Abstract
The sources of ultrahigh energy cosmic rays (UHECRs, E >1018 eV) are still unknown, mainly due to the loss of the direction to the source after the deflection of cosmic rays’ (CRs) trajectories in the galactic and extragalactic magnetic fields. With the increase in CR energy (rigidity), the influence of the magnetic field weakens; therefore, the most promising approach is to search for the sources of events with the highest energy. In our work, we expand the existing UHECR (E > 1020 eV) sample from 33 to 42 events by calibrating the AUGER events. The sample is characterized by the presence of an event triplet in a circle of radius 3°. The highest-energy event is still the shower (E = 3.2 × 1020 eV) detected with the Fly’s Eye fluorescent detector (FE-event) in 1993. The possible sources of the triplet and the FE-event are analyzed. Taking into account the deflection of CR trajectories in the extragalactic and galactic magnetic fields, it is shown that transient sources of the FE-event and the triplet may be galaxies with active star formation, where CRs are accelerated by newborn millisecond pulsars. Among the galactic sources, the potential candidates are young pulsars that might have had millisecond periods at birth and giant magnetar flares.
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References
A. Aab, P. Abreu, M. Aglietta, et al., “Searches for large-scale anisotropy in the arrival directions of cosmic rays detected above energy of 1019 eV at the Pierre Auger Observatory and the Telescope Array,” Astrophys. J. 794, 172 (2014).
A. Aab, P. Abreu, M. Aglietta, et al., “Searches for anisotropies in the arrival directions of the highest energy cosmic rays detected by the Pierre Auger Observatory,” Astrophys. J. 804, 15 (2015).
R. U. Abbasi, M. Abe, T. Abu-Zayyad, et al., “Indications of intermediate-scale anisotropy of cosmic rays with energy greater than 57 EeV in the northern sky measured with the surface detector of the Telescope Array experiment,” Astrophys. J. Lett. 790, L21 (2014).
R. U. Abbasi, M. Abe, T. Abu-Zayyad, et al., “Study of ultra-high energy cosmic ray composition using Telescope Array’s middle drum detector and surface array in hybrid mode,” Astropart. Phys. 64, 49–62 (2015).
R. Abbasi, J. Bellido, J. Belz, et al., “Report of the working group on the composition of ultra high energy cosmic rays,” arXiv:1503.07540[astro-ph.HE] (2015).
T. Abu-Zayyad, R. Aida, M. Allen, et al., “Energy spectrum of ultra-high energy cosmic rays observed with the Telescope Array using a hybrid technique,” Astropart. Phys. 61, 93–101 (2015).
D. Allard, “Extragalactic propagation of ultrahigh energy cosmic-rays,” Astropart. Phys. 39–40, 33–43 (2012).
R. Aloisio, V. Berezinsky, P. Blasi, et al., “A dip in the UHECR spectrum and the transition from galactic to extragalactic cosmic rays,” Astropart. Phys. 27, 76–91 (2007).
R. Aloisio, V. Berezinsky, and P. Blasi, “Ultra high energy cosmic rays: implications of Auger data for source spectra and chemical composition,” J. Cosmol. Astropart. Phys., No. 10, 020 (2014).
V. S. Berezinsky, S. I. Grigorieva, and B. I. Hnatyk, “Extragalactic UHE proton spectrum and prediction for iron-nuclei flux at 108–109 GeV,” Astropart. Phys. 21, 617–625 (2004).
D. J. Bird, S. C. Corbato, H. Y. Dai, et al., “Detection of a cosmic ray with measured energy well beyond the expected spectral cutoff due to cosmic microwave radiation,” Astrophys. J. 441 (1), 144–150 (1995).
R. C. Duncan and C. Thompson, “Formation of very strongly magnetized neutron stars–Implications for gamma-ray bursts,” Astrophys. J. 392 (1), L9–L13 (1992).
R. Durrer and A. Neronov, “Cosmological magnetic fields: their generation, evolution and observation,” Astron. Astrophys. Rev. 21, 62 (2013).
D. Eichler, “Ultrahigh energy activity in giant magnetar outbursts,” arXiv:astro-ph/0504452 (2005).
A. A. Elyiv, I. D. Karachentsev, V. E. Karachentseva, et al., “Low-density structures in the Local Universe. II. Nearby cosmic voids,” Astrophys. Bull. 68, 1–13 (2013).
