scholarly journals Disentangling non-Gaussianity, bias, and general relativistic effects in the galaxy distribution

2012 ◽  
Vol 85 (4) ◽  
Author(s):  
Marco Bruni ◽  
Robert Crittenden ◽  
Kazuya Koyama ◽  
Roy Maartens ◽  
Cyril Pitrou ◽  
...  
Keyword(s):  
Relativistic Effects ◽  
Galaxy Distribution ◽  
The Galaxy ◽  
General Relativistic

scholarly journals General relativistic effects in the galaxy bias at second order

2019 ◽  
Vol 2019 (05) ◽  
pp. 020-020 ◽  
Author(s):  
Obinna Umeh ◽  
Kazuya Koyama ◽  
Roy Maartens ◽  
Fabian Schmidt ◽  
Chris Clarkson
Keyword(s):  
Relativistic Effects ◽  
Second Order ◽  
The Galaxy ◽  
General Relativistic ◽  
Galaxy Bias

scholarly journals Lensing Effects in Retarded Gravity

Symmetry ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 1062
Author(s):  
Asher Yahalom
Keyword(s):  
Dark Matter ◽  
Galaxy Clusters ◽  
Gravitational Lensing ◽  
Relativistic Effects ◽  
Newtonian Theory ◽  
Typical Size ◽  
Physical Systems ◽  
The Galaxy ◽  
General Relativistic ◽  
Retardation Effects

Galaxies are gigantic physical systems having a typical size of many tens of thousands of light years. Thus, any change at the center of the galaxy will affect the rim only tens of millennia later. Those retardation effects seem to be ignored in present day modelling used to calculate rotational velocities of matter in the outskirts of the galaxy and the surrounding gas. The significant discrepancies between the velocities predicted by Newtonian theory and observed velocities are usually handled by either assuming an unobservable type of matter denoted “dark matter” or by modifying the laws of gravity (MOND as an example). Here, we will show that considering general relativistic effects without neglecting retardation can explain the apparent excess matter leading to gravitational lensing in both galaxies and galaxy clusters.

scholarly journals Generalization of the Kaiser Rocket effect in general relativity in the wide-angle galaxy 2-point correlation function

2020 ◽  
Vol 29 (12) ◽  
pp. 2050085
Author(s):  
Daniele Bertacca
Keyword(s):  
General Relativity ◽  
Correlation Function ◽  
Power Spectrum ◽  
Relativistic Effects ◽  
Wide Angle ◽  
The Galaxy ◽  
Point Correlation ◽  
Point Correlation Function ◽  
General Relativistic ◽  
Rocket Effect

We study wide-angle correlations in the galaxy power spectrum in redshift space, including all general relativistic effects and the Kaiser Rocket effect in general relativity. We find that the Kaiser Rocket effect becomes important on large scales and at high redshifts, and leads to new contributions in wide-angle correlations. We believe this effect might be very important for future large volume surveys.

Beyond the Schwarzschild Metric

2018 ◽  
Author(s):  
David M. Wittman
Keyword(s):  
Black Holes ◽  
General Relativity ◽  
Gravitational Waves ◽  
Test Particle ◽  
Direct Detection ◽  
Relativistic Effects ◽  
Big Bang ◽  
Clusters Of Galaxies ◽  
General Relativistic ◽  
The Universe

General relativity explains much more than the spacetime around static spherical masses.We briefly assess general relativity in the larger context of physical theories, then explore various general relativistic effects that have no Newtonian analog. First, source massmotion gives rise to gravitomagnetic effects on test particles.These effects also depend on the velocity of the test particle, which has substantial implications for orbits around black holes to be further explored in Chapter 20. Second, any changes in the sourcemass ripple outward as gravitational waves, and we tell the century‐long story from the prediction of gravitational waves to their first direct detection in 2015. Third, the deflection of light by galaxies and clusters of galaxies allows us to map the amount and distribution of mass in the universe in astonishing detail. Finally, general relativity enables modeling the universe as a whole, and we explore the resulting Big Bang cosmology.

scholarly journals Analysis of the Galaxy Distribution using Multiscale Methods

2002 ◽  
Author(s):  
Philippe Querre ◽  
Jean-Luc Starck ◽  
Vicent J. Martinez
Keyword(s):  
Multiscale Methods ◽  
Galaxy Distribution ◽  
The Galaxy
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