Nesta sexta-feira, dia 12/06, às 10:00h, teremos a palestra de Debadri Bhattacharjee (ICARD, Índia) intitulada
Studies on the properties of Compact Objects in General Relativity and Modified Gravity
A palestra será ministrada no modo remoto através do link
https://meet.google.com/uvj-fsiy-ovf
Palestrante: Debadri Bhattacharjee (ICARD, Índia)
Compact astrophysical objects provide a unique laboratory for probing the behaviour of matter and gravity under extreme physical conditions that cannot be reproduced terrestrially. In this seminar, I shall present an overview of my doctoral research devoted to the theoretical investigation of compact objects within both General Relativity and modified theories of gravity and try to discuss the observational results from the developed models. The study encompasses a wide spectrum of exotic configurations, including strange stars, gravastars, dark energy stars, and anisotropic compact objects, with particular emphasis on their stability, internal structure, and maximum mass limits. Special attention will be given to the role of quark matter physics, dark energy in determining the macroscopic properties of compact objects. Furthermore, the implications of alternative gravitational frameworks such as f(R,T) gravity, Rastall gravity will be discussed in the context of explaining massive compact stars. The seminar will highlight several novel key results, including the prediction of enhanced maximum mass limits for compact stars, the construction of gravastars and singularity-free dark energy star models, and the influence of modified gravity on the equilibrium and stability criteria of ultra-dense stellar configurations. The compatibility of these theoretical models with recent astrophysical observations, including high-mass pulsar measurements, GW events and multimessenger constraints, will also be addressed. These investigations contribute to our understanding of the equation of state of dense matter and provide valuable insights into the interplay between fundamental interactions and gravitational physics in the strong-field regime.
