TILTING OF THE PRIMORDIAL POWER SPECTRUM WITH BULK VISCOSITY

被引:8
作者
LIDSEY, JE
机构
[1] NASA/Fermilab Astrophysics Center, Fermi National Accelerator Laboratory, Batavia, 60510, IL
基金
美国国家航空航天局;
关键词
GALAXIES; CLUSTERING; COSMOLOGY; THEORY; DARK MATTER; EARLY UNIVERSE; LARGE-SCALE STRUCTURE OF UNIVERSE;
D O I
10.1093/mnras/266.2.489
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Within the context of the cold dark matter model, current observations suggest that inflationary models that 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 that lead to such a potential are discussed.
引用
收藏
页码:489 / 496
页数:8
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