3 papers
gr-qc2026
Cosmological redshift of a Schwarzschild-de Sitter black hole: Towards estimating the Hubble constant
Deborah Villaraos, Alfredo Herrera-Aguilar, Mehrab Momennia +1
In this work we estimate the parameters of several astrophysical black holes hosted at the core of active galactic nuclei by studying the kinematics of test objects in their accret…
physics.gen-ph2026
Cosmological evolution of collisionless relativistic gases as dark matter
Francisco X. Linares Cedeño, Ulises Nucamendi, Olivier Sarbach
We study a phenomenological dark matter model described as a collisionless relativistic kinetic gas in a spatially flat Friedmann-Lemaître-Robertson-Walker universe. After normali…
gr-qc2025
Revisiting purely kinetic k-essence
Israel Quiros, Tame Gonzalez, Ulises Nucamendi +2
In this paper, we perform a dynamical systems study of the purely kinetic k-essence. Although these models have been studied in the past, a full study of the dynamics in the phase…