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1.
Gravitational wave signal from primordial magnetic fields in the Pulsar Timing Array frequency band / Roper Pol, Alberto (APC, Paris) ; Caprini, Chiara (Geneva U., Dept. Theor. Phys. ; CERN) ; Neronov, Andrii (APC, Paris ; LASTRO Observ.) ; Semikoz, Dmitri (APC, Paris ; Moscow, INR ; Moscow Phys. Eng. Inst.)
The NANOGrav, Parkes, European, and International Pulsar Timing Array (PTA) Collaborations have reported evidence for a common-spectrum process that can potentially correspond to a stochastic gravitational wave background (SGWB) in the 1--100 nHz frequency range. We consider the scenario in which this signal is produced by magnetohydrodynamic (MHD) turbulence in the early Universe, induced by a nonhelical primordial magnetic field at the energy scale corresponding to the quark confinement phase transition. [...]
arXiv:2201.05630.- 2022-06-01 - 28 p. - Published in : Phys. Rev. D 105 (2022) 123502 Fulltext: PDF;
2.
Account of the baryonic feedback effect in γ-ray measurements of intergalactic magnetic fields / Bondarenko, Kyrylo (CERN ; Ecole Polytechnique, Lausanne) ; Boyarsky, Alexey (Leiden U.) ; Korochkin, Alexander (APC, Paris ; Moscow, INR ; Novosibirsk State U.) ; Neronov, Andrii (APC, Paris ; U. Geneva (main)) ; Semikoz, Dmitri (APC, Paris ; Moscow, INR ; Moscow Phys. Eng. Inst.) ; Sokolenko, Anastasia (OAW, Vienna)
Intergalactic magnetic fields in the voids of the large-scale structure can be probed via measurements of secondary gamma-ray emission from gamma-ray interactions with extragalactic background light. Lower bounds on the magnetic field in the voids were derived from the non-detection of this emission. [...]
arXiv:2106.02690.- 2022-04-01 - 8 p. - Published in : Astron. Astrophys. 660 (2022) A80 Fulltext: PDF;
3.
A self-consistent model for the Galactic cosmic ray, antiproton and positron spectra / Semikoz, Dmitri (speaker) (APC - Paris Diderot)
In this talk I will present the escape model of Galactic cosmic rays. This model explains the measured cosmic ray spectra of individual groups of nuclei from TeV to EeV energies. [...]
2015 - 4432. TH Theoretical Seminar External link: Event details In : A self-consistent model for the Galactic cosmic ray, antiproton and positron spectra

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