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A General Relativistic Null Hypothesis Test with Event Horizon Telescope Observations of the black-hole shadow in Sgr A*
Dimitrios Psaltis, Feryal Ozel, Chi-Kwan Chan +1
The half opening angle of a Kerr black-hole shadow is always equal to (5+-0.2)GM/Dc^2, where M is the mass of the black hole and D is its distance from the Earth. Therefore, measur…
Relative Astrometry of Compact Flaring Structures in Sgr A* with Polarimetric VLBI
Michael D. Johnson, Vincent L. Fish, Sheperd S. Doeleman +3
We demonstrate that polarimetric interferometry can be used to extract precise spatial information about compact polarized flares of Sgr A*. We show that, for a faint dynamical com…
The Redshift Evolution of the Mean Temperature, Pressure, and Entropy Profiles in 80 SPT-Selected Galaxy Clusters
M. McDonald, B. A. Benson, A. Vikhlinin +63
(Abridged) We present the results of an X-ray analysis of 80 galaxy clusters selected in the 2500 deg^2 South Pole Telescope survey and observed with the Chandra X-ray Observatory.…