Stability conditions for the Bianchi type II anisotropically inflating universes

Journal Article · Thu Jan 15 00:00:00 EST 2009 · Journal of Cosmology and Astroparticle Physics

DOI:https://doi.org/10.1088/1475-7516/2009/01/022· OSTI ID:22156861

Kao, W. F. ^[1]; Lin, Ing-Chen ^[2]

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1. Institute of Physics, Chiao Tung University, Hsin Chu, Taiwan (China)
2. Dept. of Physics, Tsin Hua University, Hsin Chu, Taiwan (China)

Stability conditions for a class of anisotropically inflating solutions in the Bianchi type II background space are shown explicitly in this paper. These inflating solutions were known to break the cosmic no-hair theorem such that they do not approach the de Sitter universe at large times. It can be shown that unstable modes of the anisotropic perturbations always exist for this class of expanding solutions. As a result, we show that these set of anisotropically expanding solutions are unstable against anisotropic perturbations in the Bianchi type II space.

• OSTI ID: 22156861
• Journal Information: Journal of Cosmology and Astroparticle Physics, Vol. 2009, Issue 01; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 1475-7516
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
ANISOTROPY
DE SITTER SPACE
DISTURBANCES
INFLATIONARY UNIVERSE
MATHEMATICAL SOLUTIONS
STABILITY
UNIVERSE