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gr-qc2015★ 1 cited
Shapiro Delays at the Quadrupole Order for Tests of the No-Hair Theorem Using Pulsars around Spinning Black Holes
Pierre Christian, Dimitrios Psaltis, Abraham Loeb
One avenue for testing the no-hair theorem is obtained through timing a pulsar orbiting close to a black hole and fitting for quadrupolar effects on the time-of-arrival of pulses.…
astro-ph.HE2015
Mapping the Dynamics of Cold Gas around Sgr A* through 21 cm Absorption
Pierre Christian, Abraham Loeb
The presence of a circumnuclear stellar disk around Sgr A* and megamaser systems near other black holes indicates that dense neutral disks can be found in galactic nuclei. We show…
astro-ph.IM2015★ 8 cited
Probing the Spacetime Around Supermassive Black Holes with Ejected Plasma Blobs
Pierre Christian, Abraham Loeb
Millimeter-wavelength VLBI observations of the supermassive black holes in Sgr A* and M87 by the Event Horizon Telescope could potentially trace the dynamics of ejected plasma blob…