A5047994297- Cosmology and Gravitation Theories
- Galaxies: Formation, Evolution, Phenomena
- Complex Systems and Time Series Analysis
- Black Holes and Theoretical Physics
- Computational Physics and Python Applications
- Particle physics theoretical and experimental studies
- Geophysics and Gravity Measurements
- Astronomy and Astrophysical Research
- Radio Astronomy Observations and Technology
- Statistical Mechanics and Entropy
- Solar and Space Plasma Dynamics
- Dark Matter and Cosmic Phenomena
Valparaiso University
2023
University of Valparaíso
2023
We study the reconstructed deceleration parameter splitting data in different redshift bins, fitting both a cosmographic luminosity distance and also assuming flat $\Lambda$CDM model, using Pantheon+ sample of type Ia supernova (SNIA).We observe tensions $\sim 2\sigma-3\sigma$ for indicators if full is used. However, those disappear when SNIA at $z<0.008$ are removed. If splitted 2 hemispheres according to our movement w.r.t CMB, strange $3.8 \sigma$ tension appears one samples between...
We study the reconstructed deceleration parameter splitting data in different redshift bins, fitting both a cosmographic luminosity distance and also assuming flat $Λ$CDM model, using Pantheon+ sample of type Ia supernova (SNIA). observe tensions $\sim 2σ-3σ$ for indicators if full is used. However, those disappear when SNIA at $z<0.008$ are removed. If splitted 2 hemispheres according to our movement w.r.t CMB, strange $3.8 σ$ tension appears one samples between particular bins. Finally,...
Abstract We revisited the problem of describing, on average, a fractal distribution matter using Lemaitre-Tolman-Bondi (LTB) solution. Here we study structure our local universe having dimension and scale transition, ensuring an homogeneous bang-time function. test model with latest type Ia supernova data, Pantheon compilation, discuss problems possible improvements for it, concluding that transition in LTB cosmology cannot be used to explain effects dark energy without requiring...
We characterize the peculiar velocity field of local large-scale structure reconstructed from $2M++$ survey, by treating it as a fluid, extracting divergence via different approximations over range pf averaged scales. This is important for cosmology, since was used to correct redshifts last SNIA compilation Pantheon+. The results have intriguing implications LLSS fluid dynamics and particularly ``Tilted Cosmology'' model, although those be taken carefully could contain significant bias due...
We characterize the peculiar velocity field of local large-scale structure reconstructed from $2M++$ survey, by treating it as a fluid, extracting divergence via different approximations over range averaged scales. This is important for cosmology, since was used to correct redshifts last SNIA compilation Pantheon+. The results have intriguing implications LLSS fluid dynamics and particularly ``Tilted Cosmology'' model, although those be taken carefully could contain significant bias due...
We revisited the problem of describing, on average, a fractal distribution matter using Lemaitre-Tolman-Bondi (LTB) solution. Here we study structure our local universe having dimension and scale transition, ensuring an homogeneous bang-time function. test model with latest type Ia supernova data, Pantheon compilation, discuss problems possible improvements for it, concluding that transition in LTB cosmology cannot be used to explain effects dark energy without requiring inhomogeneous...