Gravitational waves from the collapse and bounce of a stellar core in tensor-scalar gravity

Details Gravitational waves from the collapse and bounce of a stellar core in tensor-scalar gravity Gravitational waves from the collapse and bounce of a stellar core in tensor-scalar gravity

1999-11-16

arxiv.org/abs/astro-ph/9911298v1

Astrophys.J. 533 (2000) 392-405

Astronomy and Astrophysics

Astrophysics

30 pages, 17 figures, uses AASLATEX v4.0 Accepted for publication in the Astrophysical Journal

Scientific paper

10.1086/308627

Tensor-scalar theory of gravity allows the generation of gravitational waves from astrophysical sources, like Supernov\ae{}, even in the spherical case. That motivated us to study the collapse of a degenerate stellar core, within tensor-scalar gravity, leading to the formation of a neutron star through a bounce and the formation of a shock. We discuss in this paper the effects of the scalar field on the evolution of the system, as well as the appearance of strong non-perturbative effects of this scalar field (the so-called ``spontaneous scalarization''). As a main result, we describe the resulting gravitational monopolar radiation (form and amplitude) and discuss the possibility of its detection by the gravitational detectors currently under construction, taking into account the existing constraints on the scalar field. From the numerical point of view it is worthy to point out that we have developed a combined code which uses pseudo-spectral methods, for the evolution of the scalar field, and High Resolution Shock-Capturing schemes, for the evolution of the hydrodynamical system. Although this code has been used to integrate the field equations of that theory of gravity, in the spherically symmetric case, a by-product of the present work is to gain experience for an ulterior extension to multidimensional problems in Numerical Relativity of such numerical strategy.

Affiliated with

Also associated with

No associations

Rating

Gravitational waves from the collapse and bounce of a stellar core in tensor-scalar gravity does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Gravitational waves from the collapse and bounce of a stellar core in tensor-scalar gravity, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Gravitational waves from the collapse and bounce of a stellar core in tensor-scalar gravity will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-304211