Constraints on extragalactic point source flux from diffuse neutrino limits
نویسندگان
چکیده
منابع مشابه
Constraints on Extragalactic Point Source Flux from Diffuse Neutrino Limits
We constrain the maximum flux from extragalactic neutrino point sources by using diffuse neutrino flux limits. We show that the maximum flux from extragalactic point sources is E2(dNν/dE) ≤ 5.1× 10 −9 (Lν/10 45 erg/s) GeV cm s from an ensemble of sources with average neutrino luminosity per decade, Lν . It depends only slightly on factors such as the inhomogeneous matter density distribution in...
متن کاملConstraints on GRB TeV Emission from the GeV Extragalactic Diffuse Gamma-Ray Flux
TeV gamma rays emitted by GRBs are converted into electron-positron pairs via interactions with the extragalactic infrared radiation fields. In turn the pairs produced, whose trajectories are randomized by magnetic fields, will inverse Compton scatter off the cosmic microwave background photons. The beamed TeV gamma ray flux from GRBs is thus transformed into a GeV isotropic gamma ray flux, whi...
متن کاملUpper limits on the diffuse supernova neutrino flux from the SuperKamiokande data
We analyze the 1496 days of SuperKamiokande data to put limits on the νe, ν̄e, νμ + ντ and ν̄μ + ν̄τ components of the diffuse flux of supernova neutrinos, in different energy intervals and for different neutrino energy spectra. By considering the presence of only one component at a time, we find the following bounds at 90% C.L. and for neutrino energy E > 19.3 MeV: Φνe < 73.3 − 154 cm−2s−1, Φν̄e <...
متن کاملThe diffuse neutrino flux from the inner Galaxy: constraints from very high energy gamma-ray observations
Recently, the MILAGRO collaboration reported on the detection of a diffuse multiTeV emission from a region of the Galactic disk close to the inner Galaxy. The emission is in excess of what is predicted by conventional models for cosmic ray propagation, which are tuned to reproduce the spectrum of cosmic rays observed locally. By assuming that the excess detected by MILAGRO is of hadronic origin...
متن کاملThe diffuse supernova neutrino flux
I review the status and perspectives of the research on the diffuse flux of (core collapse) supernova neutrinos (DSNνF). In absence of a positive signal, several upper bounds exist in different detection channels. Of these, the strongest is the limit from SuperKamiokande (SK) of 1.2 electron antineutrinos cms at 90% confidence level above 19.3 MeV of neutrino energy. The predictions of the DSNν...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review D
سال: 2010
ISSN: 1550-7998,1550-2368
DOI: 10.1103/physrevd.81.023001