Axions in astrophysics and cosmology

Details Axions in astrophysics and cosmology Axions in astrophysics and cosmology

Jul 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984isos.book.....s&link_type=abstract

Presented at Inner Space/Outer Space Conf., Batavia, Ill., 2 May 1984

Astronomy and Astrophysics

Astrophysics

Cosmology, Galactic Evolution, Quantum Chromodynamics, Astrophysics, Electromagnetic Fields, Sun

Scientific paper

Axion models often have a spontaneously broken exact discrete symmetry. In that case, they have discretely degenerate vacua and hence domain walls. The properties of the domain walls, the cosmological catastrophe they produce, and the ways in which this catastrophe may be avoided are explained. Cosmology and astrophysics provide arguments that imply the axion decay constant should lie in the range 10 to the 8th power GeV less than or equal to fa less than or equal to 10 to the 12th power GeV. Reasons are given why axions are an excellent candidate to constitute the dark matter of galactic halos. Using the coupling of the axions to the electromagnetic field, detectors are described to look for axions floating about in the halo of our galaxy and for axions emitted by the Sun.

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