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12 papers · 2 filters
The 2D Distribution of Iron Rich Ejecta in the Remnant of SN 1885 in M31
Robert A. Fesen, Peter Hoeflich, Andrew J. S. Hamilton
We present Hubble Space Telescope (HST) ultraviolet Fe I and Fe II images of the remnant of Supernova 1885 (S And) which is observed in absorption against the bulge of the Andromed…
The general relativistic equations of radiation hydrodynamics in the viscous limit
Eric R. Coughlin, Mitchell C. Begelman
We present an analysis of the general relativistic Boltzmann equation for radiation, appropriate to the case where particles and photons interact through Thomson scattering, and de…
The Proper Motion of the Galactic Center Pulsar Relative to Sagittarius A*
Geoffrey C. Bower, Adam Deller, Paul Demorest +12
We measure the proper motion of the pulsar PSR J1745-2900 relative to the Galactic Center massive black hole, Sgr A*, using the Very Long Baseline Array (VLBA). The pulsar has a tr…
Reconciling models of luminous blazars with magnetic fluxes determined by radio core shift measurements
Krzysztof Nalewajko, Marek Sikora, Mitchell C. Begelman
Estimates of magnetic field strength in relativistic jets of active galactic nuclei (AGN), obtained by measuring the frequency-dependent radio core location, imply that the total m…
Misaligned accretion on to supermassive black hole binaries
Alex Dunhill, Richard Alexander, Chris Nixon +1
We present the results of high-resolution numerical simulations of gas clouds falling onto binary supermassive black holes to form circumbinary accretion discs, with both prograde…
The extent of power-law energy spectra in collisionless relativistic magnetic reconnection in pair plasmas
G. R. Werner, D. A. Uzdensky, B. Cerutti +2
Using two-dimensional particle-in-cell simulations, we characterize the energy spectra of particles accelerated by relativistic magnetic reconnection (without guide field) in colli…