684 citations · 13.5k across the 217 of their papers we have counts for
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Evidence for the Sombrero Galaxy as an Accelerator of the Highest-Energy Cosmic Rays
Hao-Ning He, Eiji Kido, Kai-Kai Duan +12
Ultrahigh-energy cosmic rays (UHECRs) are the highest energy messenger from space, with energies exceeding 1 EeV. Although UHECRs were discovered over 60 years ago, their origin st…
The possibility of multi-TeV secondary gamma rays from GRB221009A
Oleg Kalashev, Felix Aharonian, Warren Essey +2
The brightest gamma ray burst (GRB) ever observed, GRB221009A, produced a surprisingly large flux of gamma rays with multi-TeV energies, which are expected to be absorbed in intera…
Neutrinos and gamma rays from beta decays in an active galactic nucleus NGC 1068 jet
Koichiro Yasuda, Nobuyuki Sakai, Yoshiyuki Inoue +1
We show that TeV neutrinos and high-energy gamma rays detected from the nearby active galaxy NGC 1068 can simultaneously be explained in a model based on the beta decays of neutron…
Explaining the GeV excess with exploding black holes
Zachary S. C. Picker, Alexander Kusenko
Black holes may form in present-day collapse of microscopic structures of dark matter. We show that, if microstructure black holes (MSBH) with mass are produced,…
JEM-EUSO Collaboration contributions to the 37th International Cosmic Ray Conference
G. Abdellaoui, S. Abe, J. H. Adams +289
Compilation of papers presented by the JEM-EUSO Collaboration at the 37th International Cosmic Ray Conference (ICRC), held on July 12-23, 2021 (online) in Berlin, Germany.
Contribution of Secondary Neutrinos from Line-of-sight Cosmic Ray Interactions to the IceCube Diffuse Astrophysical Flux
Alina Kochocki, Volodymyr Takhistov, Alexander Kusenko +1
In ten years of observations, the IceCube neutrino observatory has revealed a neutrino sky in tension with previous expectations for neutrino point source emissions. Astrophysical…
Contributions to the 36th International Cosmic Ray Conference (ICRC 2019) of the JEM-EUSO Collaboration
G. Abdellaoui, S. Abe, J. H. Adams +309
Compilation of papers presented by the JEM-EUSO Collaboration at the 36th International Cosmic Ray Conference (ICRC), held July 24 through August 1, 2019 in Madison, Wisconsin.
Reflections On the Anomalous ANITA Events: The Antarctic Subsurface as a Possible Explanation
Ian M. Shoemaker, Alexander Kusenko, Peter Kuipers Munneke +3
The ANITA balloon experiment was designed to detect radio signals initiated by neutrinos and cosmic ray air showers. These signals are typically discriminated by the polarization a…
Positrons and 511 keV radiation as tracers of recent binary neutron star mergers
George M. Fuller, Alexander Kusenko, David Radice +1
Neutron-rich material ejected from neutron star-neutron star (NS-NS) and neutron star-black hole (NS-BH) binary mergers is heated by nuclear processes to temperatures of a few hund…
Neutrinos from Choked Jets Accompanied by Type-II Supernovae
Hao-Ning He, Alexander Kusenko, Shigehiro Nagataki +2
The origin of the IceCube neutrinos is still an open question. Upper limits from diffuse gamma-ray observations suggest that the neutrino sources are either distant or hidden from…
Primordial Black Holes and -Process Nucleosynthesis
George M. Fuller, Alexander Kusenko, Volodymyr Takhistov
We show that some or all of the inventory of -process nucleosynthesis can be produced in interactions of primordial black holes (PBHs) with neutron stars (NSs) if PBHs with mass…
A Monte Carlo Bayesian Search for the Plausible Source of the Telescope Array Hotspot
Hao-Ning He, Alexander Kusenko, Shigehiro Nagataki +3
The Telescope Array (TA) collaboration has reported a hotspot of 19 ultrahigh-energy cosmic rays (UHECRs). Using a universal model with one source and energy-dependent magnetic def…
