Results 81 to 90 of about 1,848 (175)

Refined Constraints on the Hubble Constant from Localized Fast Radio Bursts with Assessment of Systematic Effects

The Astrophysical Journal
The dispersion measure–redshift relation of fast radio bursts (FRBs) provides a valuable cosmological probe for constraining the Hubble constant, offering an independent measurement that could help resolve the ongoing Hubble tension.
Chenyuan Xu, Yi Feng, Jiaying Xu
doaj   +1 more source

The shrinking Hubble constant

, 2006
This replacement corrects the method of separating components of red ...
openaire   +2 more sources

Running Hubble constant: Evolutionary Dark Energy

Physics of the Dark Universe
8 pages, 3 ...
G. Montani, N. Carlevaro, M.G. Dainotti
openaire   +2 more sources

Domain Walls and Hubble constant Tension

Proceedings of Corfu Summer Institute 2023 "School and Workshops on Elementary Particle Physics and Gravity" — PoS(CORFU2023)
We present the idea that replacing the cosmological constant $Λ$ in the $Λ$CDM model by a distribution of walls, with very low tension compared to what one would expect from new physics, could help explaining the tension in the Hubble constant fits in the Standard Cosmological Model. Using parameters from our model for dark matter as macroscopic pearls,
Froggatt, Colin D., Nielsen, Holger Bech
openaire   +2 more sources

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

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

The TRGB−SBF Project. III. Refining the HST Surface Brightness Fluctuation Distance Scale Calibration with JWST

The Astrophysical Journal
The TRGB−SBF Project team is developing an independent distance ladder using a geometrical calibration of the tip of the red giant branch (TRGB) method in elliptical galaxies that can, in turn, be used to set the surface brightness fluctuation (SBF ...
Joseph B. Jensen, John P. Blakeslee, Michele Cantiello, Mikaela Cowles, Gagandeep S. Anand, R. Brent Tully, Ehsan Kourkchi, Gabriella Raimondo   +7 more
doaj   +1 more source