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Cosmological structure formation from soft topological defects
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Schramm, David N. Fry, J. N. Hill, Christopher T. |
| Copyright Year | 1988 |
| Description | 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. |
| File Size | 699115 |
| Page Count | 18 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19890002996 |
| Archival Resource Key | ark:/13960/t9j43nn9g |
| Language | English |
| Publisher Date | 1988-09-21 |
| Access Restriction | Open |
| Subject Keyword | Atomic And Molecular Physics String Theory Red Shift Astrophysics Phase Transformations Universe Topology Domain Wall Density Vacuum Dark Matter Anisotropy Cosmology Structures Inhomogeneity Background Radiation Microwaves Bosons Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