Cosmic Neutrino Pevatrons: A Brand New Pathway to Astronomy, Astrophysics, and Particle Physics
Luis A. Anchordoqui, Vernon Barger, Ilias Cholis +8
The announcement by the IceCube Collaboration of the observation of 28 cosmic neutrino candidates has been greeted with a great deal of justified excitement. The data reported so f…
Understanding the spectrum of a distant blazar PKS 1424+240 and its implications
Warren Essey, Alexander Kusenko
We calculate the gamma-ray spectrum of a distant blazar, PKS 1424+240, located at redshift z > 0.6035, where the optical depth to primary gamma rays of the highest observed energie…
Prospects for future very high-energy gamma-ray sky survey: impact of secondary gamma rays
Yoshiyuki Inoue, Oleg E. Kalashev, Alexander Kusenko
Very high-energy gamma-ray measurements of distant blazars can be well explained by secondary gamma rays emitted by cascades induced by ultra-high-energy cosmic rays. The secondary…
PeV neutrinos from intergalactic interactions of cosmic rays emitted by active galactic nuclei
Oleg E. Kalashev, Alexander Kusenko, Warren Essey
The observed very high energy spectra of distant blazars are well described by secondary gamma rays produced in line-of-sight interactions of cosmic rays with background photons. I…
Cosmic connections: from cosmic rays to gamma rays, to cosmic backgrounds and magnetic fields
Alexander Kusenko
Combined data from gamma-ray telescopes and cosmic-ray detectors have produced some new surprising insights regarding intergalactic and galactic magnetic fields, as well as extraga…
TeV gamma rays from blazars beyond z=1?
Felix Aharonian, Warren Essey, Alexander Kusenko +1
At TeV energies, the gamma-ray horizon of the universe is limited to redshifts z<<1, and, therefore, any observation of TeV radiation from a source located beyond z=1 would call fo…
Time structure of gamma-ray signals generated in line-of-sight interactions of cosmic rays from distant blazars
Anton Prosekin, Warren Essey, Alexander Kusenko +1
Blazars are expected to produce both gamma rays and cosmic rays. Therefore, observed high-energy gamma rays from distant blazars may contain a significant contribution from seconda…
On weak redshift dependence of gamma-ray spectra of distant blazars
Warren Essey, Alexander Kusenko
Line-of-sight interactions of cosmic rays provide a natural explanation of the hard gamma-ray spectra of distant blazars, which are believed to be capable of producing both gamma r…
A gamma-ray signature of energetic sources of cosmic-ray nuclei
Alexander Kusenko, M. B. Voloshin
Astrophysical sources of nuclei are expected to produce a broad spectrum of isotopes, many of which are unstable. An unstable nucleus can beta-decay outside the source into a singl…
Anisotropy and chemical composition of ultra-high energy cosmic rays using arrival directions measured by the Pierre Auger Observatory
The Pierre Auger Collaboration, P. Abreu, M. Aglietta +490
The Pierre Auger Collaboration has reported evidence for anisotropy in the distribution of arrival directions of the cosmic rays with energies eV. Thes…
Determination of intergalactic magnetic fields from gamma ray data
Warren Essey, Shin'ichiro Ando, Alexander Kusenko
We report a measurement of intergalactic magnetic fields using combined data from Atmospheric Cherenkov Telescopes and Fermi Gamma-Ray Space Telescope, based on the spectral data a…
Role of line-of-sight cosmic ray interactions in forming the spectra of distant blazars in TeV gamma rays and high-energy neutrinos
Warren Essey, Oleg Kalashev, Alexander Kusenko +1
Active galactic nuclei (AGN) can produce both gamma rays and cosmic rays. The observed high-energy gamma-ray signals from distant blazars may be dominated by secondary gamma rays p…