A. Etchegoyen, “Science and detectors of the Pierre Auger Observatory,” arXiv:1004.2635[astro-ph.IM] (2010).
K. Fang, K. Kotera, K. Murase, et al., “Testing the newborn pulsar origin of ultrahigh energy cosmic rays with EeV neutrinos,” Phys. Rev. D: Part. Fields 90, 103005 (2014).
G. R. Farrar and T. Piran, “Tidal disruption jets as the source of ultra-high energy cosmic rays,” arXiv:1411.0704[astro-ph.HE] (2014).
G. Ferrand and S. Safi-Harb, “A census of high-energy observations of Galactic supernova remnants,” Adv. Space Res. 49, 1313–1319 (2012).
M. Fukushima, “Recent results from Telescope Array,” arXiv:1503.06961[astro-ph.HE] (2015).
F. Halzen, R. A. Vázquez, T. Stanev, et al., “The highest energy cosmic ray,” Astropart. Phys. 3, 151–156 (1995).
H. He, A. Kusenko, S. Nagataki, et al., “The possible extragalactic source of ultra-high-energy cosmic rays at the telescope array hotspot” arXiv:1411.5273v1[astro-ph.HE] (2014).
R. Jansson and G. R. Farrar, “The galactic magnetic field,” Astrophys. J. Lett. 761, L11 (2012).
R. Jansson and G. R. Farrar, “A new model of the Galactic magnetic field,” Astrophys. J. 757, 14 (2012).
K. Kotera and A. V. Olinto, “The astrophysics of ultrahigh energy cosmic rays,” Annu. Rev. Astron. Astrophys. 49, 119–153 (2011).
D. Kuempel, “Extragalactic propagation of ultra-high energy cosmic rays,” arXiv:1409.3129v2[astro-ph.HE] (2014).
M. Lemoine, K. Kotera, and J. Petri, “On ultra-high energy cosmic ray acceleration at the termination shock of young pulsar winds” arXiv:1409.0159v1[astro-ph.HE] (2014).
M. Lemoine and E. Waxman, “Anisotropy vs chemical composition at ultra-high energies,” J. Cosmol. Astropart. Phys., No. 11, 009 (2009).
X.-W. Liu, X.-F. Wu, and T. Lu, “Diffuse high energy neutrinos and cosmic rays from hyper-flares of softgamma repeaters,” New Astron. 15, 292–296 (2010).
R. N. Manchester, G. B. Hobbs, A. Teoh, et al., “The Australia Telescope National Facility Pulsar Catalogue,” Astron. J. 129, 1993–2006 (2005).
R. Moharana and S. Razzaque, “Angular correlation of cosmic neutrinos with ultrahigh-energy cosmic rays and implications for their sources,” arXiv:1501.0518v1[astro-ph.HE] (2015).
S. A. Olausen and V. M. Kaspi, “The McGill Magnetar Catalog,” Astrophys. J., Suppl. Ser. 212, 6 (2014).
H. Ritter and U. Kolb, “Catalogue of cataclysmic binaries, low-mass X-ray binaries and related objects (Seventh edition),” Astron. Astrophys. 404, 301–303 (2003).
P. Sokolsky, “Recent results from TA,” in Report on JSI Workshop 2014 Multimessenger Astronomy in the Era of PeV neutrinos, Annapolis, USA, December, 2014 (JSI, 2014).
H. Takami, K. Murase, and C. D. Dermer, “Isotropy constraints on powerful sources of ultrahigh-energy cosmic rays at 1019 eV,” arXiv:1412.4716v2[astro-ph.HE] (2014).
S. V. Troitsky, “Doublet of cosmic-ray events with primary energies >1020 eV,” J. Exper. Theor. Phys. Lett. 96, 13–16 (2012).
R. B. Tully and J. R. Fisher, Nearby Galaxies Atlas (Cambridge Univ. Press, Cambridge, 1987).
M. Wenger, F. Ochsenbein, D. Egret, et al., “The SIMBAD astronomical database. The CDS reference database for astronomical objects,” Astron. Astrophys., Suppl. Ser. 143, 9–22 (2000).
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Original Russian Text © R.B. Gnatyk, 2016, published in Kinematika i Fizika Nebesnykh Tel, 2016, Vol. 32, No. 1, pp. 3–20.
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Gnatyk, R.B. Search for the sources of cosmic rays with energies above 1020 eV. Kinemat. Phys. Celest. Bodies 32, 1–12 (2016). https://doi.org/10.3103/S0884591316010037
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DOI: https://doi.org/10.3103/S0884591316010037