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228 papers
Photon rings as tests for alternative spherically symmetric geometries with thin accretion disks
Luís F. Dias da Silva, Francisco S. N. Lobo, Gonzalo J. Olmo +1
The imaging by the Event Horizon Telescope (EHT) of the supermassive central objects at the heart of the M87 and Milky Way (Sgr A) galaxies, has marked the first step into…
Irreversible Geometrothermodynamics of Open Systems in Modified Gravity
Miguel A. S. Pinto, Tiberiu Harko, Francisco S. N. Lobo
In this work, we explore the formalism of the irreversible thermodynamics of open systems and the possibility of gravitationally generated particle production in modified gravity.…
Wormholes with matter haunted by conformally coupled ghosts
Bruno J. Barros, Álvaro de la Cruz-Dombriz, Francisco S. N. Lobo
In this work, we present novel analytical solutions for static and spherically symmetric wormhole geometries threaded by an anisotropic distribution of matter conformally coupled t…
Dynamical reconstruction of the CDM model in scalar-tensor gravity
Tiago B. Gonçalves, João Luís Rosa, Francisco S. N. Lobo
In this work, we use the dynamical system approach to explore the cosmological background evolution of the scalar-tensor representation of gravity, where is the Ricci…
Thick branes via higher order field theory models with exponential and power-law tails
Marzieh Peyravi, Samira Nazifkar, Francisco S. N. Lobo +1
In this work, we obtain exact thick brane models in dimensions generated by higher order field theory kinks, inspired by specific potentials for and models.…
Dynamical analysis of the redshift drift in FLRW universes
Francisco S. N. Lobo, José Pedro Mimoso, Jessica Santiago +1
Redshift drift is the phenomenon whereby the observed redshift between an emitter and observer comoving with the Hubble flow in an expanding FLRW universe will slowly evolve -- on…