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42 papers · 2 filters
Numerical Simulations of Mach Stem Formation via Intersecting Bow Shocks
Edward C. Hansen, Adam Frank, Patrick Hartigan
Hubble Space Telescope observations show bright knots of H emission within outflowing young stellar jets. Velocity variations in the flow create secondary bow shocks that may in…
The Hard X-Ray View of the Young Supernova Remnant G1.9+0.3
Andreas Zoglauer, Stephen P. Reynolds, Hongjun An +12
NuSTAR observed G1.9+0.3, the youngest known supernova remnant in the Milky Way, for 350 ks and detected emission up to 30 keV. The remnant's X-ray morphology does not change…
Finding the First Cosmic Explosions. IV. 90 - 140 M Pair-Instability Supernovae
Joseph Smidt, Daniel J. Whalen, E. Chatzopoulos +4
Population III stars that die as pair-instability supernovae are usually thought to fall in the mass range of 140 - 260 M. But several lines of work have now shown that r…
Scaling of magnetic reconnection in relativistic collisionless plasmas
Yi-Hsin Liu, Fan Guo, William Daughton +2
Using fully kinetic simulations, we study the scaling of the inflow speed of collisionless magnetic reconnection from the non-relativistic to ultra-relativistic limit. In the anti-…
Comparisons of Two- and Three-Dimensional Convection in Type I X-ray Bursts
M. Zingale, C. M. Malone, A. Nonaka +2
We perform the first detailed three-dimensional simulation of low Mach number convection preceding thermonuclear ignition in a mixed H/He X-ray burst. Our simulations include a mod…
Search for gamma-rays from the unusually bright GRB 130427A with the HAWC Gamma-ray Observatory
The HAWC collaboration, A. U. Abeysekara, R. Alfaro +90
The first limits on the prompt emission from the long gamma-ray burst (GRB) 130427A in the energy band are reported. GRB 130427A was the most powerful b…