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Relativistic Axions from Collapsing Bose Stars
D G Levkov1, A G Panin1,2, I I Tkachev1
1Institute for Nuclear Research of the Russian Academy of Sciences, 60th October Anniversary prospect 7a, Moscow 117312, Russia.
Physical Review Letters
|January 21, 2017
Summary
Light bosonic dark matter can form Bose stars that collapse universally. This collapse involves self-similar infall and particle ejection, halting when the star can no longer sustain the process.
Area of Science:
- Astrophysics
- Cosmology
- Condensed Matter Physics
Background:
- Axionlike particles are candidates for light bosonic dark matter.
- These particles may condense into compact Bose stars.
- Critical-mass Bose stars are susceptible to collapse due to attractive self-interactions.
Purpose of the Study:
- To investigate the collapse dynamics of critical-mass Bose stars formed by axionlike particles.
- To understand the universal mechanisms governing this collapse process.
Main Methods:
- Studied the collapse of Bose stars through theoretical analysis.
- Focused on nonlinear self-similar evolution (wave collapse) and particle interactions.
Main Results:
- Bose star collapse proceeds in a universal manner driven by self-similar evolution.
- Particles infall to the star's center, leading to collisions and an outgoing stream of relativistic particles.
- This particle ejection halts the collapse when the star remnant cannot sustain further infall.
Conclusions:
- Bose star collapse is a self-limiting process driven by internal dynamics.
- The study reveals unexpected universal features in the collapse of axionlike dark matter stars.
- Findings have potential astrophysical and cosmological implications.
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