首页|Heliospheric Effect on Solar Activity Parameters during Maximum Phase of Solar Cycle 24(2012-2015)

Heliospheric Effect on Solar Activity Parameters during Maximum Phase of Solar Cycle 24(2012-2015)

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The time series of daily data on solar activity proxies,namely the sunspot number(SSN),sunspot area(SSA),solar radio flux(F10.7),modified coronal index(MCI),solar flare index(FI),and cosmic ray intensity(CRI),were analyzed to understand the solar activity modulations and short-term periodicities therein.Rieger-type and other short-term periods include the solar rotational period that covers the maximum activity phase period(maximum phase of solar cycle 24).The wavelet power spectra and Periodogram of SSN,SSA,F10.7,MCI,FI,and CRI exhibited a significant short-term period.The heliospheric effects exist for a particular period(~27 days)and they are related to the solar activity phenomena.The cross-correlation coefficients and time lags between the CRI and solar activity parameters were estimated to be~200,46,281,39,and 47 days for SSN,SSA,F10.7,MCI,and FI respectively during the time series 2012-2015(maximum phase of solar cycle 24).

Sun:activitySun:flaresSun:heliosphereSun:rotation(Sun:)sunspots

P.R.Singh、Upendra Kr.Singh Kushwaha、A.K.Singh、T.K.Pant

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Department of Physics,University of Allahabad,Prayagraj 211003,India

Department of Physics,Banaras Hindu University,Varanasi 221005,India

Space Physics Laboratory,VSSC,Thiruvananthapuram 695022,India

2024

天文和天体物理学研究
中国科学院国家天文台

天文和天体物理学研究

CSTPCD
影响因子:0.406
ISSN:1674-4527
年,卷(期):2024.24(12)