scholarly journals Challenges to self-acceleration in modified gravity from gravitational waves and large-scale structure

2017 ◽  
Vol 765 ◽  
pp. 382-385 ◽  
Author(s):  
Lucas Lombriser ◽  
Nelson A. Lima
Keyword(s):  
Gravitational Waves ◽  
Modified Gravity ◽  
Large Scale ◽  
Large Scale Structure ◽  
Scale Structure

scholarly journals TOPOLOGY OF A LARGE-SCALE STRUCTURE AS A TEST OF MODIFIED GRAVITY

2012 ◽  
Vol 747 (1) ◽  
pp. 48 ◽  
Author(s):  
Xin Wang ◽  
Xuelei Chen ◽  
Changbom Park
Keyword(s):  
Modified Gravity ◽  
Large Scale ◽  
Large Scale Structure ◽  
Scale Structure

scholarly journals Large-scale structure and gravitational waves. III. Tidal effects

2014 ◽  
Vol 89 (8) ◽  
Author(s):  
Fabian Schmidt ◽  
Enrico Pajer ◽  
Matias Zaldarriaga
Keyword(s):  
Gravitational Waves ◽  
Large Scale ◽  
Large Scale Structure ◽  
Scale Structure ◽  
Tidal Effects

Cosmological probes of modified gravity: the nonlinear regime

2011 ◽  
Vol 369 (1957) ◽  
pp. 5068-5080 ◽  
Author(s):  
Fabian Schmidt
Keyword(s):  
Power Spectrum ◽  
Modified Gravity ◽  
Large Scale ◽  
Large Scale Structure ◽  
Scale Structure ◽  
Nonlinear Regime ◽  
Matter Power Spectrum ◽  
Massive Halos

We review the effects of modified gravity on large-scale structure in the nonlinear regime, focusing on f ( R ) gravity and the Dvali–Gabadadze–Porrati model, for which full N -body simulations have been performed. In particular, we discuss the abundance of massive halos, the nonlinear matter power spectrum and the dynamics within clusters and galaxies, with particular emphasis on the screening mechanisms present in these models.

scholarly journals Non-Gaussian stochastic gravitational waves from phase transitions

2021 ◽  
Vol 2021 (11) ◽  
Author(s):  
Soubhik Kumar ◽  
Raman Sundrum ◽  
Yuhsin Tsai
Keyword(s):  
Phase Transitions ◽  
Cosmic Microwave Background ◽  
Gravitational Wave ◽  
Gravitational Waves ◽  
Large Scale ◽  
Large Scale Structure ◽  
Scale Structure ◽  
Microwave Background ◽  
Gravitational Wave Detectors ◽  
Non Gaussian

Abstract Cosmological phase transitions in the primordial universe can produce anisotropic stochastic gravitational wave backgrounds (GWB), similar to the cosmic microwave background (CMB). For adiabatic perturbations, the fluctuations in GWB follow those in the CMB, but if primordial fluctuations carry an isocurvature component, this need no longer be true. It is shown that in non-minimal inflationary and reheating settings, primordial isocurvature can survive in GWB and exhibit significant non-Gaussianity (NG) in contrast to the CMB, while obeying current observational bounds. While probing such NG GWB is at best a marginal possibility at LISA, there is much greater scope at future proposed detectors such as DECIGO and BBO. It is even possible that the first observations of inflation-era NG could be made with gravitational wave detectors as opposed to the CMB or Large-Scale Structure surveys.

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