Cosmological questions

The Cosmological Argument, Sufficient Reason, and Why-Questions

Entropy - Some Cosmological Questions Answered by Model of Expansive Nondecelerative Universe

The paper summarizes the background of Expansive Nondecelerative Universe model and its potential to offer answers to some open cosmological questions related to entropy. Three problems are faced in more detail, namely that of Hawking's phenomenon of black holes evaporation, maximum entropy of the Universe during its evolution, and time evolution of specific entropy. 1. Background of Expansive ...

Globular cluster formation and evolution in the context of cosmological galaxy assembly: open questions

We discuss some of the key open questions regarding the formation and evolution of globular clusters (GCs) during galaxy formation and assembly within a cosmological framework. The current state of the art for both observations and simulations is described, and we briefly mention directions for future research. The oldest GCs have ages greater than or equal to 12.5 Gyr and formed around the tim...

Multidimensional cosmological models: cosmological and astrophysical implications

We investigate four-dimensional effective theories which are obtained by dimensional reduction of multidimensional cosmological models with factorizable geometry and consider the interaction between conformal excitations of the internal space (geometrical moduli excitations) and Abelian gauge fields. It is assumed that the internal space background can be stabilized by minima of an effective po...

Cosmological background solutions and cosmological backreactions

The cosmological backreaction proposal, which attempts to account for observations without a primary dark energy source in the stress-energy tensor, has been developed and discussed by means of different approaches. Here, we focus on the concept of cosmological background solutions in order to develop a framework to study the backreaction proposal.