SEARCH · Engineering Papers
Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.
Interstellar cosmic ray spectra from nonthermal radio background, obtainig electrons and protons modulation by diffusion-convection energy loss theory
Diffuse background of 2-20 keV X rays over Scorpius to North Galactic Pole sky band by rocket measurements
Soft X ray background galactic absorption and intensity measurements indicating inverse relation to columnar atomic hydrogen density
Lyman alpha sky background measurements by Mariner 6 UV spectrometer
Limit on line emission in X ray background at high galactic latitudes - rocket observation
Cosmic antimatter annihilation and gamma ray background spectrum
Cosmic matter-antimatter annihilation and gamma ray background spectrum
Diffuse galactic X ray background intensity as function of galactic scattering and discrete sources
Extragalactic LF background radiation spectra, using model for free-free absorption in galactic disk
X ray background angular structure comparison with optical galaxies spatial distribution, ruling out universe models with sources following cosmological mass distribution
Coherent light photoelectric detection probability in background light passing through narrow band filter of rectangular or Lorentz frequency characteristics
X ray and far IR measurement inconsistency from Centaurus A, discussing metagalactic submillimeter background
Lyman alpha sky background measurements by OGO 5 satellite, discussing absolute emission rate, spatial variations and origin
Line emission in X ray background in galactic plane and at galactic pole based on rocket flight data
Submillimeter background radiation origin possibility from extragalactic discrete sources based on cosmological models
Line emission in diffuse X ray background at high galactic latitudes, interpreting rocket observations
Following the big-bang baryon symmetric cosmology of Omnes, the redshift was calculated to be on the order of 500-600. It is show that, at these redshifts, annihilation pressure at the boundaries between regions of matter and antimatter drives large scale supersonic turbulence which can trigger galaxy formation. This picture is consistent with the gamma-ray background observations discussed previously. Gravitational binding of galaxies then occurs at a redshift of about 70, at which time vortical turbulent velocities of about 3 x 10 to the 7th power cm/s lead to angular momenta for galaxies comparable with measured values.
The production of ultrahigh energy photons, electrons and neutrinos as the decay products of pions produced in photomeson interactions between cosmic ray nucleons and the blackbody microwave background is discussed in terms of the resultant energy spectra of these particles. Simple asymptotic formulas are given for calculating the ultrahigh energy photon spectrum predicted for the universal cosmic ray hypothesis and the resulting spectra are compared with those obtained previously by numerical means using a different propagation equation for the photons. Approximate analytic solutions for the photon spectra are given in terms of simple power-law energy functions and slowly varying logarithmic functions.