303 citations · 2k across the 48 of their papers we have counts for
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Static horizons in cosmology
Ida M. Rasulian, Amjad Ashoorioon
Although previous results have ruled out the possibility of a static event horizon in cosmology, we present black hole and white hole metrics that retain static event horizons whil…
Measuring black hole spin through gravitational lensing of pulsars
Amjad Ashoorioon, Mohammad Bagher Jahani Poshteh, Robert B. Mann
We propose a new procedure for measuring the spin of a black hole with an unprecedented accuracy based on the gravitational lensing of millisecond pulsars. We derive the basic equa…
Distinguishing a Slowly Accelerating Black Hole by Differential Time Delays of Images
Amjad Ashoorioon, Mohammad Bagher Jahani Poshteh, Robert B. Mann
Accelerating supermassive black holes, connected to cosmic strings, could contribute to structure formation and get captured by galaxies if their velocities are small. This would m…
Lensing Signatures of a Slowly-Accelerated Black Hole
Amjad Ashoorioon, Mohammad Bagher Jahani Poshteh, Robert B. Mann
Accelerating black holes, connected to cosmic strings could evolve to supermassive black holes. However, if they are going to take part in structure formation and resides at the ce…
On the Tensor/Scalar Ratio in Inflation with UV Cutoff
A. Ashoorioon, R. B. Mann
Anisotropy of the cosmic microwave background radiation (CMB) originates from both tensor and scalar perturbations. To study the characteristics of each of these two kinds of pertu…
Generation of Cosmological Seed Magnetic Fields from Inflation with Cutoff
Amjad Ashoorioon, Robert B. Mann
Inflation has the potential to seed the galactic magnetic fields observed today. However, there is an obstacle to the amplification of the quantum fluctuations of the electromagnet…