A5060806864- Cosmology and Gravitation Theories
- Galaxies: Formation, Evolution, Phenomena
- Black Holes and Theoretical Physics
- Gamma-ray bursts and supernovae
- Particle physics theoretical and experimental studies
- Computational Physics and Python Applications
- Astronomy and Astrophysical Research
- Dark Matter and Cosmic Phenomena
- Solar and Space Plasma Dynamics
- Parallel Computing and Optimization Techniques
- Pulsars and Gravitational Waves Research
Donostia International Physics Center
2023
Pontificia Universidad Católica de Chile
2019-2022
Abstract We explore the possibility that primordial black holes (PBHs) contain electric charge down to present day. find PBHs should hold a non-zero net at their formation, due either Poisson fluctuations horizon crossing or high-energy particle collisions. Although initial configurations are subject fast discharge processes through accretion quantum emission, we show maximally rotating could produce magnetic fields able shield them from discharge. Moreover, given electrons lightest and...
ABSTRACT We present a modification of the Press–Schechter (PS) formalism to derive general mass functions for primordial black holes (PBHs), considering their formation as being associated with amplitude linear energy density fluctuations. To accommodate wide range physical relations between and non-linear conditions collapse, we introduce an additional parameter PS mechanism, that collapse occurs at either given cosmic time, or fluctuations enter horizon. study case where obey Gaussian...
We introduce a statistical method for estimating magnetic field fluctuations generated from primordial black hole (PBH) populations. To that end, we consider monochromatic and extended Press-Schechter PBH mass functions, such each constituent is capable of producing its own due to some given physical mechanism. Assuming linear correlation between matter over-densities, our estimates depend on the function, generation mechanism by constituent, characteristic separation. After computing power...
ABSTRACT We study the effect of dark matter (DM) being encapsulated in primordial black holes (PBHs) on power spectrum density fluctuations P(k); we also look at its abundance haloes and their clustering. allow growth Poisson since radiation equality both monochromatic extended PBH mass distributions. present updated hole constraints by demanding $\lt 10{{\ \rm per\ cent}}$ deviations from Λ cold (CDM) a scale k = 1 h Mpc−1. Our results show that PBHs with masses $\gt 10^4\, h^{-1}\,...
ABSTRACT We introduce a modification of the Press–Schechter formalism aimed to derive general mass functions for primordial black holes (PBHs). In this case, we start from power spectra (PPS) which include monochromatic spike, typical ultra slow-roll inflation models. consider PBH formation as being associated amplitude spike on top linear energy density fluctuations coming PPS with blue index. By modelling lognormal function, study properties resulting function spikes, and compare these...
A gravitational field model based on two symmetric tensors, $g_{\mu \nu}$ and $\tilde{g}_{\mu \nu}$, is studied, using a Markov Chain Monte Carlo (MCMC) analysis with the most updated catalog of SN-Ia. In this model, new matter fields are added to original fields, motivated by an additional symmetry ($\tilde{\delta}$~symmetry). We call them $\tilde{\delta}$ fields. This theory predicts accelerating Universe without need introduce cosmological constant $\Lambda$ hand in equations. obtained...
We explore the possibility that primordial black holes (PBHs) contain electric charge down to present day. find PBHs should hold a non-zero net at their formation, due either Poisson fluctuations horizon crossing or high-energy particle collisions. Although initial configurations are subject fast discharge processes through accretion quantum emission, we show maximally rotating could produce magnetic fields able shield them from discharge. Moreover, given electrons lightest and fastest...
We introduce a modification of the Press-Schechter formalism aimed to derive general mass functions for primordial black holes (PBHs). In this case, we start from power spectra (PPS) which include monochromatic spike, typical ultra slow-roll inflation models. consider PBH formation as being associated amplitude spike on top linear energy density fluctuations, coming PPS with blue index. By modelling log-normal function, study properties resulting function spikes, and compare these underlying...