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Record 5 of 2451
Dynamical evolution of domain walls in an expanding universe
External Online Source: doi:10.1086/168151
Author and Affiliation:
Press, William H.(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA, United States)
Ryden, Barbara S.(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA, United States)
Spergel, David N.(Princeton University, Observatory, NJ, United States)
Abstract: Whenever the potential of a scalar field has two or more separated, degenerate minima, domain walls form as the universe cools. The evolution of the resulting network of domain walls is calculated for the case of two potential minima in two and three dimensions, including wall annihilation, crossing, and reconnection effects. The nature of the evolution is found to be largely independent of the rate at which the universe expands. Wall annihilation and reconnection occur almost as fast as causality allows, so that the horizon volume is 'swept clean' and contains, at any time, only about one, fairly smooth, wall. Quantitative statistics are given. The total area of wall per volume decreases as the first power of time. The relative slowness of the decrease and the smoothness of the wall on the horizon scale make it impossible for walls to both generate large-scale structure and be consistent with quadrupole microwave background anisotropy limits.
Publication Date: Dec 15, 1989
Document ID:
19900032431
(Acquired Nov 28, 1995)
Accession Number: 90A19486
Subject Category: ASTROPHYSICS
Document Type: Journal Article
Publication Information: Astrophysical Journal, Part 1 (ISSN 0004-637X); 347; 590-604
Publisher Information: United States
Contract/Grant/Task Num: NSF PHY-86-04396; NSF PHY-82-17853
Financial Sponsor: NASA; United States
Organization Source: Harvard-Smithsonian Center for Astrophysics; Cambridge, MA, United States
Princeton Univ. Observatory; NJ, United States
Description: 15p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: BROKEN SYMMETRY; COMPUTATIONAL ASTROPHYSICS; GRAND UNIFIED THEORY; RELIC RADIATION; UNIVERSE; ASTRONOMICAL MODELS; COMPUTERIZED SIMULATION; DOMAIN WALL; GALACTIC EVOLUTION; NUMERICAL INTEGRATION; RANDOM WALK; STRING THEORY
Imprint And Other Notes: Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 347, Dec. 15, 1989, p. 590-604. Research supported by NASA and Alfred P. Sloan Foundation.
Miscellaneous Notes: Research supported by NASA and Alfred P. Sloan Foundation
Availability Source: Other Sources
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