NLTE calculations indicate strontium is required to explain the onset of the 1μm feature at early times in AT2017gfo, while helium can dominate at later epochs with plausible masses.
Ghisellini, Radiative Processes in High Energy Astrophysics, vol
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An empirical kernel for Bethe-Heitler pair spectra is introduced and applied to argue that synchrotron emission from these pairs can explain gamma-ray emission in low- and intermediate-peaked blazars for jet regions of size ~10^15 cm and B = 5-500 G.
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Strontium and helium in the kilonova AT2017gfo: Origin of the 1{\mu}m feature constrained via NLTE calculations
NLTE calculations indicate strontium is required to explain the onset of the 1μm feature at early times in AT2017gfo, while helium can dominate at later epochs with plausible masses.
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A closer look at the electromagnetic signatures of Bethe-Heitler pair production process in blazars
An empirical kernel for Bethe-Heitler pair spectra is introduced and applied to argue that synchrotron emission from these pairs can explain gamma-ray emission in low- and intermediate-peaked blazars for jet regions of size ~10^15 cm and B = 5-500 G.