activity
20052026
most citedBlack Hole Shadows, Photon Rings, and Lensing Rings

668 citations · 3.4k across the 62 of their papers we have counts for

collaborators
Showing astro-ph.HEShow all

17 papers · 1 filter

astro-ph.HE2025

Plasma flow in force-free magnetospheres: two-fluid model near pulsars and black holes

Morifumi Mizuno, Samuel E. Gralla, Alexander Philippov

Force-free electrodynamics describes the electromagnetic field of the magnetically dominated plasma found near pulsars and active black holes, but gives no information about the un…

astro-ph.HE2023★ 4 cited

Dynamics of ultrarelativistic charged particles with strong radiation reaction. II. Entry into Aristotelian equilibrium

Yangyang Cai, Samuel E. Gralla, Vasileios Paschalidis

As first proposed by Gruzinov, a charged particle moving in strong electromagnetic fields can enter an equilibrium state where the power input from the electric field is balanced b…

astro-ph.HE2022★ 10 cited

Dynamics of ultrarelativistic charged particles with strong radiation reaction. I. Aristotelian equilibrium state

Yangyang Cai, Samuel E. Gralla, Vasileios Paschalidis

Previous studies from the astrophysics and laser physics communities have identified an interesting phenomenon wherein ultrarelativistic charged particles experiencing strong radia…

astro-ph.HE2022★ 36 cited

How narrow is the M87* ring? II. A new geometric model

Will Lockhart, Samuel E. Gralla

The 2017 Event Horizon Telescope (EHT) observations of M87* detected a ring-shaped feature as in diameter, consistent with the event horizon scale of a black hole of the e…

astro-ph.HE2021

How narrow is the M87* ring? I. The choice of closure likelihood function

Will Lockhart, Samuel E. Gralla

Event Horizon Telescope (EHT) observations of the core of the galaxy M87 suggest an observational appearance dominated by a ring of approximately 40as in diameter. The thickness…

astro-ph.HE2020★ 121 cited

Can the EHT M87 results be used to test general relativity?

Samuel E. Gralla

No. All theoretical predictions for the observational appearance of an accreting supermassive black hole, as measured interferometrically by a sparse Earth-sized array at current o…