A study on radio-loud interacting/non-interacting CMEs-associated SEPs and solar flares

Kalaivani, P.; Prakash, Om; Feng, Li; Shanmugaraju, A.; Ding, Lei; Lu, Ling; Gan, Weiqun

doi:10.1016/j.asr.2019.01.019

Cited by 3 publications

(2 citation statements)

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Section: Introductionmentioning

confidence: 99%

“…Only half of the events were associated with meter wavelength type III radio bursts. Furthermore, many authors suggested that the ambient suprathermal seed particles from the previous solar flares [54] [12] [16] and from the preceding CMEs [23] [48] [16] [45] [58] can play an important role for producing the large SEP events. When a CME is considerably faster than the local Alfven waves, it is able to produce the magneto hydrodynamic (MHD) shocks propagating outward through the solar atmosphere [55].…”

Section: Introductionmentioning

confidence: 99%

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Statistical Characteristics on SEPs, Radio-Loud CMEs, Low Frequency Type II and Type III Radio Bursts Associated with Impulsive and Gradual Flares

Kalaivani¹,

Shanmugaraju²,

Prakash

et al. 2020

Earth Moon Planets

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We have statistically analyzed a set of 115 low frequency (Deca-Hectometer wavelengths range) type II and type III bursts associated with major Solar Energetic Particle (SEP: E p > 10 MeV) events and their solar causes such as solar flares and coronal mass ejections (CMEs) observed from 1997 to 2014. We classified them into two sets of events based on the duration of the associated solar flares:75 impulsive flares (duration < 60 min) and 40 gradual flares (duration > 60 min).On an average, the peak flux (integrated flux) of impulsive flares X2.9 (0.32 J m −2) is stronger than that of gradual flares M6.8 (0.24 J m −2). We found that impulsive flare-associated CMEs are highly decelerated with larger initial acceleration and they achieved their peak speed at lower heights (-27.66 m s −2 and 14.23 R o) than the gradual flare-associated CMEs (6.26 m s −2 and 15.30 R o), even though both sets of events have similar sky-plane speed (space speed) within LASCO field of view. The impulsive flare-associated SEP events (Rt = 989.23 min: 2.86 days) are

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