LATE-TIME COSMOLOGICAL PHASE-TRANSITIONS - PARTICLE-PHYSICS MODELS AND COSMIC EVOLUTION

被引：125

作者：

FRIEMAN, JA ^{[1
]}

HILL, CT ^{[1
]}

WATKINS, R ^{[1
]}

机构：

[1] UNIV CHICAGO,ENRICO FERMI INST,DEPT ASTRON & ASTROPHYS,CHICAGO,IL 60637

来源：

PHYSICAL REVIEW D | 1992年 / 46卷 / 04期

关键词：

D O I：

10.1103/PhysRevD.46.1226

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We describe a natural particle-physics basis for late-time phase transitions in the Universe. Such a transition can seed the formation of large-scale structure while leaving a minimal imprint upon the microwave background anisotropy. The key ingredient is an ultralight pseudo Nambu-Goldstone boson with an astronomically large (approximately kpc-Mpc) Compton wavelength. We analyze the cosmological signatures of and constraints upon a wide class of scenarios which do not involve domain walls. In addition to seeding structure, coherent ultralight bosons may also provide unclustered dark matter in a spatially flat universe, OMEGA(phi) congruent-to 1.

引用

页码：1226 / 1238

页数：13

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