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  • 1
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    Cosmic rays and the dynamic balance in the Large Magellanic Cloud (1990)
    In:  Other Sources
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    Publication Date: 2011-08-24
    Description: Present and future measurement of the Large Magellanic Cloud (LMC) particularly in the radio and high energy gamma ray range offer the possibility of understanding the density and distribution of the cosmic rays in a galaxy other than our own and the role that they play in galactic dynamic balance. After a study of the consistency of the measurements and interpretation of the synchrotron radiation from our own galaxy, the cosmic ray distribution for the LMC is calculated under the assumption that the cosmic ray nucleon to electron ratio is the same and the relation to the magnetic fields are the same, although the implications of alternatives are discussed. It is seen that the cosmic ray density level appears to be similar to that in our own galaxy, but varying in position in a manner generally consistent with the concept of correlation with the matter on a broad scale.
    Keywords: SPACE RADIATION
    Type: In: Observatories in earth orbit and beyond (A93-23401 07-89); p. 537-541.
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  • 2
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    Cosmic-ray distribution and the dynamic balance in the Large Magellanic Cloud (1991)
    In:  Other Sources
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    Publication Date: 2011-08-19
    Description: The cosmic-ray energy density distribution for the LMC is calculated quantitatively based on the concept of dynamic balance and a scale of coupling between the cosmic rays and matter in a range allowed by present observations. Based on the very slowly varying ratio of the cosmic-ray electron to nucleon energy density ratio with relevant local galactic conditions and the close similarities to the galaxy, the cosmic-ray nucleon density distribution in the LMC is also determined from cosmic-ray electron density distribution deduced from synchrotron radiation measurements in a manner consistent with dynamic balance. It is seen that within uncertainties there is quantitative agreement between the two for a cosmic-ray, matter coupling scale of about 2.5 kiloparsecs both in terms of magnitude and distribution, thus supporting both the concept of dynamic balance and the galactic origin of the bulk of cosmic rays. Future gamma-ray astronomy measurement above 100 MeV will be able to provide a test of this cosmic-ray density distribution for the LMC.
    Keywords: SPACE RADIATION
    Type: Astrophysical Journal, Part 1 (ISSN 0004-637X); 374; 134-141
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  • 3
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    A U-type solar radio burst originating in the outer corona. (1971)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: The observation of a U-type solar radio burst with a reversing frequency of approximately 0.7 MHz suggests the presence of a magnetic bottle extending out to about 35 solar radii. A possible model of this loop structure is developed from the data. The occurrence of low-frequency U-bursts seems to be extremely rare although magnetic bottles may develop frequently during solar maximum.
    Keywords: SPACE RADIATION
    Type: Solar Physics; 20; Oct. 197
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  • 4
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    Search for Jovian hectometric continuum radiation (1970)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: Jovian continuum radiation observation by RAE-1 during lunar occultations
    Keywords: SPACE RADIATION
    Type: ; 5, 6, 8 (
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  • 5
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    Low frequency cosmic noise observations of the constitution of the local system (1970)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: Local system interstellar medium thermal electron distribution, synchrotron radiation emissivity, cosmic ray electron flux and spectrum
    Keywords: SPACE RADIATION
    Type: ; STITUTION OF ENGINEE
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  • 6
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    Large Isotope Spectrometer for Astromag (1990)
    In:  Other Sources
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    Publication Date: 2011-08-24
    Description: The Large Isotope Spectrometer for Astromag (LISA) is an experiment designed to measure the isotopic composition and energy spectra of cosmic rays for elements extending from beryllium through zinc. The overall objectives of this investigation are to study the origin and evolution of galactic matter; the acceleration, transport, and time scales of cosmic rays in the galaxy; and search for heavy antinuclei in the cosmic radiation. To achieve these objectives, the LISA experiment will make the first identifications of individual heavy cosmic ray isotopes in the energy range from about 2.5 to 4 GeV/n where relativistic time dilation effects enhance the abundances of radioactive clocks and where the effects of solar modulation and cross-section variations are minimized. It will extend high resolution measurements of individual element abundances and their energy spectra to energies of nearly 1 TeV/n, and has the potential for discovering heavy anti-nuclei which could not have been formed except in extragalactic sources.
    Keywords: SPACE RADIATION
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  • 7
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    Type III radio bursts in the outer corona. (1969)
    In:  Other Sources
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    Publication Date: 2011-08-12
    Description: Type 3 solar radio bursts observed during April- October 1967 for two alternative models of active region streamers in outer corona
    Keywords: SPACE RADIATION
    Type: ; TROPHYSICAL JOURNAL
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  • 8
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    A density scale for the interplanetary medium from observations of a type II solar radio burst out to 1 astronomical unit. (1973)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Keywords: SPACE RADIATION
    Type: Astrophysical Journal; 183; July 1
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  • 9
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    Radio tracking of solar energetic particles through interplanetary space. (1972)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: Satellite observations of traveling solar radio bursts provide information about the propagation of energetic solar particles through interplanetary space. This information leads to data on the solar wind density and gross magnetic field configuration over distances of 1 AU. By placing a radio telescope well above the ionosphere it is possible to observe the radio emission down to frequencies that correspond to emission at distances of the order of 1 AU. The observations reported provide the first 'radio picture' over 1 AU of the spiral magnetic field configuration in interplanetary space.
    Keywords: SPACE RADIATION
    Type: Science; 178; Nov. 17
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  • 10
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    The 2f/p/ circumterrestrial radio radiation as seen from ISEE 3 (1981)
    In:  Other Sources
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    Publication Date: 2011-08-18
    Description: A narrowband highly spin-modulated radio source has been observed with the radio astronomy experiment on ISEE 3 from a position 0.01 AU upstream of the earth. The source is interpreted as radio line emission generated at twice the local plasma frequency in the vicinity of the earth's bow shock by energetic particles. The bandwidth of the 2f(p) emission varies from less than 3 kHz to more than 20 kHz and is probably broadened by solar wind density variations across the source region. The 2f(p) source is visible about 50% of the time, and the true position of its centroid is usually located within 30 earth radii of the subsolar point, but at times is observed at a distance of up to 60 earth radii. But most of these variations might result from changes in the orientation of the polarization vector in a partially polarized source or from refraction across an electron density front.
    Keywords: SPACE RADIATION
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