Instability of scalar perturbation in a phantomic cosmological scenario

Scalar perturbations can grow during a phantomic cosmological phase as the big rip is approached, in spite of the high accelerated expansion regime, if the equation of state is such that \(\frac{p}{\rho} = \alpha < - {5/3}\). It is shown that such result is independent of the spatial curvature. T...

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Veröffentlicht in:	arXiv.org 2007-12
Hauptverfasser:	Fabris, J C, Jardim, D F, Goncalves, S V B
Format:	Artikel
Sprache:	eng
Schlagworte:	Curvature Equations of state Gravitational instability Parameters Perturbation Physics - Astrophysics of Galaxies Physics - Cosmology and Nongalactic Astrophysics Physics - Earth and Planetary Astrophysics Physics - General Relativity and Quantum Cosmology Physics - High Energy Astrophysical Phenomena Physics - High Energy Physics - Theory Physics - Instrumentation and Methods for Astrophysics Physics - Solar and Stellar Astrophysics Universe
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