The Influence of the Mass Distribution of Stellar Objects on Their Gravitational Fields

Abstract

We study the influence of the mass randomness of astronomical objects on the distribution function of their gravitational fields. Based on purely theoretical arguments and on a comparison with extensive data collected from observations and numerical simulations, we show that while mass randomness does not alter the non-Gaussian character of the gravitational field distribution, it does changes the dependencies of mean angular momenta of galaxies and clusters on their richness. The specific form of such dependencies is determined by the interplay of the character of the mass distributions and different assumptions about cluster morphology. We trace the influence of the mass distribution on the time evolution of the angular momenta of stellar objects in CDM and ΛCDM models. Our theoretical predictions are in very good agreement with the statistical results derived both from observational data and numerical simulations.

The Alignment of Galaxies in Structures – Review

“…Moreover, the work of Trujillo, Carretero and Patiri (2006) and Varela et al (2012) [25,31] shows relationships between the orientation of dark matter and the orientation of galaxies. The same effect is also indicated by the simulations of Illustris [63,[146][147][148] and EAGLE ([149]. This means that the study of luminous matter provides information about the orientation of dark matter also.…”

“…It should be also mentioned that it has been noted that the alignment of galaxy orientation can, and even should, evolve over time [148,239,267,268] .From an observational point of view, this means that the alignment of galaxies will also be a function of the z redshift. The work of Godłowski (2015, 2017) [239,241], directly shows that angular momentum of galaxies in cluster increases with time.…”