20.500.12556/RUNG-2160
Large-Scale Distribution of Arrival Directions of Cosmic Rays Detected at the Pierre Auger Observatory and the Telescope Array above 10[sup]19 eV
The large-scale distribution of arrival directions of
high-energy cosmic rays is a key observable in attempts to
understanding their origin. The dipole and quadrupole moments
are of special interest in revealing potential anisotropies.
An unambiguous measurement of these moments as well as
of the full set of spherical harmonic coefficients requires
full-sky coverage. This can be achieved by combining data from
observatories located in both the northern and southern
hemispheres. To this end, a joint analysis using data recorded
at the Pierre Auger Observatory and the Telescope Array above
10[sup]19 eV has been performed. Thanks to the full-sky
coverage, the measurement of the dipole moment reported in
this study does not rely on any assumption on the underlying
flux of cosmic rays. As well, the resolution on the quadrupole
and higher order moments is the best ever obtained. The
resulting multipolar expansion of the flux of cosmic rays
allows a series of anisotropy searches to be performed,
and in particular to report on the first angular power
spectrum of cosmic rays. This allows a comprehensive
description of the angular distribution of cosmic rays
above 10[sup]19 eV.
Pierre Auger Observatory
Telescope Array
high-energy cosmic rays
large-scale anisotropies
angular power spectrum
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Angleški jezik
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2016-03-08 14:57:20
2016-03-08 15:36:35
2023-06-09 03:15:51
0000-00-00 00:00:00
2015
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4158715
URN:SI:UNG:REP:GFD8NQCA
ICRC2015_395.pdf
ICRC2015_395.pdf
1
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de48954bf14bf9fef53ed74ecab267c09c2923132d03b9542e6270b7078959f0
df0a26b8-05cd-11ee-9c48-5ef991fed68f
https://repozitorij.ung.si/Dokument.php?lang=slv&id=3606
Univerza v Novi Gorici
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