Unified picture of Q-balls and boson stars via catastrophe theory

Details Unified picture of Q-balls and boson stars via catastrophe theory Unified picture of Q-balls and boson stars via catastrophe theory

2011-05-08

arxiv.org/abs/1105.1498v1

Phys.Rev.D81:124041,2010

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

10 pages, 13 figures

Scientific paper

10.1103/PhysRevD.81.124041

We make an analysis of Q-balls and boson stars using catastrophe theory, as an extension of the previous work on Q-balls in flat spacetime. We adopt the potential $V_3(\phi)={m^2\over2}\phi^2-\mu\phi^3+\lambda\phi^4$ for Q-balls and that with $\mu =0$ for boson stars. For solutions with $|g^{rr}-1|\sim 1$ at its peak, stability of Q-balls has been lost regardless of the potential parameters. As a result, phase relations, such as a Q-ball charge versus a total Hamiltonian energy, approach those of boson stars, which tell us an unified picture of Q-balls and boson stars.

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