Neutron star in presence of torsion-dilaton field

Abstract

We develop the general theory of stars in Saa's model of gravity with propagating torsion and study the basic stationary state of neutron star. Our numerical results show that the torsion force decreases the role of the gravity in the star configuration leading to significant changes in the neutron star masses depending on the equation of state of star matter. The inconsistency of the Saa's model with Roll-Krotkov-Dicke and Braginsky-Panov experiments is discussed.

29 pages, latex, 24 figures, final version. Added: 1)comments on different possible mass definitions; 2)new sections: a)the inconsistency of the Saa's model with Roll-Krotkov-Dicke and Braginsky-Panov experiments; b)stability analysis via catastrophe theory; 3)new figers added and some figures replaced. 4)new references

References in corpus (6)

• Gravitational Stability of Boson Stars
• X-Ray Novae, Event Horizons and the Exponential Metric
• Gravitational memory of boson stars
• Brans-Dicke Boson Stars: Configurations and Stability through Cosmic History
• Generation of scalar-tensor gravity effects in equilibrium state boson stars
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Cited by in corpus (12)

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• Neutron stars in Einstein-$\Lambda$ gravity: the cosmological constant effects
• Einstein-Cartan gravity with Holst term and fermions
• Tensor mass and particle number peak at the same location in the scalar-tensor gravity boson star models - an analytical proof
• Volume elements and torsion
• Mathematical Modeling of Boson-Fermion Stars in the Generalized Scalar-Tensor Theories of Gravity
• The structure of hybrid neutron star in Einstein-$\Lambda$ gravity
• Nonuniqueness of gravity-induced fermion interaction in the Einstein-Cartan theory
• On the choice of coupling procedure for the Poincaré gauge theory of gravity
• Modified coupling procedure for the Poincaré gauge theory of gravity
• Neutron Stars in Mimetic Gravity
• Maxwell field with Torsion