Are starburst galaxies a common source of high energy neutrinos and cosmic rays?. (arXiv:1902.09663v1 [astro-ph.HE])
<a href="http://arxiv.org/find/astro-ph/1/au:+Lunardini_C/0/1/0/all/0/1">Cecilia Lunardini</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Vance_G/0/1/0/all/0/1">Gregory S. Vance</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Emig_K/0/1/0/all/0/1">Kimberly L. Emig</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Windhorst_R/0/1/0/all/0/1">Rogier A. Windhorst</a>
A recent analysis of cosmic ray air showers observed at the Pierre Auger
Observatory indicates that nearby starburst galaxies (SBGs) might be the cause
of ~ 10% of the Ultra-High-Energy Cosmic Ray flux at energies E > 39 EeV. Since
high energy neutrinos are a direct product of cosmic ray interactions, we
investigate SBGs as a possible source of some of the 0.1-1 PeV neutrinos
observed at IceCube. A statistical analysis is performed to establish the
degree of positional correlation between the observed neutrinos and a set of
nearby, radio- and infrared-bright SBGs. Our results are consistent with no
causal correlation. However, a scenario where ~ 10% of the neutrino data are
coming from the candidate SBGs is not excluded. The same conclusion is reached
for two different IceCube data sets (and their subsets, including shower-like
and track-like events), as well as two different subsets of SBGs motivated by
the Pierre Auger Observatory analysis.
A recent analysis of cosmic ray air showers observed at the Pierre Auger
Observatory indicates that nearby starburst galaxies (SBGs) might be the cause
of ~ 10% of the Ultra-High-Energy Cosmic Ray flux at energies E > 39 EeV. Since
high energy neutrinos are a direct product of cosmic ray interactions, we
investigate SBGs as a possible source of some of the 0.1-1 PeV neutrinos
observed at IceCube. A statistical analysis is performed to establish the
degree of positional correlation between the observed neutrinos and a set of
nearby, radio- and infrared-bright SBGs. Our results are consistent with no
causal correlation. However, a scenario where ~ 10% of the neutrino data are
coming from the candidate SBGs is not excluded. The same conclusion is reached
for two different IceCube data sets (and their subsets, including shower-like
and track-like events), as well as two different subsets of SBGs motivated by
the Pierre Auger Observatory analysis.
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