Results 11 to 20 of about 2,969 (164)
The Universal Grammar of Evolution [PDF]
Философия и космология, 2022 The evolution (sensu lato) of the cosmos can be divided in three phases: cosmological evolution (sensu stricto), biological evolution and cultural evolution. Analogies between biological and cultural evolution date from the nineteenth century although it
Koen B. Tanghe, Sylvain Billiard
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Analysis of Reconstructed Modified Symmetric Teleparallel f(Q) Gravity
Frontiers in Astronomy and Space Sciences, 2022 The existing analysis reports a reconstruction scheme of the newly proposed gravity say f(Q) gravity through the scale factor of the form a(t)=a0tn=11+z by describing the power-law cosmology.
N. Myrzakulov +5 more
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Dynamics and cosmological evolution in Λ-varying cosmology [PDF]
The European Physical Journal C, 2019 We study the dynamical properties of a large body of varying vacuum cosmologies for which dark matter interacts with vacuum. In particular, performing the critical point analysis we investigate the existence and the stability of cosmological solutions which describe de-Sitter, radiation and matter dominated eras. We find several cases of varying vacuum
Papagiannopoulos, G. +3 more
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Evolution of cosmological horizons of wormhole cosmology [PDF]
International Journal of Modern Physics D, 2020 Recently, we solved Einstein’s field equations to obtain the exact solution of the cosmological model with the Morris–Thorne-type wormhole. We found the apparent horizons and analyzed their geometric natures, including the causal structures. We also derived the Hawking temperature near the apparent cosmological horizon.
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Quasars: Standard Candles up to z = 7.5 with the Precision of Supernovae Ia
The Astrophysical Journal, 2023 Currently, the Λ cold dark matter model, which relies on the existence of cold dark matter and a cosmological constant Λ, best describes the universe. However, we lack information in the high-redshift ( z ) region between Type Ia supernovae (SNe Ia; up ...
M. G. Dainotti +4 more
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The horizon of the McVittie black hole: on the role of the cosmic fluid modeling
European Physical Journal C: Particles and Fields, 2020 In this paper, we investigate the existence and time evolution of the cosmological and event horizons in a McVittie universe whose expansion is driven by the Redlich–Kwong, (Modified) Berthelot, Dieterici, and Peng–Robinson fluids, respectively.
Daniele Gregoris, Yen Chin Ong, Bin Wang
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Perturbative approach to f(R)-gravitation in FLRW cosmology
European Physical Journal C: Particles and Fields, 2023 The f(R) theory of gravitation developed perturbatively around the general theory of relativity with cosmological constant (the $$\varLambda $$ Λ CDM model) in a flat FLWR geometry is considered. As a result, a general explicit cosmological solution that
Pham Van Ky +2 more
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Constraints and Evolution in Cosmology [PDF]
, 2002 We review some old and new results about strict and non strict hyperbolic formulations of the Einstein equations.
Choquet-Bruhat, Yvonne, York, James W.
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Cosmological evolution of the nitrogen abundance [PDF]
Monthly Notices of the Royal Astronomical Society, 2018 accepted for publication in ...
Vangioni, Elisabeth +7 more
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Physics Letters B, 2022 We present a cosmological model arising from a gravitational theory with an infinite tower of higher-order curvature invariants that can reproduce the entire evolution of the Universe: from inflation to late-time acceleration, without invoking an ...
Luisa G. Jaime, Gustavo Arciniega
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