The State of Self-Organized Criticality of the Sun During the Last 3 Solar Cycles. I. Observations

Details The State of Self-Organized Criticality of the Sun During the Last 3 Solar Cycles. I. Observations The State of Self-Organized Criticality of the Sun During the Last 3 Solar Cycles. I. Observations

2010-06-24

arxiv.org/abs/1006.4861v3

Solar Physics 274, 99-117 (2011)

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

subm. to Solar Physics

Scientific paper

10.1007/s11207-011-9755-0

We analyze the occurrence frequency distributions of peak fluxes $P$, total fluxes $E$, and durations $T$ of solar flares over the last three solar cycles (during 1980--2010) from hard X-ray data of HXRBS/SMM, BATSE/CGRO, and RHESSI. From the synthesized data we find powerlaw slopes with mean values of $\alpha_P=1.72\pm0.08$ for the peak flux, $\alpha_E=1.60\pm0.14$ for the total flux, and $\alpha_T=1.98\pm0.35$ for flare durations. We find a systematic anti-correlation of the powerlaw slope of peak fluxes as a function of the solar cycle, varying with an approximate sinusoidal variation $\alpha_P(t)=\alpha_0+\Delta \alpha \cos{[2\pi (t-t_0)/T_{cycle}]}$, with a mean of $\alpha_0=1.73$, a variation of $\Delta \alpha =0.14$, a solar cycle period $T_{cycle}=12.6$ yrs, and a cycle minimum time $t_0=1984.1$. The powerlaw slope is flattest during the maximum of a solar cycle, which indicates a higher magnetic complexity of the solar corona that leads to an overproportional rate of powerful flares.

Affiliated with

Also associated with

No associations

Rating

The State of Self-Organized Criticality of the Sun During the Last 3 Solar Cycles. I. Observations does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The State of Self-Organized Criticality of the Sun During the Last 3 Solar Cycles. I. Observations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The State of Self-Organized Criticality of the Sun During the Last 3 Solar Cycles. I. Observations will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-676591