High-energy neutrino yields from astrophysical sources:: Weakly magnetized sources

被引：53

作者：

Kachelriess, M. ^{[1
]}

Tomas, R.

机构：

[1] NTNU, Inst Fys, N-7491 Trondheim, Norway

[2] Univ Valencia, AHEP Grp, Inst Fis Corpuscular, CSIC, E-46071 Valencia, Spain

来源：

PHYSICAL REVIEW D | 2006年 / 74卷 / 06期

关键词：

D O I：

10.1103/PhysRevD.74.063009

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We calculate the yield of high-energy neutrinos produced in astrophysical sources with negligible magnetic fields varying their interaction depth from nearly transparent to opaque. We take into account the scattering of secondaries on background photons as well as the direct production of neutrinos in decays of charm mesons. If multiple scattering of nucleons becomes important, the neutrino spectra from meson and muon decays are strongly modified with respect to transparent sources. Characteristic for neutrino sources containing photons as scattering targets is a strong energy-dependence of the ratio R-0 of nu(mu) and nu(e) fluxes at the sources, ranging from R-0=phi(mu)/phi(e)similar to 0 below threshold to R-0 similar to 4 close to the energy where the decay length of charged pions and kaons equals their interaction length on target photons. Above this energy, the neutrino flux is strongly suppressed and depends mainly on charm production.

引用

页数：11

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