NDLI: Spectral evolution of multiply-impulsive solar bursts. ph.d. thesis - maryland univ.

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Spectral evolution of multiply-impulsive solar bursts. ph.d. thesis - maryland univ.

Content Provider	NASA Technical Reports Server (NTRS)
Author	Frost, K. J. Karpen, J. T. Crannell, C. J.
Copyright Year	1978
Description	Hard X-ray and microwave observations of multiply-impulsive solar bursts, identified in the OSO-5 data were analyzed. Spectra in both frequency ranges were used to determine whether or not the source properties change from peak to peak within individual bursts. Two categories of microwave spectral behavior were identified: those events during which the microwave turnover frequency and spectral shape remain the same from peak to peak, and those during which the turnover frequency and spectral shape change significantly. These categories correspond to two classes of multiply-impulsive bursts: those for which the emission can be characterized by a constant magnetic field and therefore a single source region, in which case the multiplicity may be due to modulation of the emission process; and those in which groups of component spikes appear to originate in regions of different magnetic-field strengths, corresponding to separate source regions which flare sequentially. Examples of the latter type of events are presented. The discrete flaring regions are analyzed and their spatial separations estimated.
File Size	5439586
Page Count	27
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19790005814
Archival Resource Key	ark:/13960/t2b902h8z
Language	English
Publisher Date	1978-11-01
Access Restriction	Open
Subject Keyword	Solar Physics Solar Spectra Solar Activity Solar Flares Spatial Distribution Bremsstrahlung Emission Spectra Spectrum Analysis X Ray Spectra Microwave Spectra Oso-5 Solar Magnetic Field Energetic Particles Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Thesis

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