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  • Inorganic Chemistry  (720)
  • Fisheries
  • SOLAR PHYSICS
  • 1990-1994
  • 1975-1979  (934)
  • 1979  (934)
Collection
Keywords
Publisher
Years
  • 1990-1994
  • 1975-1979  (934)
Year
  • 1
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    Numerical modeling of stimulation of induced magnetosphere during interaction of solar wind with the ionosphere of Venus (1979)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: Electrodynamic processes in the ionopause are examined as well as the structure of the induced magnetosphere.
    Keywords: SOLAR PHYSICS
    Type: NASA-TM-75921 , PR-351
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    A broad look at solar physics adapted from the solar physics study of August 1975 (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: The current status of our knowledge of the basic mechanisms involved in fundamental solar phenomena is reviewed. These include mechanisms responsible for heating the corona, the generation of the solar wind, the particle acceleration in flares, and the dissipation of magnetic energy in field reversal regions, known as current sheets. The discussion covers solar flares and high-energy phenomena, solar active regions; solar interior, convection, and activity; the structure and energetics of the quiet solar atmosphere; the structure of the corona; the solar composition; and solar terrestrial interactions. It also covers a program of solar research, including the special observational requirements for spectral and angular resolution, sensitivity, time resolution, and duration of the techniques employed.
    Keywords: SOLAR PHYSICS
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Solar wind and magnetosphere interactions (1979)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: The relationship between the magnetosphere and the solar wind is addressed. It is noted that this interface determines how much of the solar plasma and field energy is transferred to the Earth's environment, and that this coupling not only varies in time, responding to major solar disturbances, but also to small changes in solar wind conditions and interplanetary field directions. It is recommended that the conditions of the solar wind and interplanetary medium be continuously monitored, as well as the state of the magnetosphere. Other recommendations include further study of the geomagnetic tail, tests of Pc 3,4 magnetic pulsations as diagnostics of the solar wind, and tests of kilometric radiation as a remote monitor of the auroral electrojet.
    Keywords: SOLAR PHYSICS
    Type: NASA. Marshall Space Flight Center Solar-Terrest. Predictions Proc., Vol. 2; p 346-364
    Format: text
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  • 4
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    The mechanism of temperature and pressure changes in the Earth's atmosphere during solar flares (1979)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: The effect of solar flares on the weather on Earth is examined. It is concluded that the processes which arise in the atmosphere are so intricate that a single calculation of solar activity is insufficient for long-range forecasting. However, combined consideration of processes dependent upon the dynamic instability of the atmosphere and the effect of solar activity will contribute to the improvement of long-range forecasts.
    Keywords: SOLAR PHYSICS
    Type: NASA-TM-75349 , All-Union Conf. on Sun Atmosphere Relations in Climate Theory and Weather Forecasts; Oct 30, 1972 - Nov 01, 1972; Moscow
    Format: application/pdf
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  • 5
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    A theory of solar type III radio bursts (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: A theory of type III bursts is reviewed. Energetic electrons propagating through the interplanetary medium are shown to excite the one dimensional oscillating two stream instability (OTSI). The OTSI is in turn stabilized by anomalous resistivity which completes the transfer of long wavelength Langmuir waves to short wavelengths, out of resonance with the electrons. The theory explains the small energy losses suffered by the electrons in propagating to 1 AU, the predominance of second harmonic radiation, and the observed correlation between radio and electron fluxes.
    Keywords: SOLAR PHYSICS
    Type: Wave instabilities in space plasmas; Jul 31, 1978 - Aug 08, 1978; Helsinki; Finland
    Format: text
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  • 6
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    Rocket studies of solar corona and transition region (1979)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The XSST (X-Ray Spectrometer/Spectrograph Telescope) rocket payload launched by a Nike Boosted Black Brant was designed to provide high spectral resolution coronal soft X-ray line information on a spectrographic plate, as well as time resolved photo-electric records of pre-selected lines and spectral regions. This spectral data is obtained from a 1 x 10 arc second solar region defined by the paraboloidal telescope of the XSST. The transition region camera provided full disc images in selected spectral intervals originating in lower temperature zones than the emitting regions accessible to the XSST. A H-alpha camera system allowed referencing the measurements to the chromospheric temperatures and altitudes. Payload flight and recovery information is provided along with X-ray photoelectric and UV flight data, transition camera results and a summary of the anomalies encountered. Instrument mechanical stability and spectrometer pointing direction are also examined.
    Keywords: SOLAR PHYSICS
    Type: NASA-CR-160001
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 7
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    Empirical studies of solar flares: Comparison of X-ray and H alpha filtergrams and analysis of the energy balance of the X-ray plasma (1979)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The physics of solar flares was investigated through a combined analysis of X-ray filtergrams of the high temperature coronal component of flares and H alpha filtergrams of the low temperature chromospheric component. The data were used to study the magnetic field configuration and its changes in solar flares, and to examine the chromospheric location and structure of X-ray bright points (XPB) and XPB flares. Each topic and the germane data are discussed. The energy balance of the thermal X-ray plasma in flares, while not studied, is addressed.
    Keywords: SOLAR PHYSICS
    Type: NASA-CR-161405
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 8
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    Formation, support and stability of quiescent prominences (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The most prevalent hypotheses and theories that treat the formation and support of quiescent prominences are reviewed, along with current ideas concerning the stability of such prominences. Observational clues to the formation of quiescent prominences are described, condensation of coronal material is examined, and injection mechanisms of prominence formation are considered. Questions pertaining to the support and stability of quiescent prominences are discussed in terms of magnetohydrostatic equilibrium, prominence equilibria, and breakdown of stability conditions.
    Keywords: SOLAR PHYSICS
    Type: Physics of solar prominences; Colloquium; Aug 14, 1978 - Aug 18, 1978; Oslo; Norway
    Format: text
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    NASA TECHNICAL REPORTS
  • 9
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    Energetic particles in solar flares (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The principal properties of energetic particles accelerated in solar flares are reviewed. Particular emphasis is placed on the high-energy flare component whose acceleration is often referred to as second-phase acceleration. Stochastic Fermi acceleration is treated analytically, and the results of the computation are compared with particle and gamma-ray data to deduce information on the timing of the acceleration, the spectrum of the particles, and the energy content of the nucleonic component. A discussion of He-3 and heavy element abundances is also presented.
    Keywords: SOLAR PHYSICS
    Type: Particle acceleration mechanisms in astrophysics; Jan 03, 1979 - Jan 05, 1979; La Jolla, CA
    Format: text
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  • 10
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    Observations of particle acceleration in solar flares (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Solar flares provide several examples of nonthermal particle acceleration. The paper reviews the information gained about these processes via X-ray and gamma-ray astronomy, which can presently distinguish among three separate particle-acceleration processes at the sun: an impulsive accelerator of more than 20 keV electrons, a gradual accelerator of more than 20 keV electrons, and a gradual accelerator of more than 10 MeV ions. The acceleration energy efficiency (total particle energy divided by total flare energy) of any of these mechanisms cannot be less than about 0.1%, although the gradual acceleration does not occur in every flare. The observational material suggests that both the impulsive and gradual accelerations take place preferentially in closed magnetic-field structures, but that the electrons decay in these traps before they can escape. The ions escape very efficiently.
    Keywords: SOLAR PHYSICS
    Type: Particle acceleration mechanisms in astrophysics; Jan 03, 1979 - Jan 05, 1979; La Jolla, CA
    Format: text
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