High-Energy Astrophysics American and Soviet Perspectives/Proceedings from the U.S.-U.S.S.R. Workshop on High-Energy Astrophysics (1991) / Chapter Skim
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THE FORMATION AND EVOLUTION OF DOMAIN WALLS
THE FORMATION AND EVOLUTION OF DOMAIN WALLS
Pages 322-328
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From page 322... ...
in which a pseudo-Golds/one boson associated with the neutrino family of fermions undergoes a spontaneous symmetry breaking and acquires a mass on the order of mV2/MGUT- Hill et at speculate that the light, thick domain walls produced by these latetime phase transitions could account for much of the observed large-scale structure. Earlier, Wasserman (1986)
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also proposed a family of models in which a technicolor axion acquires a mass at low temperature phase transition. These models also produce domain walls; however, they remain severely constrained by stellar evolution bounds on axion properties.
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The dashed line is the best fitting relation of the folm RAIN = a + bin (~7/Wo) , fit in the interval JO < ~ < 100, marked By the dotted lined loops (Albrecht and lbrok 1985; Bennett and Bouchet 1988; see Press and Spergel 1989, for additional references)
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. Snapshots are taken at conformal times (a)
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The wall-buluced perwrba~ns with the highest amplitude are Pose near He size of the honzon. The density perturbations on the horizon scale create a quadrupole anisotropy in the microwave background through the Sachs-Wolfe effect, with amplitude [TIC ~ [pip ~ await Thus, if walls move freezer in the manner computed in this paper, and if they survive to the present, then it is impossible for them both to generate large scale structure, and to be consistent with quadrupole microwave background anisotropy limits.
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ACKNOWLEDGMENTS We thank Larry Widrow, Terry Walter, Id Lauer, David Nelson, Glenn Starkman, Curt Call=, Dave Schram~n, Marcelo Gleiser, and Doug Eardley for helpful discussions. This work was supported in part by the
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, and at the Institute for Theoretical Physics, Santa Barbara (PHY-82-17853) , with supplementary support from me National Aeronautics and Space Administration.
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