Structure formation and microlensing with axion miniclusters
نویسندگان
چکیده
منابع مشابه
Axion miniclusters and Bose stars.
Evolution of inhomogeneities in the axion field around the QCD epoch is studied numerically, including for the first time important nonlinear effects. It is found that perturbations on scales corresponding to causally disconnected regions at T ∼ 1GeV can lead to very dense axion clumps, with present density ρa > ∼ 10 g cm. This is high enough for the collisional 2a → 2a process to lead to Bose–...
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Non-linear effects in the evolution of the axion field in the early Universe may lead to the formation of gravitationally bound clumps of axions, known as “miniclusters.” Minicluster masses and radii should be in the range Mmc ∼ 10M⊙ and Rmc ∼ 10cm, and in plausible early-Universe scenarios a significant fraction of the mass density of the Universe may be in the form of axion miniclusters. If s...
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The axion solution of the strong CP problem is reviewed together with the other strong CP solutions. We also point out the quintessential axion(quintaxion) whose potential can be extremely flat due to the tiny ratio of the hidden sector quark mass and the intermediate hidden sector scale. The quintaxion candidates are supposed to be the string theory axions, the model independent or the model d...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 2018
ISSN: 2470-0010,2470-0029
DOI: 10.1103/physrevd.97.083502