Constraint on the spectral index from primordial black holes

• Autores: Yana Galarza, J., Vargas Auccalla, T., Vera Cervantes, V. D., Aguilar Hurtado, M. L.
• Formato: artículo
• Fecha de Publicación: 2013
• Institución: Universidad Nacional Mayor de San Marcos
• Repositorio: Revistas - Universidad Nacional Mayor de San Marcos
• Lenguaje: español
• OAI Identifier: oai:ojs.csi.unmsm:article/8682
• Enlace del recurso: https://revistasinvestigacion.unmsm.edu.pe/index.php/fisica/article/view/8682
• Nivel de acceso: acceso abierto
• Materia: Agujeros negros primordiales; índice espectral; espectro de potencias.; Primordial black hole; spectral index; power spectrum.

We analyse the process of gravitational collapse using Press-Schechter theory in order to predict the existence of Primordial Black Holes, PBHs, using the Josan’s restriction and the latest cosmological parameters measured by Planck satellite. Assuming a gaussian fluctuation on the perturbation in the early Universe, we find that PBHs with mass M > 1012 kg, have not evaporated yet. Comparing with the mass fraction PBH = 10−20 and assuming that the PBHs energy density should not exceed the Cold Dark Matter, CDM, energy density, we constraint the spectral index (blue espectra) to ns < 1.4 and obtain a value of the power spectrum P ≈ 10−2.