Publication:
Spontaneous scalarization with massive fields

Thumbnail Image

Organizational Units

Program

KU Authors

Co-Authors

Pretorius, F.

Advisor

Publication Date

Language

English

Journal Title

Journal ISSN

Volume Title

Abstract

We study the effect of a mass term in the spontaneous scalarization of neutron stars, for a wide range of scalar field parameters and neutron star equations of state. Even though massless scalars have been the focus of interest in spontaneous scalarization so far, recent observations of binary systems rule out most of their interesting parameter space. We point out that adding a mass term to the scalar field potential is a natural extension to the model that avoids these observational bounds if the Compton wavelength of the scalar is small compared to the binary separation. Our model is formally similar to the asymmetron scenario recently introduced in application to cosmology, though here we are interested in consequences for neutron stars and thus consider a mass term that does not modify the geometry on cosmological scales. We review the allowed values for the mass and scalarization parameters in the theory given current binary system observations and black hole spin measurements. We show that within the allowed ranges, spontaneous scalarization can have nonperturbative, strong effects that may lead to observable signatures in binary neutron star or black hole-neutron star mergers, or even in isolated neutron stars.

Description

Source:

Physical Review D

Publisher:

American Physical Society (APS)

Keywords:

Subject

Physics

Citation

Endorsement

Review

Supplemented By

Referenced By

Copy Rights Note

0

Views

3

Downloads

View PlumX Details