scholarly journals Modified gravity theories in light of the anomalous velocity dispersion of NGC1052-DF2

2019 ◽  
Vol 100 (10) ◽  
Author(s):  
Tousif Islam ◽  
Koushik Dutta
Keyword(s):  
Modified Gravity ◽  
Velocity Dispersion ◽  
Modified Gravity Theories ◽  
Gravity Theories ◽  
Anomalous Velocity

Nonlinear structure formation in gravity theories beyond general relativity

2016 ◽  
Vol 31 (21) ◽  
pp. 1640007
Author(s):  
David F. Mota
Keyword(s):  
Structure Formation ◽  
Modified Gravity ◽  
Equivalence Principle ◽  
Velocity Dispersion ◽  
Power Spectra ◽  
Nonlinear Structure ◽  
Modified Gravity Theories ◽  
Gravity Theories ◽  
Halo Masses ◽  
Screening Scale

We investigate the effects of modified gravity theories, in particular, the symmetron and f(R) gravity, on the nonlinear regime of structure formation. In particular, we investigate the velocity dispersion of galaxy clusters as a function of the halo masses, how the matter power spectra depend on the coupling, range and screening scale of the fifth force, and on possible ways of detecting violations of the equivalence principle using the mass inferred via lensing methods versus the mass inferred via dynamical methods.

Probing screened modified gravity with nonlinear structure formation

2018 ◽  
Vol 27 (04) ◽  
pp. 1830003 ◽  
Author(s):  
David F. Mota
Keyword(s):  
Structure Formation ◽  
Modified Gravity ◽  
Equivalence Principle ◽  
Velocity Dispersion ◽  
Power Spectra ◽  
Nonlinear Structure ◽  
Fifth Force ◽  
Modified Gravity Theories ◽  
Halo Masses ◽  
Screening Scale

We review the effects of modified gravity theories, in particular the symmetron and [Formula: see text] gravity, on the nonlinear regime of structure formation. In particular, we investigate the velocity dispersion of galaxy clusters as a function of the halo masses, how the matter power spectra depend on the coupling, range, and screening scale of the fifth force, and on possible ways of detecting violations of the equivalence principle using the mass inferred via lensing methods versus the mass inferred via dynamical methods. Furthermore, we show how one could use different voids statistics as one of the most promising probes of modified gravity.

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