On the stability of cubic galileon accretion
We examine the linear stability of the nongravitating steady-state galileon accretion for the case of a Schwarzcshild black hole. Considering the galileon action up to the cubic term in a static and spherically symmetric background we obtain the general solution for the equation of motion which is divided into two branches. By perturbing this solution we define an effective metric which determines the propagation of fluctuations. In this general picture we establish the position of the sonic horizon together with the matching condition of the two branches on it. Restricting to the case of a Schwarzschild background, we show, via the analysis of the energy of the perturbations and its time derivative, that the accreting field is linearly stable. - Highlights: • The linear stability of the nongravitating galileon accretion for the Schwarzschild BH is examined. • The galileon action up to the cubic term in a static and spherically symmetric background is considered. • It is shown that the accreting field is linearly stable.
- OSTI ID:
- 22701526
- Journal Information:
- Annals of Physics, Vol. 384; Other Information: Copyright (c) 2017 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-4916
- Country of Publication:
- United States
- Language:
- English
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