The pionic contribution to diffuse $gamma;-rays: upper limits
نویسندگان
چکیده
منابع مشابه
Contribution of Stellar Flares to the Diffuse Component of Galactic Gamma-Rays
It is well known that diffuse gamma-rays are produced by collisions between Galactic cosmic rays and interstellar matter (Hayakawa−Hutchinson−Morrison hypothesis). We estimate the contribution of high energy protons produced by stellar flares to the diffuse component of Galactic gamma-rays. Each star in the Galaxy regularly produces flares that generate high energy protons in the energy range f...
متن کاملContribution to diffuse gamma-rays in the Galactic center region from unresolved millisecond pulsars
The diffuse gamma-rays in the Galactic center region have been studied. We propose that there exists a population of millisecond pulsars (MSPs) in the Galactic Center, which will emit GeV gamma-rays through the synchrotron-curvature radiation as predicted by outer gap models. These GeV gamma-rays from unresolved millisecond pulsars probably contribute to the diffuse gamma-ray spectrum detected ...
متن کاملDiffuse Continuum Gamma Rays from the Galaxy
We have carried out a new study of the diffuse Galactic γ-ray continuum radiation using a cosmic-ray propagation model which includes nucleons, antiprotons, electrons, positrons, and synchrotron radiation. We show that models based on locally measured electron and nucleon spectra and synchrotron constraints are consistent with γ-ray measurements in the 30 MeV – 500 MeV range, but outside this r...
متن کاملUpper Limits to Fluxes of Neutrinos and Gamma-Rays from Starburst Galaxies
Loeb and Waxman have argued that high energy neutrinos from the decay of pions produced in interactions of cosmic rays with interstellar gas in starburst galaxies would be produced with a large enough flux to be observable. Here we obtain an upper limit to the diffuse neutrino flux from starburst galaxies which is a factor of ∼5 lower than the flux which they predict. Compared with predicted fl...
متن کاملPropagation of Cosmic Rays and Diffuse Galactic Gamma Rays
This paper presents an introduction to the astrophysics of cosmic rays and diffuse γ-rays and discusses some of the puzzles that have emerged recently due to more precise data and improved propagation models: the excesses in Galactic diffuse γ-ray emission, secondary antiprotons and positrons, and the flatter than expected gradient of cosmic rays in the Galaxy. These also involve the dark matte...
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: Astroparticle Physics
سال: 2004
ISSN: 0927-6505
DOI: 10.1016/s0927-6505(04)00071-4