Motion of a Spherical Domain Wall and the Large-Scale Structure Formation

Yamamoto Kazuhiro

Tomita Kenji

Progress of Theoretical Physics

The evolution of a wall-like structure in the universe is investigated by assuming a simplified model of a domain wall. The domain wall is approximated as a thin spherical shell with domain wall-like matter, which is assumed to interact with dust-like dark matter in an entirely inelastic manner, and its motion in an expanding universe is numerically studied in the general-relativistic treatment. We evaluate the lifetime of the wall, which is defined as the characteristic time for the wall to shrink due to its own tension. It is necessary that this time is not smaller than the cosmic age, in order that the walls avoid the collapse to the present time and play an important role in the structure formation of the universe. It is shown that, in spite of the above interaction, the strong restriction is imposed on the surface density of the domain walls and the allowed values are too small to have any influences on the background model.

Physics [ 420 ]

eng

日本物理学会 ; 京都大学基礎物理学研究所

Copyright (c) Progress of Theoretical Physics 1991

[ISSN] 0033-068X

[DOI] 10.1143/PTP.86.1003

[NCID] AA00791455

[DOI] http://dx.doi.org/10.1143/PTP.86.1003