Журнал Экспериментальной и Теоретической Физики
НАЧАЛО | ПОИСК | ДЛЯ АВТОРОВ | ПОМОЩЬ      e
Общая информация о журнале
Золотые страницы
Адреса редакции
Содержание журнала
Сообщения редакции
Правила для авторов
Загрузить статью
Проверить статус статьи


ЖЭТФ, Том 147, Вып. 3, стр. 605 (Март 2015)
(Английский перевод - JETP, Vol. 120, No 3, March 2015 доступен on-line на www.springer.com )

FULL SKY HARMONIC ANALYSIS HINTS AT LARGE ULTRA-HIGH ENERGY COSMIC RAY DEFLECTIONS
Tinyakov P.G., Urban F.R.

Поступила в редакцию: 24 Октября 2014

DOI: 10.7868/S0044451015030210

DJVU (154.1K) PDF (345.3K)

The full-sky multipole coefficients of the ultra-high energy cosmic ray (UHECR) flux have been measured for the first time by the Pierre Auger and Telescope Array collaborations using a joint data set with E>10 EeV. We calculate these harmonic coefficients in the model where UHECR are protons and sources trace the local matter distribution, and compare our results with observations. We find that the expected power for low multipoles (dipole and quadrupole, in particular) is sytematically higher than in the data: the observed flux is too isotropic. We then investigate to which degree our predictions are influenced by UHECR deflections in the regular Galactic magnetic field. It turns out that the UHECR power spectrum coefficients C_\ell are quite insensitive to the effects of the Galactic magnetic field, so it is unlikely that the discordance can be reconciled by tuning the Galactic magnetic field model. On the contrary, a sizeable fraction of uniformly distributed flux (representing for instance an admixture of heavy nuclei with considerably larger deflections) can bring simulations and observations to an accord. Contribution for the JETP special issue in honor of V. A. Rubakov's 60th birthday

 
Сообщить о технических проблемах