Kavli Affiliate: Zhuo Li
| First 5 Authors: Qinyuan Zhang, Tian-Qi Huang, Zhuo Li, ,
| Summary:
Cosmogenic neutrinos (CNs) are produced by ultra-high energy cosmic rays
(UHECRs) interacting with cosmic background radiation. We investigated the
properties of CN point/extended sources, i.e, the neutrino spectrum, and
angular profile as functions of time, by assuming that UHECR sources are
transient events, such as gamma-ray bursts. The properties depend much on the
intergalactic magnetic field (IGMF), but the angular extent is in general
sub-degree, within which the CN flux can overshoot the diffuse CN flux in early
time. The nearby CN point sources could be detected for the low IGMF case by
future neutrino telescopes. The recent KM3-230213A event is possible to account
for by a nearby transient CN source, rather than diffuse CN emission.
Observations of CN point sources will provide a chance to search for UHECR
sources.
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