalously low dielectric constant of confined water [PDF]
Science, 2018 Water's surface dielectric Theoretical studies predict that the inhibition of rotational motion of water near a solid surface will decrease its local dielectric constant. Fumagalli et al.
L. Fumagalli +12 more
semanticscholar +1 more source
Water distribution from medium-size sprinkler in solid set sprinkler systems
, 2016 Objetivou-se avaliar, neste trabalho, a distribuicao de agua de um aspersor de tamanho medio operando em sistemas fixos de irrigacao por aspersao. Perfis radiais de distribuicao de agua do aspersor, operando sob quatro condicoes de bocais (4,0 x 4,6; 5,0
G. Prado
semanticscholar +1 more source
The 6dF Galaxy Survey: baryon acoustic oscillations and the local Hubble constant [PDF]
, 2011 We analyse the large-scale correlation function of the 6dF Galaxy Survey (6dFGS) and detect a baryon acoustic oscillation (BAO) signal at 105h −1 Mpc. The 6dFGS BAO detection allows us to constrain the distance–redshift relation at zeff = 0.106.
F. Beutler +9 more
semanticscholar +1 more source