Details

Autor(en) / Beteiligte

• Aglietta, M.
• Allekotte, I.
• Andrada, B.
• Barbato, F.
• Luz, R. J. Barreira
• Bellido, J. A.
• Bertaina, M. E.
• Biermann, P. L.
• Brack, J.
• Briechle, F. L.
• Buitink, S.
• Buscemi, M.
• Caballero-Mora, K. S.
• Chytka, L.
• Clay, R. W.
• Colalillo, R.
• Conceição, R.
• Dawson, B. R.
• Mauro, G. De
• Neto, J. R. T. de Mello
• Mitri, I. De
• Debatin, J.
• Deligny, O.
• Dobrigkeit, C.
• Anjos, R. C. dos
• Dundovic, A.
• Ebr, J.
• Erdmann, M.
• Etchegoyen, A.
• Farrar, G.
• Fauth, A. C.
• Fazzini, N.
• Figueira, J. M.
• Gemmeke, H.
• Gherghel-Lascu, A.
• Giaccari, U.
• Giller, M.
• Golup, G.
• González, N.
• Goos, I.
• Hampel, M. R.
• Hansen, P.
• Harvey, V. M.
• Hebbeker, T.
• Hojvat, C.
• Jandt, I.
• Kääpä, A.
• Kampert, K. H.
• Klages, H. O.
• Kleifges, M.
• Awad, A. Kuotb
• Lago, B. L.
• LaHurd, D.
• Legumina, R.
• Lorek, R.
• Mari, I. C.
• Martello, D.
• Martinez, H.
• Martínez Bravo, O.
• Mitrica, B.
• Mostafá, M.
• Muller, M. A.
• Nellen, L.
• Nucita, A
• Pallotta, J.
• Pech, M.
• Pelayo, R.
• Perlin, M.
• Perrone, L.
• Pont, B.
• Prado, R. R.
• Ramos-Pollan, R.
• Riehn, F.
• Ristori, P.
• de Carvalho, W. Rodrigues
• Rovero, A. C.
• Saftoiu, A.
• Salamida, F.
• Santos, E.
• Savina, P.
• Scherini, V.
• Schieler, H.
• Schimp, M.
• Schmidt, D.
• Schovánek, P.
• Schröder, S.
• Schumacher, J.
• Silli, G.
• Sima, O.
• Stanca, D.
• Stasielak, J.
• Suarez, F.
• Šupík, J.
• Szadkowski, Z.
• Elipe, G. Torralba
• Varela, E.
• Quispe, I. D. Vergara
• Weber, M.
• Wilczy ski, H.
• Wirtz, M.

Titel

Large-scale Cosmic-Ray Anisotropies above 4 EeV Measured by the Pierre Auger Observatory

Ist Teil von

• The Astrophysical journal, 2018-11, Vol.868 (1), p.4

Ort / Verlag

Philadelphia: The American Astronomical Society

Erscheinungsjahr

2018

Link zum Volltext

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• We present a detailed study of the large-scale anisotropies of cosmic rays with energies above 4 EeV measured using the Pierre Auger Observatory. For the energy bins [4, 8] EeV and E ≥ 8 EeV, the most significant signal is a dipolar modulation in R.A. at energies above 8 EeV, as previously reported. In this paper we further scrutinize the highest-energy bin by splitting it into three energy ranges. We find that the amplitude of the dipole increases with energy above 4 EeV. The growth can be fitted with a power law with index β = 0.79 0.19. The directions of the dipoles are consistent with an extragalactic origin of these anisotropies at all the energies considered. Additionally, we have estimated the quadrupolar components of the anisotropy: they are not statistically significant. We discuss the results in the context of the predictions from different models for the distribution of ultrahigh-energy sources and cosmic magnetic fields.