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Tilting the Primordial Power Spectrum with Bulk Viscosity | | James E. Lidsey
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16 Dec 1993 | | Journal: | Mon.Not.Roy.Astron.Soc. 266 (1994) 489 | | Subject: | astro-ph | | Abstract: | Within the context of the cold dark matter model, current observations suggest that inflationary models which generate a tilted primordial power spectrum with negligible gravitational waves provide the most promising mechanism for explaining large scale clustering. The general form of the inflationary potential which produces such a spectrum is a hyperbolic function and is interpreted physically as a bulk viscous stress contribution to the energy-momentum of a perfect baryotropic fluid. This is equivalent to expanding the equation of state as a truncated Taylor series. Particle physics models which lead to such a potential are discussed. | | Source: | arXiv, astro-ph/9312037 | | Services: | Forum | Review | PDF | Favorites | |
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