% IMPORTANT: The following is UTF-8 encoded.  This means that in the presence
% of non-ASCII characters, it will not work with BibTeX 0.99 or older.
% Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or
% “biber”.

@ARTICLE{Alawashra:627870,
      author       = {Alawashra, Mahmoud S. A. and Yang, Yuanyuan and Hirata,
                      Christopher M. and Long, Heyang and Pohl, Martin},
      title        = {{M}e{V} cosmic-ray electrons modify the {T}e{V} pair-beam
                      plasma instability},
      journal      = {The astrophysical journal / Part 1},
      volume       = {989},
      issn         = {0004-637X},
      address      = {London},
      publisher    = {Institute of Physics Publ.},
      reportid     = {PUBDB-2025-01652},
      pages        = {37},
      year         = {2025},
      abstract     = {Relativistic pair beams created in the intergalactic medium
                      (IGM) by TeV gamma rays from blazars are expected to produce
                      a detectable GeV-scale electromagnetic cascade, but the
                      cascade component is absent in the spectra of many
                      hard-spectrum TeV-emitting blazars. One common explanation
                      is that weak intergalactic magnetic fields deflect the
                      electron–positron pairs away from our line of sight. An
                      alternative possibility is that electrostatic beam-plasma
                      instabilities drain the energy of these pairs before a
                      cascade can develop. Recent studies have shown that beam
                      scattering by oblique electrostatic modes leads to minimal
                      energy loss. But these modes might be suppressed by linear
                      Landau damping (LLD) due to MeV-scale cosmic-ray electrons
                      in the IGM. In this work, we explore the impact of LLD on
                      the energy-loss efficiency of plasma instabilities in pair
                      beams associated with 1ES 0229+200. We find that LLD
                      effectively suppresses oblique electrostatic modes, while
                      quasi-parallel ones grow to larger amplitudes. In this way,
                      LLD enhances the energy-loss efficiency of the instability
                      by more than an order of magnitude.},
      cin          = {$Z_THAT$},
      ddc          = {520},
      cid          = {$I:(DE-H253)Z_THAT-20210408$},
      pnm          = {613 - Matter and Radiation from the Universe (POF4-613) /
                      DFG project G:(GEPRIS)390783311 - EXC 2094: ORIGINS: Vom
                      Ursprung des Universums bis zu den ersten Bausteinen des
                      Lebens (390783311)},
      pid          = {G:(DE-HGF)POF4-613 / G:(GEPRIS)390783311},
      experiment   = {EXP:(DE-MLZ)NOSPEC-20140101},
      typ          = {PUB:(DE-HGF)16},
      doi          = {10.3847/1538-4357/adec9e},
      url          = {https://bib-pubdb1.desy.de/record/627870},
}