Statistics – Computation
Scientific paper
Jun 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985soph...97..363l&link_type=abstract
Solar Physics (ISSN 0038-0938), vol. 97, June 1985, p. 363-373. SERC-Navy-supported research.
Statistics
Computation
14
Radio Astronomy, Solar Radio Bursts, Amplitude Distribution Analysis, Computational Astrophysics, Pulse Amplitude, Pulse Repetition Rate
Scientific paper
The hypothesis that solar impulsive bursts are comprised of quasi-quantized ultrarapid pulses convoluted with a variable pulse repetition rate R(t) is investigated by comparison of typical observations with numerical simulations. It is found that the ripple amplitude at burst peak increases rapidly with increase in the ratio delta-t/T of pulse separation to pulse width. Consequently pulse widths T are generally much larger than the observed period delta-t of small amplitude ripples. It is also found that, in order to give a ripple amplitude of at least a few percent at burst peak together with reasonable burst rise and fall times without unreasonable ripple amplitude during rise and fall, the individual pulse shape must be sharply peaked but have substantial wings while the repetition rate R(t) must fall gradually away from its peak value cut off rapidly in its wings. As a specific example, a simulation is presented of the fast ripple structures observed in the impulsive 22 GHz burst of Dec. 18, 1980. The relevance of these conclusions to physical modeling is briefly discussed.
Brown John C.
Correia Emilia
Kaufmann Patrik
Loran Jon M.
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