Compact boson stars in K field theories

Abstract

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.Comment: Latex, 45 pages, 25 figures, some references and comments adde

Dynamical Boson Stars

“…Ref. [1] studies the resulting BSs for a class of K field theories , finding solutions of two types: (i) compact balls possessing a naked singularity at their center and (ii) compact shells with a singular inner boundary which resemble black holes. Ref.…”

Compact vortexlike solutions in a generalized Born-Infeld model

“…As such infinite tails are more than a modeling nuisance, compactons could be able to model more realistically nature. Compactons first appeared in [31] and have gained great interest in high energy physics and in other recent investigations [32][33][34][35], including compact bosonic stars [36].…”

Compact solitons in an Abelian-Higgs Chern-Simons model

“…Also relevant studies have been made on the cosmology context [11,12] and, in particular, on topological defect solutions with the result that their properties can be quite different from the standard canonical ones [13][14][15][16][17][18][19][20][21][22][23][24][25]. For example, these solitons can have a compact support [26][27][28][29][30][31][32][33] being called compactons. Compactons were first introduced by Rosenau et al and Cooper et al, who investigated a special type of Korteweg-de Vries equation [34], discovering that solitary waves may compactify in the presence of a nonlinear dispersion [35,36].…”

“…Making use of this property their only interaction can be made only gravitational when gravity is included. This has been applied in the context of brane cosmology where the compacton acts like a domain wall such that the gravity confinement emerges naturally [17,27,29] or also in the dark matter context as compactons can only interact gravitationally without emission of particle type radiation [33].…”