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Self-Similar Growth of Bose Stars
A S Dmitriev1, D G Levkov1,2, A G Panin1
1Institute for Nuclear Research of the Russian Academy of Sciences, Moscow 117312, Russia.
Physical Review Letters
|March 15, 2024
Summary
We analytically solved Bose star growth, finding a self-similar solution for particle baths. This explains mass evolution and predicts dark matter model variations.
Area of Science:
- Astrophysics
- Cosmology
- Particle Physics
Background:
- Bose stars are hypothetical compact objects formed from Bose-Einstein condensates.
- Understanding their growth is crucial for dark matter theories.
- Gravitationally interacting particle baths pose complex theoretical challenges.
Purpose of the Study:
- To analytically solve the problem of Bose star growth.
- To determine the mass evolution of Bose stars within a particle bath.
- To explain observed phenomena and predict new outcomes in dark matter models.
Main Methods:
- Analytical solution of the kinetic equation for particle baths.
- Application of self-similar solutions.
- Incorporation of conservation laws to fix mass evolution.
Main Results:
- Identified a self-similar solution describing the particle bath after Bose star nucleation.
- Established a theoretical framework for Bose star mass evolution.
- Explained the slowdown of Bose star growth at a specific core-halo mass.
- Predicted the formation of both heavier and lighter objects in specific dark matter models.
Conclusions:
- The analytical approach provides a robust explanation for Bose star growth dynamics.
- The theory supports predictions for dark matter models, including magistral dark matter.
- The developed adiabatic approach to self-similarity has broader implications for kinetic theory.
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