IAFE   05512
INSTITUTO DE ASTRONOMIA Y FISICA DEL ESPACIO
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Apparent shape of rotating braneworld black holes with a cosmological constant (presentación mural, coautor)
Autor/es:
CARLOS M. SENDRA; ERNESTO F. EIROA
Lugar:
Buenos Aires
Reunión:
Conferencia; The 15th International Conference on the Dark Side of the Universe (DSU 2019); 2019
Institución organizadora:
Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Argentina
Resumen:
Extra dimensions play an important role in many gravity theories, within the context of the unification of the physical forces and also in cosmology. In the braneworld cosmological models, proposed in order to give an explanation for the so-called hierarchy problem and motivated by string theory, the ordinary matter is on a three dimensional space (the brane) embedded in a larger space (the bulk), where only gravity can propagate. The (second type) Randall-Sundrum model is the simplest of them, corresponding to a positive tension brane in a bulk with only oneextra dimension. We investigate the shadow cast by rotating black holes in the Randall-Sundrum braneworld scenario, with a tidal charge and the presence of an effective four-dimensional cosmological constant. For different values of the tidal charge and the rotation parameter, we obtain the apparent shape and two observables related to the size and deformation of the shadow. We study the influence of the cosmological constant in each case and finally, we discuss the observational prospects for the supermassive black holes in our galaxy and in M87.