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Extended gravity cosmography

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In this paper, the success and the shortcomings of the ΛCDM model, based on cosmography, are discussed and a review of the model's performance is presented. But the model is not considered as a sort of a model-independent approach to tackle the dark energy/modified gravity problem.
Abstract
Cosmography can be considered as a sort of a model-independent approach to tackle the dark energy/modified gravity problem. In this review, the success and the shortcomings of the ΛCDM model, based...

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Cosmology Intertwined: A Review of the Particle Physics, Astrophysics, and Cosmology Associated with the Cosmological Tensions and Anomalies

Elcio Abdalla, +202 more
TL;DR: In this paper , the authors focus on the 5.0σ tension between the Planck CMB estimate of the Hubble constant H0 and the SH0ES collaboration measurements and discuss the importance of trying to fit a full array of data with a single model.
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Snowmass2021 - Letter of interest cosmology intertwined II: The hubble constant tension

Eleonora Di Valentino, +94 more
TL;DR: In this article, the authors focus on the 4.4σ tension between the Planck estimate of the Hubble constant H0 and the SH0ES collaboration measurements and discuss how the next decade's experiments will be crucial.
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Energy conditions in f(R) gravity

TL;DR: The null and strong energy conditions in this framework are derived from Raychaudhuri's equation along with the requirement that gravity is attractive, whereas the weak and dominant energy conditions are stated from a comparison with the energy conditions that can be obtained in a direct approach via an effective energy-momentum tensor for f(R) gravity.
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Kinematic reconstructions of extended theories of gravity at small and intermediate redshifts

TL;DR: In this paper, the authors focus on two classes of extended theories, i.e., the f(R, G) and f(r, G)-gravity, by calibrating the shapes of their curves through some of the most suitable dark energy parameterizations, XCDM, CPL, WP.
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A Simple Phenomenological Emergent Dark Energy Model can Resolve the Hubble Tension

TL;DR: In this article, the authors proposed a phenomenological emergent dark energy model where dark energy has no effective presence in the past and emerges at the later times, and showed that the model can satisfy different combinations of cosmological observations at low and high redshifts.
References
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Observation of Gravitational Waves from a Binary Black Hole Merger

B. P. Abbott, +1011 more
TL;DR: This is the first direct detection of gravitational waves and the first observation of a binary black hole merger, and these observations demonstrate the existence of binary stellar-mass black hole systems.
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Inflationary universe: A possible solution to the horizon and flatness problems

TL;DR: In this paper, the authors proposed a model of hot big-bang cosmology where the early universe is assumed to be highly homogeneous, in spite of the fact that separated regions were causally disconnected (horizon problem).
BookDOI

An introduction to statistical learning

TL;DR: An introduction to statistical learning provides an accessible overview of the essential toolset for making sense of the vast and complex data sets that have emerged in science, industry, and other sectors in the past twenty years.
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