Results 111 to 120 of about 6,292 (199)

Constrain the Hubble Constant from Extreme Mass Ratio Inspirals Dark Sirens Using Galaxy Clusters

The Astrophysical Journal
Extreme mass ratio inspirals (EMRIs) are key observational targets for future space-based gravitational wave detectors and hold significant value in cosmological research.
Jian-Dong Liu, Wen-Biao Han, Qianyun Yun
doaj   +1 more source

A gravitational-wave standard siren measurement of the Hubble constant.

, 2018
On 17 August 2017, the Advanced LIGO and Virgo detectors observed the gravitational-wave event GW170817-a strong signal from the merger of a binary neutron-star system.

core   +1 more source

Estimating cosmological parameters and reconstructing Hubble constant with artificial neural networks: a test with covariance matrix and mock H(z)

European Physical Journal C: Particles and Fields
In this work, we reconstruct the H(z) based on observational Hubble data with Artificial Neural Network, then estimate the cosmological parameters and the Hubble constant.
Jie-feng Chen, Tong-Jie Zhang, Peng He, Tingting Zhang, Jie Zhang   +4 more
doaj   +1 more source

Fast radio bursts as cosmological proxies: estimating the hubble constant

Frontiers in Astronomy and Space Sciences
One of the most challenging problems in modern cosmology is the Hubble tension, a discrepancy in the predicted expansion rate of the Universe with different observational techniques that results in two conflicting values of H0.
Eduard Fernando Piratova-Moreno, Luz Ángela García, Carlos A. Benavides-Gallego, Ana Carolina Cabrera Blandón   +3 more
doaj   +1 more source

Hubble-constant and -mass determination of Centaurus A and M83 from tip-of-red-giant-branch distances

Astronomy & Astrophysics
An independent determination of the Hubble constant is crucial in light of the persistent tension between early- and late-Universe measurements. In this study, we analysed the dynamics of the Centaurus A (CenA) and M83 galaxies, along with their ...
Faucher Adrian, Benisty David, Mota David F.   +2 more
doaj   +1 more source

A mathematical theoryof the accelerated expansion of the Universe based on the principle of least action

Современная математика: Фундаментальные направления
In classical works, the equations for gravitational and electromagnetism fields are proposed without deriving the right-hand sides. Here, we derive the right-hand sides and analyze the energy-momentum tensor within the framework of the Vlasov-Maxwell ...
V. V. Vedenyapin, Ya. G. Batishcheva, M. V. Goryunova, A. A. Russkov   +3 more
doaj   +1 more source

Cosmic expansion in homogeneous and inhomogeneous universes : supernovae type Ia as cosmic probes

, 2010
Seikel M. Cosmic expansion in homogeneous and inhomogeneous universes : supernovae type Ia as cosmic probes. Bielefeld (Germany): Bielefeld University; 2010.Since it has been discovered in the late 1990s that the universe is likely to be expanding ...
Seikel, Marina
core  

A Common Origin of the H₀ and S₈ Cosmological Tensions and a Resolution Within a Modified ΛCDM Framework

Galaxies
The two most severe cosmological tensions in the Hubble constant H0 and the matter clustering amplitude S8 have the same relative discrepancy of 8.3%, which suggests that they may have a common origin. Modifications of gravity and exotic dark fields with
Dimitris M. Christodoulou, Demosthenes Kazanas, Silas G. T. Laycock   +2 more
doaj   +1 more source

Hubble constant redux

, 2017
There is a new article in Science on the expansion rate of the universe, very much along the lines of my recent post. It is a good read that I recommend. It includes some of the human elements that influence the science.
openaire   +1 more source

Determination of the Hubble Constant

, 1996
Recent developments in the determination of H0 are reviewed in the context of the 3 following questions: 1) What is required to measure an accurate value of H0? Given the wide range of H0 values quoted in the current literature, is there any evidence that the situation has changed very much at all in the last couple of decades? And 3), is a measurement
openaire   +2 more sources