Impact of New Conformal Coupling on Spontaneous Scalarization of Neutron Stars

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Abstract

The scalar-tensor gravity as one of the alternative theories of general relativity has some interesting features. In the case of compact objects it predicts a unique phenomenon which is known as spontaneous scalarization, as shown by Damour and Espasito-Farese [1]. This phenomenon does not appear within the general relativity. In this note, we investigate a new conformal coupling function i.e., A = 1 - ln[1 - 0.5β - 0)2] and its consequences in neutron stars. In the case of a polytropic equation of state, we have found that the spontaneous scalarization starts to appear when βc ≈ -4.35. We also found that for the realistic equation of states the βc depends on the composition and the stiffness of the equation of state.

Original languageEnglish
Article number012010
JournalJournal of Physics: Conference Series
Volume1354
Issue number1
DOIs
Publication statusPublished - 30 Oct 2019
EventConference on Theoretical Physics and Nonlinear Phenomena 2018, CTPNP 2018 - Makassar, Indonesia
Duration: 2 Jul 20183 Jul 2018

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