Study of the PeV neutrino, gamma-rays, and UHECRs around the lobes of Centaurus A
Por:
Fraija, N., Aguilar-Ruiz, E., Galvan-Gamez, A., Marinelli, A., de Diego, J. A.
Publicada:
1 dic 2018
Resumen:
Pierre Auger observatory reported the distribution of arrival directions
of the highest energy cosmic rays. These events were collected in 10 yr
of operations with declinations between -90 degrees and +45 degrees. The
IceCube neutrino telescope reported the detection of 82 extraterrestrial
neutrinos in the High-Energy Starting Events catalogue. The
highest-energy neutrino event (IC35) reported in this catalogue had an
energy of 2004(-262)(+236) TeV and its reconstruction was centred at RA
= 208.4 degrees and dec. = -55.8 degrees (J2000). Being Centaurus A the
nearest radio-loud active galactic nucleus and one of the potential
candidates for accelerating cosmic rays up to similar to 10(20) eV, we
show that the ultra-high-energy cosmic rays (UHECRs) around the
direction of Centaurus A (15 degrees radius) could be accelerated inside
the giant lobes. Studying the composition of UHECRs through the
photodisintegration processes, the maximum energy that these can reach
in the giant lobes and the average deflecting angles that nuclei undergo
due to Galactic and extragalactic magnetic fields, it is shown that the
most promise candidates of UHECR composition are light nuclei such as
carbon/nitrogen nuclei. Considering the interactions of the relativistic
carbon nuclei with photon fields (extragalactic background light and
synchrotron) and materials (inside and outside the lobes), we do not
find enough evidence to associate the IC35 event with the UHECRs
reported by Pierre Auger observatory.
Filiaciones:
Fraija, N.:
Instituto de Astronomía, Universidad Nacional Autónoma de México, Circuito Exterior, C.U., A. Postal 70-264, México City, 04510, Mexico
Univ Nacl Autonoma Mexico, Inst Astron, A Postal 70-264, Mexico City 04510, DF, Mexico
Aguilar-Ruiz, E.:
Instituto de Astronomía, Universidad Nacional Autónoma de México, Circuito Exterior, C.U., A. Postal 70-264, México City, 04510, Mexico
Univ Nacl Autonoma Mexico, Inst Astron, A Postal 70-264, Mexico City 04510, DF, Mexico
Galvan-Gamez, A.:
Instituto de Astronomía, Universidad Nacional Autónoma de México, Circuito Exterior, C.U., A. Postal 70-264, México City, 04510, Mexico
Univ Nacl Autonoma Mexico, Inst Astron, A Postal 70-264, Mexico City 04510, DF, Mexico
Marinelli, A.:
I.N.F.N. and Physics Institute Polo Fibonacci, Largo B. Pontecorvo 3, Pisa, I-56127, Italy
Ist Nazl Fis Nucl, Polo Fibonacci Largo B Pontecorvo 3, I-56127 Pisa, Italy
Phys Inst, Polo Fibonacci Largo B Pontecorvo 3, I-56127 Pisa, Italy
de Diego, J. A.:
Instituto de Astronomía, Universidad Nacional Autónoma de México, Circuito Exterior, C.U., A. Postal 70-264, México City, 04510, Mexico
Univ Nacl Autonoma Mexico, Inst Astron, A Postal 70-264, Mexico City 04510, DF, Mexico
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