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  • 1
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    Relationship of interplanetary parameters and occurrence of magnetospheric substorms (1971)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: Magnetospheric substorms relationship to interplanetary magnetic field and solar wind plasma parameters, noting dominant effect of interplanetary southward component
    Keywords: SPACE SCIENCES
    Type: ; 331-335. (
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  • 2
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    Electron capture in carbon dwarf supernovae (1974)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: The rates of electron capture on heavier elements under the extreme conditions predicted for dwarf star supernovae have been computed, incorporating modifications that seem to be indicated by present experimental results. An estimate of the maximum possible value of such rates is also given. The distribution of nuclei in nuclear statistical equilibrium has been calculated for the range of expected supernovae conditions, including the effects of the temperature dependence of nuclear partition functions. These nuclide abundance distributions are then used to compute nuclear equilibrium thermodynamic properties. The effects of the electron capture on such equilibrium matter are discussed. In the context of the 'carbon detonation' supernova model, the dwarf central density required to ensure core collapse to a neutron star configuration is found to be slightly higher than that obtained by Bruenn (1972) with the electron capture rates of Hansen (1966).-
    Keywords: SPACE SCIENCES
    Type: Astrophysics and Space Science; 27; Apr. 197
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  • 3
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    Binary helium dwarf supernovae (1973)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: The possibility of helium dwarf evolution to sufficiently high densities for violent helium ignition in low-massed binary systems is investigated. During accretional evolution the occurrence of thermonuclear runaway is found to be probable when the dwarf's mass approaches 1 solar mass, and steady-state discontinuous wave propagation considerations indicate that the dwarf is totally incinerated (i.e., its total mass burns to nuclear equilibrium) by a detonation wave. A numerical stellar dynamic investigation, including the full effects of nuclear statistical equilibrium and electron capture indicates total disruption for all reasonable dwarf central densities. For consistency with the cosmic element abundances, the conclusion of total disruption requires a low frequency for helium supernova events, implying that helium ignition in mass-exchanging binaries must occur at the lower densities of the relatively mild helium flash.
    Keywords: SPACE SCIENCES
    Type: Astrophysics and Space Science; 23; Aug. 197
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  • 4
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    Lunar Orbiter photo site location (1969)
    In:  Other Sources
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    Publication Date: 2011-08-12
    Description: Data analysis for improved Lunar Orbiter site location
    Keywords: SPACE SCIENCES
    Type: JPL PROC. OF THE SYMP. ON OBS., ANAL., AND SPACE RES. APPL. OF THE LUNAR MOTION 15 APR. 1969; P 1-2
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  • 5
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    The infrared sources in M8. (1973)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: The spectral energy distribution and size of the source of infrared radiation from Herschel 36 in M8 have been investigated. Radiation from the diffuse source in the vicinity of the hourglass has been measured. It is shown that a significant fraction of the 10-microns flux comes from an unresolved source centered on Herschel 36. Other stars in M8 have also been investigated as potential sources of infrared radiation.
    Keywords: SPACE SCIENCES
    Type: Astrophysical Journal; 179; Feb. 1
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  • 6
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    Recent supernova in NGC 5253 and the supernova rate. (1973)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Keywords: SPACE SCIENCES
    Type: Nature Physical Science; 241; Jan. 1
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  • 7
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    SOME GENERAL CONSIDERATIONS OF MANNED LUNAR RETURN MISSIONS (1963)
    In:  Other Sources
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    Publication Date: 2018-12-01
    Description: Manned lunar return mission planning, discussing the utilization of one space vehicle or two for the lunar orbit rendezvous and return phases
    Keywords: SPACE SCIENCES
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  • 8
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    Intercept missions to asteroid Eros in 1974 and comet D'arrest in 1976 (1966)
    In:  CASI
    Details
    Publication Date: 2019-05-30
    Description: Intercept trajectories to asteroid Eros in 1974 and comet De Arrest in 1976
    Keywords: SPACE SCIENCES
    Type: NASA-TM-X-1288
    Format: application/pdf
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  • 9
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    Absorption of trapped particles by Jupiter's moons (1973)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Absorption effects of the four innermost moons in the radial transport equations for electrons and protons in Jupiter's magnetosphere are presented. The phase space density n at 2 R sub J for electrons with equatorial pitch angles less than 69 deg is reduced by a factor of 4.2 x 1000 when lunar absorption is included in the calculation. For protons with equatorial pitch angles less than 69 deg, the corresponding reduction factor is 3.2 x 100000. The effect of the satellites becomes progressively weaker for both electrons and protons as equatorial pitch angles of pi/2 are approached, because the likelihood of impacting a satellite becomes progressively smaller. The large density decreases which we find at the orbits of Io, Europa, and Ganymede result in corresponding particle flux decreases that should be observed by spacecraft making particle measurements in Jupiter's magnetosphere. The characteristic signature of satellite absorption should be a downward pointing cusp in the flux versus radius curve at the L-value corresponding to each satellite.
    Keywords: SPACE SCIENCES
    Type: NASA-TM-X-70522 , X-641-73-362
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  • 10
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    Jupiter's radiation belts: Can Pioneer 10 survive? (1973)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Model calculations of Jupiter's electron and proton radiation belts indicate that the Galilean satellites can reduce particle fluxes in certain regions of the inner magnetosphere by as much as six orders of magnitude. Average fluxes should be reduced by a factor of 100 or more along the Pioneer 10 trajectory through the heart of Jupiter's radiation belts in early December. This may be enough to prevent serious radiation damage to the spacecraft.
    Keywords: SPACE SCIENCES
    Type: NASA-TM-X-70516 , X-641-73-347
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