AT1 - Extended Theories of Gravity and Quantum Cosmology |
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Speaker |
Fiziev, Plamen |
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| Talk Title |
The Mass of Dark Scalar and Phase Space Analysis of Realistic Models of Neutron Stars |
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Abstract |
A new dark scalar field ϕ which is responsible for simultaneous description of the observed effects of dark matter and dark energy and solves the well-known difficulties in numerical investigation of realistic models of neutron stars in modified gravity is introduced. The value of its mass is critical for study of the singular manifolds in the five dimensional phase space of the spherically symmetric static neutron stars with realistic equation of state. A Lyapunov function for phase space analysis of the solutions is constructed and used for the first time. References:1.P. P. Fiziev, Phys. Rev. D 87, 0044053 (2013); arXiv:1209.2695. 2.Plamen Fiziev, Symposium "Frontiers of Fundamental Physics 14", Marseille, France, July, 15-18, 2014, PoS(FFP14) 080; arXiv:1411.0242; 3.Plamen Fiziev, Kalin Marinov, Bulgarian Astronomical Journal, 23, p.1, (2015); arXiv:1412.3015.4.Plamen Fiziev, A realistic model of a neutron star in a modified theory of gravity, talk at the Annual NewCompStarConference, 15-19 June 2015, Budapest:http://indico.kfki.hu/event/254/session/5/contribution/134/material/slides/0.pdf |
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