Collapse of Axionic Domain Wall and Axion Emission

Details Collapse of Axionic Domain Wall and Axion Emission Collapse of Axionic Domain Wall and Axion Emission

1994-02-25

arxiv.org/abs/astro-ph/9402066v2

Phys.Rev. D50 (1994) 4821-4826

Astronomy and Astrophysics

Astrophysics

uuencoded compressed 6 pages (REVTeX) + 6 figures (Postscript), UTAP-175 ICRR-Report-314-94-9

Scientific paper

10.1103/PhysRevD.50.4821

We examine the collapse of an axion domain wall bounded by an axionic string. It is found that the collapse proceeds quickly and axion domain walls disappear. However axions are emitted in the collapse and its energy density increases during radiation dominated era and contributes significantly to the present mass density of the universe. In particular the axion emitted from the wall can account for the dark matter in the universe for $F_a\gsim 10^{10}\GeV$.

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