Tuesday, February 12, 2013

1302.2186 (Berta Margalef-Bentabol et al.)

Evolution of the Cosmological Horizons in a Concordance Universe with
Countably Infinitely Many State Equations

Berta Margalef-Bentabol, Juan Margalef-Bentabol, Jordi Cepa
This paper is the second of two papers devoted to the study of the evolution of the cosmological horizons (particle and event horizons). Specifically, in this paper we consider the extremely general case of an accelerated universe with countably infinitely many constant state equations, and we obtain simple expressions in terms of their respective recession velocities that generalize the previous results for one and two state equations. We also provide a qualitative study of the values of the horizons and their velocities at the origin of the universe and at the far future, and we prove that these values only depend on one dominant state equation. Finally, we compare both horizons and determine when one is larger that the other.
View original: http://arxiv.org/abs/1302.2186

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