S
Samuel E. Gralla
Researcher at University of Arizona
Publications - 73
Citations - 2295
Samuel E. Gralla is an academic researcher from University of Arizona. The author has contributed to research in topics: Black hole & General relativity. The author has an hindex of 25, co-authored 70 publications receiving 1773 citations. Previous affiliations of Samuel E. Gralla include Harvard University & University of Chicago.
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Can the EHT M87 results be used to test general relativity
TL;DR: In this article, the authors show that all theoretical predictions for the observational appearance of a supermassive black hole, as measured interferometrically by a sparse Earth-sized array at current observation frequencies, are sensitive to many untested assumptions about accretion flow and emission physics.
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Horizon Instability of Extremal Kerr Black Holes: Nonaxisymmetric Modes and Enhanced Growth Rate
TL;DR: In this article, it was shown that the horizon instability of the extremal Kerr black hole is associated with a singular branch point in the Green function at the superradiant bound frequency.
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Exact solutions to force-free electrodynamics in black hole backgrounds
TL;DR: In this article, a large class of time-dependent and non-axisymmetric exact solutions to the equations of force-free electrodynamics is presented. But their exact solutions are in general time dependent.
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Transient Instability of Rapidly Rotating Black Holes
TL;DR: In this paper, the authors proposed a method to use the Perimeter Institute for Theoretical Physics (PIT) for the analysis of the relationship between the two types of energy.
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Near-horizon Kerr magnetosphere
TL;DR: In this paper, the authors exploit the near-horizon conformal symmetry of rapidly spinning black holes to determine universal properties of their magnetospheres and derive analytical expressions for the limiting form of the magnetosphere in the nearhorizon region.