Results 141 to 150 of about 8,643,173 (282)

Explaining Holographic Dark Energy

open access: yesGalaxies, 2013
The possible holographic origin of dark energy is investigated. The main existing explanations, namely the UV/IR connection argument of Cohen et al., Thomas’ bulk holography argument, and Ng’s spacetime foam argument, are shown to be not wholly ...
Shan Gao
doaj   +1 more source

Testing the LSST Difference Image Analysis Pipeline Using Synthetic Source Injection Analysis

open access: yesThe Astrophysical Journal
We evaluate the performance of the Legacy Survey of Space and Time Science Pipelines Difference Image Analysis (DIA) on simulated images. By adding synthetic sources to galaxies on images, we trace the recovery of injected synthetic sources to evaluate ...
S. Liu   +5 more
doaj   +1 more source

Tsallis holographic dark energy

open access: yesPhysics Letters B, 2018
Employing the modified entropy–area relation suggested by Tsallis and Cirto [1], and the holographic hypothesis, a new holographic dark energy (HDE) model is proposed.
M. Tavayef   +3 more
doaj   +1 more source

Impact of Teleparallelism on Addressing Current Tensions and Exploring the GW Cosmology

open access: yesThe Astrophysical Journal
The H _0 and S _8 tensions highlight critical discrepancies in modern cosmology, challenging the standard Lambda cold dark matter model. The H _0 tension arises from conflicting measurements between local probes and early-Universe predictions. Similarly,
Sai Swagat Mishra   +3 more
doaj   +1 more source

Anisotropic 2-form dark energy

open access: yesPhysics Letters B, 2019
We study the dynamics of dark energy in the presence of a 2-form field coupled to a canonical scalar field ϕ. We consider the coupling proportional to e−μϕ/MplHαβγHαβγ and the scalar potential V(ϕ)∝e−λϕ/Mpl, where Hαβγ is the 2-form field strength, μ,λ ...
Juan P. Beltrán Almeida   +4 more
doaj   +1 more source

Gaussian Process Approach for Model-independent Reconstruction of f(Q) Gravity with Direct Hubble Measurements

open access: yesThe Astrophysical Journal
The increase of discrepancy in the standard procedure to choose the arbitrary functional form of the Lagrangian f ( Q ) motivates us to solve this issue in modified theories of gravity. In this regard, we investigate the Gaussian process, which allows us
Gaurav N. Gadbail   +2 more
doaj   +1 more source

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