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Multifield, Multifrequency Bosonic Stars and a Stabilization Mechanism.

Nicolas Sanchis-Gual1,2, Fabrizio Di Giovanni3, Carlos Herdeiro1

  • 1Departamento de Matemática da Universidade de Aveiro and Centre for Research and Development in Mathematics and Applications (CIDMA), Campus de Santiago, 3810-183 Aveiro, Portugal.

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Summary
This summary is machine-generated.

Scalar bosonic stars (BSs) are exotic compact objects. New research explores multi-field BSs with different frequencies, revealing new shapes and a stabilization mechanism for unstable BSs.

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Area of Science:

  • Theoretical astrophysics
  • General relativity
  • Exotic compact objects

Background:

  • Scalar bosonic stars (BSs) are versatile models for exotic compact objects.
  • Previous studies focused on single-field or equal-frequency multi-field BSs.

Purpose of the Study:

  • To explore new morphologies and stabilization mechanisms for bosonic stars.
  • To investigate the impact of multiple complex fields with different frequencies on BS properties.

Main Methods:

  • Analytical construction of multi-field bosonic star solutions.
  • Numerical simulations of the Einstein-Klein-Gordon system for formation and evolution.
  • Analysis of dynamical stability and energy distribution.

Main Results:

  • A continuous family of BSs with different frequencies and morphologies was generated.
  • Single-frequency solutions with various parities (e.g., spinning, toroidal, dipole) were identified.
  • Hybrid-ℓ constructions, incorporating a fundamental ℓ=0 BS, demonstrated dynamical stabilization for unstable solutions.

Conclusions:

  • Multi-field BSs offer novel configurations and stabilization pathways.
  • Dynamical robustness is linked to energy distribution, as shown by numerical simulations.
  • This work expands the landscape of bosonic star solutions and their stability properties.