Can I read Stable gravastar with large surface redshift in Einstein's gravity with two scalar fields on EtoBox?

Stable gravastar with large surface redshift in Einstein's gravity with two scalar fields by Nojiri, Shin'ichi; Nashed, G. G. L. is a scholarly article available to read on EtoBox.

What is Stable gravastar with large surface redshift in Einstein's gravity with two scalar fields about?

We propose a class of models, in which stable gravastar with large surface redshift becomes a solution. In recent decades, gravastars have become a plausible substitute for black holes. Researchers have explored stable gravastar models in various alternative gravity theories, in addition to the conventional framework of general relativity. In this paper, we present a stellar model within the framework of Einstein's gravity with two scalar fields, in accordance with the conjecture proposed by Mazur and Mottola [Proc. Nat. Acad. Sci. \textbf{101} (2004), 9545-9550]. In the model, the two scalar fields become non-dynamical by imposing constraints in order to avoid ghosts. The gravastar comprises two distinct regions, namely: (a) the interior region and (b) the exterior region. We assume the interior region consists of the de Sitter spacetime, and the exterior region is the Schwarzschild one. The two regions are connected with each other by the shell region. On the shell, we assume that the metric is given by a polynomial function of the radial coordinate $r$. The function has six constants. These constants are fixed by the smooth junction conditions, i.e., the interior region with the

Author

Nojiri, Shin'ichi; Nashed, G. G. L.

Published

2023

Language

EN