Cosmological structure formation from soft topological defects

Technical Report · Thu Sep 01 00:00:00 EDT 1988

OSTI ID:6513109

Hill, C T; Schramm, D N; Fry, J N

Some models have extremely low-mass pseudo-Goldstone bosons that can lead to vacuum phase transitions at late times, after the decoupling of the microwave background.. This can generate structure formation at redshifts z greater than or approx 10 on mass scales as large as M approx 10 to the 18th solar masses. Such low energy transitions can lead to large but phenomenologically acceptable density inhomogeneities in soft topological defects (e.g., domain walls) with minimal variations in the microwave anisotropy, as small as delta Y/T less than or approx 10 to the minus 6 power. This mechanism is independent of the existence of hot, cold, or baryonic dark matter. It is a novel alternative to both cosmic string and to inflationary quantum fluctuations as the origin of structure in the Universe.

• Research Organization: Fermi National Accelerator Lab., Batavia, IL (USA)
• OSTI ID: 6513109
• Report Number(s): N-89-12367; NASA-CR-183371; NAS-1.26:183371; FERMILAB-PUB-88/120-A
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COSMOLOGY
STRING MODELS
ANISOTROPY
ASTROPHYSICS
BACKGROUND RADIATION
BOSONS
DENSITY
PHASE TRANSFORMATIONS
RED SHIFT
THEORETICAL DATA
TOPOLOGY
UNIVERSE
COMPOSITE MODELS
DATA
EXTENDED PARTICLE MODEL
INFORMATION
MATHEMATICAL MODELS
MATHEMATICS
NUMERICAL DATA
PARTICLE MODELS
PHYSICAL PROPERTIES
QUARK MODEL
RADIATIONS
640106* - Astrophysics & Cosmology- Cosmology