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arxiv 0710.4131 v5 pith:7SVWOZHO submitted 2007-10-22 gr-qc

Numerical Simulations of Oscillating Soliton Stars: Excited States in Spherical Symmetry and Ground State Evolutions in 3D

Jayashree Balakrishna , Ruxandra Bondarescu , Gregory Daues , Mihai Bondarescu This is my paper
classification gr-qc
keywords stateexcitedstarsgroundoscillatonsstudiedbosoncondition
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Excited state soliton stars are studied numerically for the first time. The stability of spherically symmetric S-branch excited state oscillatons under radial perturbations is investigated using a 1D code. We find that these stars are inherently unstable either migrating to the ground state or collapsing to black holes. Higher excited state configurations are observed to cascade through intermediate excited states during their migration to the ground state. This is similar to excited state boson stars. Ground state oscillatons are then studied in full 3D numerical relativity. Finding the appropriate gauge condition for the dynamic oscillatons is much more challenging than in the case of boson stars. Different slicing conditions are explored, and a customized gauge condition that approximates polar slicing in spherical symmetry is implemented. Comparisons with 1D results and convergence tests are performed. The behavior of these stars under small axisymmetric perturbations is studied and gravitational waveforms are extracted. We find that the gravitational waves damp out on a short timescale, enabling us to obtain the complete waveform. This work is a starting point for the evolution of real scalar field systems with arbitrary symmetries.

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Cited by 5 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Timing-Window Mechanism for Chain-Like Transients in Collisions of Radially Excited Boson Stars

    gr-qc 2026-05 unverdicted novelty 6.0

    Chain-like transients in boson star collisions are governed by a timing window set by the binary collision time relative to isolated breathing clocks rather than excitation level alone.

  2. Timing-Window Mechanism for Chain-Like Transients in Collisions of Radially Excited Boson Stars

    gr-qc 2026-05 unverdicted novelty 5.0

    Chain-like transients in boson star collisions are controlled by a timing window set by matching binary collision time to the isolated breathing clock rather than excitation level alone.

  3. Massive boson stars: Stability and GW emission in head-on mergers

    gr-qc 2025-12 unverdicted novelty 5.0

    Numerical evolutions of quartically self-interacting boson stars reveal three merger outcomes and a non-monotonic gravitational-wave energy pattern driven by the competition between compactness and tidal deformability.

  4. Massive boson stars: Waveform-based branch diagnosis with neural reconstruction

    gr-qc 2026-06 unverdicted novelty 4.0

    Using an existing numerical-relativity catalogue, the paper builds a branch-conditioned neural reconstruction model that infers boson-star merger outcomes from waveform morphology by comparing reconstruction quality a...

  5. Dynamical Boson Stars

    gr-qc 2012-02 unverdicted novelty 2.0

    Boson stars are particle-like solutions in general relativity that model dark matter, black hole mimickers, and binary systems.