3 papers
astro-ph.HE2026
Probing the Three-Dimensional Structure of a Jet with Faraday Tomography
Sawera Gull, Masaya Kurogi, Keitaro Takahashi
Magnetic fields play a fundamental role in the dynamics and radiation of jets associated with active galactic nuclei (AGNs), where they accelerate and collimate the relativistic pl…
gr-qc2026
Dynamics of quadratic f(R) cosmology with a perfect fluid: Jordan and Einstein frames
Artur Alho, Margarida Lima, Filipe C. Mena
We investigate the global dynamics of the field equations of (pure) quadratic theories of gravity which generalise Einstein's theory in spatially flat homogeneous and isotropic cos…
gr-qc2026
Black hole shadows in nonminimally coupled Weyl connection gravity
Cláudio Gomes, Margarida Lima, Francisco S. N. Lobo +1
We study black hole shadows in nonminimally coupled Weyl connection gravity, a metric-affine extension of general relativity in which spacetime is described by a metric and a Weyl…