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Stellar Structure and Evolution With Varying Fundamental Couplings

J. P. P. Vieira, C. J. A. P. Martins, M. J. P. F. G. Monteiro

We discuss the feasibility of using solar-type main-sequence stars as probes of fundamental physics and unification. We use a simple polytropic stellar structure model and study its sensitivity to variations of the gravitational, strong and electroweak coupling constants in the context of unification scenarios. We quantify the sensitivity of the Sun's interior temperature to these variations, finding |Δα/α| < 1.3×10-4 for a ‘canonical’ choice of unification scenario, and discuss prospects for future improvements. Further details can be found in [1].

Nuclear Physics in Astrophysics VI (NPA6)
19–24 May 2013, Lisbon, Portugal

Journal of Physics: Conference Series

IOP Science
Volume 665, Number 1
2016 January

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Instituto de Astrofísica e Ciências do Espaço Universidade do Porto Faculdade de Ciências da Universidade de Lisboa
Fundação para a Ciência e a Tecnologia COMPETE 2020 PORTUGAL 2020 União Europeia