Collisional interactions between self-interacting non-relativistic boson stars: effective potential analysis and numerical simulations
arXiv:1608.00547 · doi:10.1103/PhysRevD.94.063503
Abstract
Scalar particles are a common prediction of many beyond the Standard Model theories. If they are light and cold enough, there is a possibility they may form Bose-Einstein condensates, which will then become gravitationally bound. These boson stars are solitonic solutions to the Einstein-Klein-Gordon equations, but may be approximated in the non-relativistic regime with a coupled Schrödinger-Poisson system. General properties of single soliton states are derived, including the possibility of quartic self-interactions. Binary collisions between two solitons are then studied, and the effects of different mass ratios, relative phases, self-couplings, and separation distances are characterized, leading to an easy conceptual understanding of how these parameters affect the collision outcome in terms of conservation of energy. Applications to dark matter are discussed.
16 pages, 12 figures, accepted for publication at Phys. Rev. D and in production
References in corpus (10)
- Cosmic Structure as the Quantum Interference of a Coherent Dark Wave
- Constraints on the Self-Interaction Cross-Section of Dark Matter from Numerical Simulations of the Merging Galaxy Cluster 1E 0657-5
- Understanding the Core-Halo Relation of Quantum Wave Dark Matter, DM, from 3D Simulations
- Bose-Einstein Condensation of Dark Matter Axions
- Axion dark matter, solitons, and the cusp-core problem
- Head-on collisions of boson stars
- Orbital Dynamics of Binary Boson Star Systems
- Scalar Field Dark Matter: head-on interaction between two structures
- Evolution and dynamical properties of Bose-Einstein condensate dark matter stars
- The OGLE View of Microlensing towards the Magellanic Clouds. II. OGLE-II SMC data