期刊
ASTRONOMY & ASTROPHYSICS
卷 537, 期 -, 页码 -出版社
EDP SCIENCES S A
DOI: 10.1051/0004-6361/201117707
关键词
cosmological parameters; dark energy; cosmology: observations; cosmology: theory
资金
- CNPq
- CAPES
Significant observational effort has been directed to unveiling the nature of the so-called dark energy. However, given the large number of theoretical possibilities, it is possible that this a task cannot be based only on observational data. We discuss some thermodynamic properties of this energy component assuming a general time-dependent equation-of-state parameter w(z) = w(0) + w(a)f(z), where w(0) and w(a) are constants and f(z) may assume different forms. We show that very restrictive bounds can be placed on the w(0) - w(a) space when current observational data are combined with the thermodynamic constraints derived.
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