Results 111 to 120 of about 114,518 (203)

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

Status Report on the Chicago-Carnegie Hubble Program (CCHP): Measurement of the Hubble Constant Using the Hubble and James Webb Space Telescopes

The Astrophysical Journal
We present the latest results from the Chicago-Carnegie Hubble Program to measure the Hubble constant, using data from the James Webb Space Telescope (JWST). The overall program aims to calibrate three independent methods: (1) tip of the red giant branch
Wendy L. Freedman, Barry F. Madore, Taylor J. Hoyt, In Sung Jang, Abigail J. Lee, Kayla A. Owens   +5 more
doaj   +1 more source

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

A fine quantum mechanism of classical gravity

, 2003
It is shown that screening the background of super-strong interacting gravitons ensures the Newtonian attraction, if a part of single gravitons is pairing and graviton pairs are destructed by collisions with a body. If the considered quantum mechanism of
Ivanov, Michael A.
core  

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

Unveiling the Hubble constant through galaxy cluster gas mass fractions

Physics Letters B
In this work, we obtain Hubble constant (H0) estimates by using two galaxy cluster gas mass fraction measurement samples, Type Ia supernovae luminosity distances, and the validity of the cosmic distance duality relation.
Javier E. Gonzalez, Marcelo Ferreira, Leonardo R. Colaço, Rodrigo F.L. Holanda, Rafael C. Nunes   +4 more
doaj   +1 more source