Speaker
German Lugones
(UFABC)
Description
According to braneworld models the observable universe could be restricted to a 1+3 surface (a “brane” where Standard Model particles and fields are trapped) embedded in a higher dimensional spacetime (the “bulk”) that can be accessed by gravity. In this work we investigate the properties of compact stars in the Randall-Sundrum II type braneworld. Adopting the well established BPS equation of state below a fiducial density, and a causal equation of state above it, we solve the Tolman-Oppenheimer-Volkoff equations on the brane and obtain the causal limit for stellar configurations in the mass-radius diagram. Such limit is different to the one obtained within the frame of general relativity due to local and nonlocal extra-dimensional modifications to the structure equations on the brane. We analyse the properties of quark and hadronic stars using the MIT bag model and a relativistic mean-field model for the equation of state. We examine the stability of the stellar configurations and discuss smoking guns for extra dimensions that could emerge from future compact star observations.
Author
German Lugones
(UFABC)
