Entropy and creation cold dark matter models

Full text
Author(s):	Valentim, R. ; Jesus, J. F. Total Authors: 2
Document type:	Journal article
Source:	ASTRONOMISCHE NACHRICHTEN; v. 340, n. 1-3, p. 3-pg., 2019-01-01.
Abstract
Entropy is a fundamental concept from thermodynamics, and it can be used to study models in the context of the creation cold dark matter. A general feature of these models is that thermodynamic equilibrium is reached at last at the de Sitter era. Total Universe's entropy is calculated based on three terms: apparent horizon (S-h), entropy of matter (S-m), and entropy of radiation (S). The constraints from total entropy come from the first and second derivatives () to estimate the parameters of the model with the general matter creation rate. The preliminary outcomes suggest limits for these parameters. (AU)

FAPESP's process:	16/09831-0 - Neutron Stars populations: bayesian statistics tools
Grantee:	Rodolfo Valentim da Costa Lima
Support Opportunities:	Regular Research Grants


FAPESP's process:	17/05859-0 - The accelerating universe: nature and tests of dark energy and dark matter
Grantee:	José Fernando de Jesus
Support Opportunities:	Regular Research Grants