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51 papers · 2 filters
Evidence of 200 TeV photons from HAWC J1825-134
A. Albert, R. Alfaro, C. Alvarez +81
The Earth is bombarded by ultra-relativistic particles, known as cosmic rays (CRs). CRs with energies up to a few PeV (=10 eV), the knee in the particle spectrum, are believ…
Swift Multiwavelength Follow-up of LVC S200224ca and the Implications for Binary Black Hole Mergers
N. J. Klingler, A. Lien, S. R. Oates +41
On 2020 February 24, during their third observing run ("O3"), the Laser Interferometer Gravitational-wave Observatory and Virgo Collaboration (LVC) detected S200224ca: a candidate…
Pair Drizzle around Sub-Eddington Supermassive Black Holes
George N. Wong, Benjamin R. Ryan, Charles F. Gammie
Electron-positron pair creation near sub-Eddington accretion rate black holes is believed to be dominated by the Breit-Wheeler process (photon-photon collisions). The interacting h…
Black Hole Spin in X-ray Binaries: Giving Uncertainties an
Greg Salvesen, Jonah M. Miller
The two established techniques for measuring black hole spin in X-ray binaries often yield conflicting results, which must be resolved before either method may be deemed robust. In…
Astromers: Nuclear Isomers in Astrophysics
G. Wendell Misch, Surja K. Ghorui, Projjwal Banerjee +2
We develop a method to compute thermally-mediated transition rates between the ground state and long-lived isomers in nuclei. We also establish criteria delimiting a thermalization…
Astromers in the radioactive decay of r-process nuclei
G. Wendell Misch, T. M. Sprouse, M. R. Mumpower
We study the impact of astrophysically relevant nuclear isomers (astromers) in the context of the rapid neutron capture process (r-process) nucleosynthesis. We compute thermally me…