منابع مشابه
Cosmographic Thermodynamics of Dark Energy
Dark energy’s thermodynamics is here revised giving particular attention to the role played by specific heats and entropy in a flat Friedmann-Robertson-Walker universe. Under the hypothesis of adiabatic heat exchanges, we rewrite the specific heats through cosmographic, model-independent quantities and we trace their evolutions in terms of z. We demonstrate that dark energy may be modeled as pe...
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Motivated by recent results on non-vanishing spatial curvature [1] we employ the holographic model of dark energy to investigate the validity of first and second laws of thermodynamics in non-flat (closed) universe enclosed by apparent horizon RA and the event horizon measured from the sphere of horizon named L. We show that for the apparent horizon the first law is roughly respected for differ...
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In the present paper we consider the interacting holographic model of dark energy to investigate the validity of the generalized second laws of thermodynamics in non-flat (closed) universe enclosed by the event horizon measured from the sphere of the horizon named L. We show that for L as the system’s IR cut-off the generalized second law is respected for the special range of the deceleration p...
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متن کاملDark Matter and Dark Energy
I briefly review our current understanding of dark matter and dark energy. The first part of this paper focusses on issues pertaining to dark matter including observational evidence for its existence, current constraints and the ‘abundance of substructure’ and ‘cuspy core’ issues which arise in CDM. I also briefly describe MOND. The second part of this review focusses on dark energy. In this pa...
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ژورنال
عنوان ژورنال: Fortschritte der Physik
سال: 2008
ISSN: 0015-8208,1521-3978
DOI: 10.1002/prop.200710507