NDLI: Frequency Distributions of Microwave Pulses for the 18 March 2003 Solar Flare

Content Provider	Springer Nature Link
Author	Ning, Zongjun Wu, H. Xu, F. Meng, X.
Copyright Year	2007
Abstract	We analyze the pulses in high-frequency drift radio structures observed by the spectrometer at Purple Mountain Observatory (PMO) over the frequency range of 4.5 – 7.5 GHz during the 18 March 2003 solar flare. A number of individual pulses are determined from the drifting radio structures after the detected gradual component subtraction. The frequency distributions of microwave pulse occurrence as functions of peak flux, duration, bandwidth, and time interval between two adjacent pulses exhibit a power-law behavior, i.e. $\mathrm{d}N/\mathrm{d}x\propto x^{-\alpha _{x}}$ . From regression fitting in log-log space, we obtain the power-law indexes, α $_{P}$=7.38±0.40 for the peak flux, α $_{D}$=5.39±0.86 for the duration, and α $_{B}$=6.35±0.56 for the bandwidth. We find that the frequency distribution for the time interval displays a broken power law. The break occurs at about 500 ms, and their indexes are α $_{ W1}$=1.56±0.08 and α $_{ W2}$=3.19±0.12, respectively. Our results are consistent with the previous findings of hard X-ray pulses, type III bursts, and decimetric millisecond spikes.
Starting Page	101
Ending Page	109
Page Count	9
File Format	PDF
ISSN	00380938
Journal	Solar Physics
Volume Number	242
Issue Number	1-2
e-ISSN	1573093X
Language	English
Publisher	Springer Netherlands
Publisher Date	2007-06-01
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Flares Radio radiation Astronomy Extraterrestrial Physics, Space Sciences Astrophysics
Content Type	Text
Resource Type	Article
Subject	Astronomy and Astrophysics Space and Planetary Science

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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