Compact boson stars in K field theories

C. ADAM; N. GRANDI; P. KLIMAS; J. SANCHEZ-GUILLEN; A. WERESZCZYNSKI

CLASSICAL AND QUANTUM GRAVITY

IOP PUBLISHING LTD

Lugar: London; Año: 2010 vol. 42 p. 2663 - 2701

0264-9381

We study a scalar field theory with a non-standard kinetic term minimally coupled to gravity. We establish the existence of compact boson stars, that is, static solutions with compact support of the full system with self-gravitation taken into account. Concretely, there exist two types of solutions, namely compact balls on the one hand, and compact shells on the other hand. The compact balls have a naked singularity at the center. The inner boundary of the compact shells is singular, as well, but it is, at the same time, a Killing horizon. These singular, compact shells therefore resemble black holes.