Rapidly rotating neutron stars with a massive scalar field - structure and universal relations

Abstract

We construct rapidly rotating neutron star models in scalar-tensor theories with a massive scalar field. The fact that the scalar field has nonzero mass leads to very interesting results since the allowed range of values of the coupling parameters is significantly broadened. These deviations from pure general relativity can be very large for values of the parameters that are in agreement with the observations. The rapid rotation can magnify the differences several times compared to the static case. The universal relations between the normalized moment of inertia and quadrupole moment are also investigated both for the slowly and rapidly rotating cases. The results show that these relations are still EOS independent up to a large extend and the deviations from pure general relativity can be large. This places the massive scalar-tensor theories amongst the few alternative theories of gravity that can be tested via the universal $I$-Love-$Q$ relations.

10 pages, 2 figures

References in corpus (12)

• A Massive Pulsar in a Compact Relativistic Binary
• The relativistic pulsar-white dwarf binary PSR J1738+0333 II. The most stringent test of scalar-tensor gravity
• Neutron-star mergers in scalar-tensor theories of gravity
• Non-radial oscillations of anisotropic neutron stars in the Cowling approximation
• I-Love-Q, Spontaneously: Slowly Rotating Neutron Stars in Scalar-Tensor Theories
• Invariant quantities in the scalar-tensor theories of gravitation
• Quadrupole Moments of Rapidly Rotating Compact Objects in Dilatonic Einstein-Gauss-Bonnet Theory
• Rapidly rotating neutron stars in $R$-squared gravity
• Universality of the Acceleration Due to Gravity on the Surface of a Rapidly Rotating Neutron Star
• Universal I-Q relations for rapidly rotating neutron and strange stars in scalar-tensor theories
• Multipole moments in scalar-tensor theory of gravity
• Testing scalar-tensor theories and PPN parameters in Earth orbit

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