Modified Gravity
On the stability conditions for theories of modified gravity in the presence of matter fields
... of modified gravity theories in the presence of matter ...and Modified Gravity to retain a general approach for the gravity sector and a Sorkin-Schutz action for the matter ...testing ...
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A non Newtonian perspective of gravity : testing modified gravity theories in galaxies and galaxy clusters
... non-Newtonian gravity in the context of galaxies and galaxy ...of Modified Newtonian Dynamics (MOND) with Galileon gravity, Emergent Gravity (EG) and Modified Gravity (MOG) ...
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COSMOLOGICAL IMPLICATIONS OF MODIFIED GRAVITY: SPHERICAL COLLAPSE AND HIGHER ORDER CORRELATIONS
... In chapter 3 we studied the development of a spherical collapse simulation for our f (R) modified gravity model. Spherical collapse has been an important tool in the study of the formation of the large ...
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Kinetic Sunyaev-Zel'dovich effect in modified gravity
... The journey of the photons from the last scattering surface to us is not a smooth one. On their way to the observer, they undergo several physical processes which induce additional anisotropies on top of the primordial ...
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Interpreting the results of a modified gravity model: examining access to primary health care physicians in five Canadian provinces and territories
... the modified gravity model is superior to the kernel density model as it incor- porates road network travel time, versus crow-fly dis- tances, and uses real census block population counts, which avoids the ...
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Dark Energy, Modified Gravity and The Accelerating Universe
... Dvali, Gabadadze & Porrati 2000; Deffayet 2001.. Dark Energy or Modified Gravity?. • A given DE and modified gravity models may both fit the expansion history data very well[r] ...
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Initial conditions in chaotic inflation with modified gravity
... of modified gravity, R2- and Higgs-inflations, with emphasize on the specific change of the initial conditions with metric frame, while all the quanta still contribute equal ...
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Linear and non-linear Modified Gravity forecasts with future surveys
... Figure 2. Left: matter power spectra computed with MGCAMB (linear) and MGCAMB+Halofit (non-linear), illustrating the impact of non-linearities at different scales. As an illustrative example, MG in this plot corresponds ...
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VACUUM MODIFIED GRAVITY AS AN EXPLANATION FOR FLAT GALAXY ROTATION CURVES
... A modified, relativistic theory of gravitation has been proposed in which the vacuum energy density plays a key ...Vacuum Modified Gravity) naturally explains the observed flat galaxy rotation curves ...
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De Sitter limit analysis for dark energy and modified gravity models
... and modified gravity is supposed to well describe, at low energies, the behavior of the gravity modifications due to one extra scalar degree of ...general modified gravity theory ...
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Weak Lensing and Modified Gravity of Cosmic Structure
... of gravity, the expansion velocity of each shell responds more sensitively to any change of gravity at a given ...for modified gravity is to find voids in overdense environments, especially ...
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Constraining gravity with hadron physics: neutron stars, modified gravity and gravitational waves
... phases are very popular [46] as are mixed-flavor phases with strangeness (hyperons) that must appear for high enough Fermi levels (as the strange quark allows to relax the Fermi surface since it is one more fermion ...
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Theoretical and Observational Viability of Modified Gravity
... body. This formalism presents a proof of concept for use in general theories of modified gravity exhibiting a screening mechanism. However, in the case studied we find the form of the galileon propagators ...
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Beyond the growth rate of cosmic structure: testing modified gravity models with an extra degree of freedom
... The formalism developed in §§II–III applies only to lin- ear order in the fluctuations. When comparing its pre- dictions to data we must be careful to exclude any modes for which nonlinear effects may have been ...
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ENVIRONMENTAL EFFECTS IN MODIFIED GRAVITY MODELS
... they are not affected by the modification, so their abundance is the same as in the standard case. This is not affected by the initial conditions that we choose so that both when α is non-zero, and when the power ...
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The Hubble Tension: Change in Dark Energy or a Case for Modified Gravity? C Sivaram
... of modified gravity – used in recent work [7-9] as a way to account for flat rotation curves of galaxies without invoking DM – could in principle account also for the increase in ...of gravity over a ...
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Planck 2015 results XIV Dark energy and modified gravity
... We study the implications of Planck data for models of dark energy (DE) and modified gravity (MG) beyond the standard cosmological constant scenario. We start with cases where the DE only directly affects ...
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The Impact of the Internationalisation of Multinational Banks on Non financial Foreign Direct Investment in West Africa: A Modified Gravity Equation Approach
... A number of empirical studies, which analyze bilateral FDI flows through the framework of gravity model, have appeared also. (Frenkel, Funke, Stadtmann 2004 [7]) examined the determinants of FDI flows to emerging ...
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One model of modified gravity with dynamical torsion and its cosmological consequences
... There are many approaches to modify gravity in IR, see a comprehensive review [1]. These in- clude theories with extra dimensions [2–6] (for a review see Ref. [7]), f ( R ) and scalar-tensor gravities (for reviews ...
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Modified Gravity and the Radiation Dominated Epoch
... the primordial power spectrum at very small scales and constrain the inflationary epoch [13, 14]. We point out that in general modifications of gravity change the spectral distortions because of the different ...
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