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9 papers · 2 filters
Black hole-neutron star binary merger: Dependence on black hole spin orientation and equations of state
Kyohei Kawaguchi, Koutarou Kyutoku, Hiroyuki Nakano +3
We systematically performed numerical-relativity simulations for black hole (BH) - neutron star (NS) binary mergers with a variety of the BH spin orientation and equations of state…
Electron and Ion Acceleration in Relativistic Shocks with Applications to GRB Afterglows
Donald C. Warren, Donald C. Ellison, Andrei M. Bykov +1
We have modeled the simultaneous first-order Fermi shock acceleration of protons, electrons, and helium nuclei by relativistic shocks. By parameterizing the particle diffusion, our…
The Fate of Dead Radio-loud Active Galactic Nuclei: A New Prediction of Long-lived Shell Emission
Hirotaka Ito, Motoki Kino, Nozomu Kawakatu +1
We examine the fate of a dead radio source in which jet injection from the central engine has stopped at an early stage of its evolution ( yr). To this aim,…
X-ray Fading and Expansion in the "Miniature Supernova Remnant" of GK Persei
D. Takei, J. J. Drake, H. Yamaguchi +3
We report on a second epoch of Chandra X-ray imaging spectroscopy of the spatially-resolved old nova remnant GK Persei. An ACIS-S3 observation of 97.4 ks was conducted in November…
Are Models for Core-Collapse Supernova Progenitors Consistent with the Properties of Supernova Remnants?
Daniel J. Patnaude, Shiu-Hang Lee, Patrick O. Slane +4
The recent discovery that the Fe-K line luminosities and energy centroids observed in nearby SNRs are a strong discriminant of both progenitor type and circumstellar environment ha…
Locating the most energetic electrons in Cassiopeia A
Brian W. Grefenstette, Stephen P. Reynolds, Fiona A. Harrison +17
We present deep (2.4 Ms) observations of the Cassiopeia A supernova remnant with {\it NuSTAR}, which operates in the 3--79 keV bandpass and is the first instrument capable of sp…