تقرير
Modified Gravity at Astrophysical Scales
| العنوان: | Modified Gravity at Astrophysical Scales |
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| المؤلفون: | Cermeño, M., Carro, J., Maroto, A. L., Pérez-García, M. Ángeles |
| المصدر: | Astrophysical Journal, 872:130 (7pp), 2019 |
| سنة النشر: | 2018 |
| المجموعة: | Astrophysics General Relativity and Quantum Cosmology |
| مصطلحات موضوعية: | Astrophysics - Solar and Stellar Astrophysics, Astrophysics - Cosmology and Nongalactic Astrophysics, General Relativity and Quantum Cosmology |
| الوصف: | Using a perturbative approach we solve stellar structure equations for low-density (solar-type) stars whose interior is described with a polytropic equation of state in scenarios involving a subset of modified gravity theories. Rather than focusing on particular theories, we consider a model-independent approach in which deviations from General Relativity are effectively described by a single parameter $\xi$. We find that for length scales below those set by stellar General Relativistic radii the modifications introduced by modified gravity can affect the computed values of masses and radii. As a consequence, the stellar luminosity is also affected. We discuss possible further implications for higher density stars and observability of the effects before described. Comment: 12 pages, 7figures, matches published version |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.3847/1538-4357/ab001c |
| URL الوصول: | http://arxiv.org/abs/1811.11171 |
| رقم الأكسشن: | edsarx.1811.11171 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.3847/1538-4357/ab001c |
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