تقرير
Boson stars in massless and massive scalar-tensor gravity
| العنوان: | Boson stars in massless and massive scalar-tensor gravity |
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| المؤلفون: | Evstafyeva, Tamara, Rosca-Mead, Roxana, Sperhake, Ulrich, Brugmann, Bernd |
| المصدر: | Phys. Rev. D 108, 104064, 2023 |
| سنة النشر: | 2023 |
| المجموعة: | General Relativity and Quantum Cosmology |
| مصطلحات موضوعية: | General Relativity and Quantum Cosmology |
| الوصف: | We study phenomenological features and stability of boson stars in massless and massive scalar-tensor theory of gravity with Damour-Esposito-Farese coupling. This coupling between the tensor and scalar sectors of the theory leads to a phenomenon called spontaneous scalarization, the onset of which we investigate by numerically computing families of boson-star models using shooting and relaxation algorithms. We systematically explore the effects of the theory's coupling, the mass of the gravitational scalar and the choice of the bosonic potential on the structure of weakly and strongly scalarized solutions. Scalarized boson-star models share many common features with neutron stars in the same scalar-tensor theory of gravity. In particular, scalarization can result in boson stars with significantly larger radii and masses, which tend to be energetically favored over their weakly or non-scalarized counterparts. Overall, we find that boson stars are not quite as susceptible to scalarization as neutron stars. Comment: 26 pages, 20 figures, to match version published in PRD (due to the large number of figures, some panels may appear blank if viewed from the browser, we recommend downloading the paper and viewing it locally to avoid these issues) |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevD.108.104064 |
| URL الوصول: | http://arxiv.org/abs/2310.05200 |
| رقم الأكسشن: | edsarx.2310.05200 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevD.108.104064 |
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