Can I read Multipole Moments and Universal Relations for Scalarized Neutron Stars on EtoBox?

Multipole Moments and Universal Relations for Scalarized Neutron Stars by Pappas, George; Doneva, Daniela D.; Sotiriou, Thomas P.; Yazadjiev, Stoytcho S.; Kokkotas, Kostas D. is a scholarly article available to read on EtoBox.

What is Multipole Moments and Universal Relations for Scalarized Neutron Stars about?

In recent years there has been a surge of interest in what has come to be known as the `universal relations' between various global properties of neutron stars. These universal relations are equation of state independent relations between quantities such as the moment of inertia $I$, the tidal deformability or Love number $\lambda$, and the quadrupole $Q$ (I-Love-Q relations), or the relativistic multipole moments (3-hair relations). While I-Love-Q relations have been studied extensively in both general relativity and various alternatives, 3-hair relations have been studied only in general relativity. Recent progress on the definition of the multipole moments of a compact object in the case of scalar-tensor theories allows for the study of 3-hair relations in modified theories of gravity. Specifically, the aim of this work is to study them for scalarized stars in scalar-tensor theories with a massless scalar field that admit spontaneous scalarization. We find that the 3-hair relations between the mass and angular momentum moments that hold in general relativity hold for scalarized stars as well. The scalar moments also exhibit a universal behaviour, which is equation of state indep

Author

Pappas, George; Doneva, Daniela D.; Sotiriou, Thomas P.; Yazadjiev, Stoytcho S.; Kokkotas, Kostas D.

Published

2018

Language

EN