# Axion miniclusters and Bose stars.

@article{Kolb1993AxionMA, title={Axion miniclusters and Bose stars.}, author={Kolb and Tkachev}, journal={Physical review letters}, year={1993}, volume={71 19}, pages={ 3051-3054 } }

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\ensuremath{\sim}1 GeV can lead to very dense axion clumps, with present density ${\mathrm{\ensuremath{\rho}}}_{\mathit{a}}$\ensuremath{\gtrsim}${10}^{\mathrm{\ensuremath{-}}8}$ g ${\mathrm{cm}}^{\mathrm{\ensuremath{-}}3}$. This is high enough for the…

## 213 Citations

### Astrophysical Effects of Scalar Dark Matter Miniclusters

- Physics
- 2007

We model the formation, evolution and astrophysical effects of dark compact Scalar Miniclusters (``ScaMs''). These objects arise when a scalar field, with an axion-like or Higgs-like potential,…

### ON THE EXISTENCE OF THE SUPERSTRING AXION MINI-STAR

- Physics
- 2002

It is shown that the lasing mechanism of axion solitonic stars found by Tkachev is suppressed above a critical value of the QCD decay constant fa ≈ 1015GeV. This means, in particular, that the…

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- Physics
- 2020

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### The Lifetime of Axion Stars

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We investigate the decay of condensates of scalars in a field theory defined by $V({\cal A})=m{}^2\,f{}^2\,[1-\cos({\cal A}\,/\,f)]$, where $m$ and $f$ are the mass and decay constant of the scalar…

### Do dark matter axions form a condensate with long-range correlation?

- Physics, Medicine
- 2015

The authors investigate the formation of Bose-Einstein condensates from axion dark matter, and it is shown that a homogeneous condensate with long range correlations is unstable when interactions like gravity are taken into account.

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- 2004

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### Moduli stars

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- 2018

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### Dense Axion Stars.

- PhysicsPhysical review letters
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A new branch of dense axion stars is found in which gravity is balanced by the mean-field pressure of the axion Bose-Einstein condensate, and this branch could produce a bosenova, leaving a dense axions star as the remnant.

### Gravitational waves from binary axionic black holes

- PhysicsThe European Physical Journal C
- 2019

In a recent paper we have shown that a minimally coupled, self-interacting scalar field of mass m can form black holes of mass $$M=\sqrt{3}/(4m)$$M=3/(4m) (in Planck units). If dark matter is…

### Early seeds of axion miniclusters

- PhysicsJournal of Cosmology and Astroparticle Physics
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