3 papers
astro-ph.CO2026
Dark energy and negative compressibility of the Universe: A study based on cosmic equations of state
Felipe A. Asenjo, Ósmar Rodríguez, Ariel Órdenes Morales +1
All cosmological models are defined through energy and matter, which describe the evolution of the targeted Universe. Whether the content is simple or complex, it can be defined th…
astro-ph.CO2026
A new magnitude--redshift relation based on Type Ia supernovae
Ósmar Rodríguez, Alejandro Clocchiatti
We present a new empirical relation between the standardized magnitude () of Type Ia supernovae (SNe Ia) and redshift (). Using Pantheon+ and DES-SN5YR, we find a negative li…
astro-ph.CO2024
Global Anisotropies of
Alejandro Clocchiatti, Ósmar Rodríguez, Ariel Órdenes Morales +1
An analysis of the Cosmological Constant fitted to subsamples of the Pantheon+ Type Ia SN sample spanning 2 sterradians for a grid of 432 pole positions covering the whole…