CM4 - Tensions on LCDM cosmological model and model-independent constraints |
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Speaker |
Di Gioia, Federico |
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Coauthors |
Di Gioia, Federico; Montani, Giovanni |
| Talk Title |
Cosmological perturbations and gravitational instability of an anisotropic Bianchi I model with a uniform magnetic field |
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Abstract |
In this work, we study the effect of a magnetic field on the growth of cosmological perturbations. We develop a mathematical consistent treatment in which a perfect fluid and a uniform magnetic field evolve together in a Bianchi~I universe. We then study the density perturbations on this background with particular emphasis on the effect of the background magnetic field. We develop a solution in the Newtonian treatment with adiabatic sound speed in the isotropic limit and the full relativistic anisotropic solution for perturbations in the directions parallel and perpendicular to the background magnetic field when the sound speed is zero. We also find an equation for the general solution of the problem which could be numerically integrated. |
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Talk view |
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