INVESTIGADORES
MOLLERACH Maria Silvia
artículos
Título:
A Targeted Search for Point Sources of EeV Neutrons
Autor/es:
THE PIERRE AUGER COLLABORATION, INCLUYE S. MOLLERACH
Revista:
ASTROPHYSICAL JOURNAL
Editorial:
IOP PUBLISHING LTD
Referencias:
Lugar: Londres; Año: 2014
ISSN:
0004-637X
Resumen:
A flux of neutrons from an astrophysical source in the Galaxy can be
detected in the Pierre Auger Observatory as an excess of cosmic-ray air
showers arriving from the direction of the source. To avoid the
statistical penalty for making many trials, classes of objects are
tested in combinations as nine "target sets," in addition to the search
for a neutron flux from the Galactic center or from the Galactic plane.
Within a target set, each candidate source is weighted in proportion to
its electromagnetic flux, its exposure to the Auger Observatory, and its
flux attenuation factor due to neutron decay. These searches do not find
evidence for a neutron flux from any class of candidate sources.
Tabulated results give the combined p-value for each class, with and
without the weights, and also the flux upper limit for the most
significant candidate source within each class. These limits on fluxes
of neutrons significantly constrain models of EeV proton emission from
non-transient discrete sources in the Galaxy.