On horizons and wormholes in k-essence theories

K. A. Bronnikov, J. C. Fabris, D. C. Rodrigues

We study the properties of possible static, spherically symmetric configurations in k-essence theories with the Lagrangian functions of the form $F(X)$, $X\equiv {\varphi }_{,\alpha }{\varphi }^{,\alpha }$. A…