Constraining Wormhole Geometries using the Orbit of S2 Star and the Event Horizon Telescope

Abstract

In this paper we study the possibility of having a wormhole (WH) as a candidate for the Sgr A${}^{\star }$ central object and test this idea by constraining their geometry using the motion of S2 star and the reconstructed shadow images. In particular, we consider three WH models, including WHs in Einstein theory, brane-world gravity, and Einstein-Dirac-Maxwell theory. To this end, we have constrained the WH throat using the motion of S2 star and shown that the flare out condition is satisfied. We also consider the accretion of infalling gas model and study the accretion rate and the intensity of the electromagnetic radiation as well as the shadow images.

14 pages, 7 figures. v2: refereed version

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• Black holes surrounded by Einstein clusters as models of dark matter fluid
• Unveiling the nature of SgrA* with the geodesic motion of S-stars
• Traversable Wormhole in Einstein 3-Form Theory With Self-Interacting Potential
• Effect of magnetized plasma on shadow and gravitational lensing of a Reissner-Nordström black hole
• On the parameters of the spherically symmetric parametrized Rezzolla-Zhidenko spacetime through solar system tests, orbit of S2 star about Sgr A${}^{\star }$, and quasiperiodic oscillations
• Kerr-Newman Black Holes in Weyl-Cartan Theory: Shadows and EHT constraints
• Shadow Geometry of Kerr Naked Singularities
• Charged Black Holes with Yukawa Potential
• Accretion flows around exotic tidal wormholes I. Ray-tracing
• Einstein-Rosen bridge from the minimal length
• Constraining a disformal Schwarzschild black hole in DHOST theories with the orbit of the S2 star
• Revisiting Weak Energy Condition and wormholes in Brans-Dicke gravity
• On a Class of Harko-Kovacs-Lobo Wormholes
• Optical appearance of regularized compact objects without an exterior photon sphere