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相关论文: Solar Energetic Particle Events and Associated Typ…

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Metric type II solar radio bursts and solar energetic particles (SEPs) are both associated with shock fronts driven by coronal mass ejections (CMEs) in the solar corona. Recent studies of ground level enhancements (GLEs), regular large…

空间物理 · 物理学 2020-01-29 Pertti Mäkelä , Nat Gopalswamy , Hong Xie , Sachiko Akiyama , Seiji Yashiro , Neeharika Thakur

We investigated the relationship between the spectral structures of type II solar radio bursts in the hectometric and kilometric wavelength ranges and solar energetic particles (SEPs). To examine the statistical relationship between type II…

太阳与恒星天体物理 · 物理学 2020-01-15 Kazumasa Iwai , Seiji Yashiro , Nariaki V. Nitta , Yuki Kubo

A gradual solar energetic particle (SEP) event is thought to happen when particles are accelerated at a shock due to a fast coronal mass ejection (CME). To quantify what kind of solar eruptions can result in such SEP events, we have…

太阳与恒星天体物理 · 物理学 2017-02-10 O. Prakash , Li Feng , G. Michalek , Weiqun Gan , Lei Lu , A. Shanmugaraju , S. Umapathy

We report on further evidence that solar energetic particles are organized by the kinematic properties of coronal mass ejections (CMEs)[1]. In particular, we focus on the starting frequency of type II bursts, which is related to the…

太阳与恒星天体物理 · 物理学 2017-10-11 N Gopalswamy , P Mäkelä , S Yashiro , N Thakur , S Akiyama , H Xie

We report on four large filament eruptions (FEs) from solar cycles 23 and 24 that were associated with large solar energetic particle (SEP) events and interplanetary type II radio bursts. The post-eruption arcades corresponded to mostly…

太阳与恒星天体物理 · 物理学 2015-06-11 N. Gopalswamy , P. Makela , S. Akiyama , S. Yashiro , H. Xie , N. Thakur , S. W. Kahler

Solar Energetic Particles (SEPs) and radio bursts are indicators of particle acceleration on the Sun and in the heliosphere. The accelerated particles have energies significantly higher than thermal particles up to several orders of…

太阳与恒星天体物理 · 物理学 2024-10-14 Nat Gopalswamy

We study solar energetic particle (SEP) events during multiple solar eruptions. The analysed sequences, on 24-26 November 2000, 9-13 April 2001, and 22-25 August 2005, consisted of halo-type coronal mass ejections (CMEs) that originated…

太阳与恒星天体物理 · 物理学 2015-12-16 Silja Pohjolainen , Firas Al-Hamadani , Eino Valtonen

Using the Wind/WAVES radio observations from 2010-2013, we present an analysis of the 123 decametric-hectometric (DH) type II solar radio bursts during this period, the associated type III burst properties, and their correlation with solar…

太阳与恒星天体物理 · 物理学 2015-08-19 L. M. Winter , K. Ledbetter

Evidence for two different physical mechanisms for acceleration of solar energetic particles (SEPs) arose 50 years ago with radio observations of type III bursts, produced by outward streaming electrons, and type II bursts from coronal and…

太阳与恒星天体物理 · 物理学 2013-06-18 Donald V. Reames

We investigated 64 pairs of interacting-CME events identified by the simultaneous observations of SOHO and STEREO spacecraft from 2010 January to 2014 August, to examine the relationship between the large SEP events in the energy of…

太阳与恒星天体物理 · 物理学 2019-01-30 Liu-Guan Ding , Zhi-Wei Wang , Li Feng , Gang Li , Yong Jiang

Solar type II radio bursts are the signature of particle acceleration by shock waves in the solar corona and interplanetary medium. The shocks originate in solar eruptions involving coronal mass ejections (CMEs) moving at super-Alfvenic…

太阳与恒星天体物理 · 物理学 2019-12-17 Nat Gopalswamy , Pertti Mäkelä , Seiji Yashiro

We study selected properties of Solar Energetic Particle (SEP) events as inferred from their associated radio emissions. We used a catalogue of 115 SEP events that consists of entries of proton intensity enhancements at one AU, with…

太阳与恒星天体物理 · 物理学 2015-08-12 A. Kouloumvakos , A. Nindos , E. Valtonen , C. E. Alissandrakis , O. Malandraki , P. Tsitsipis , A. Kontogeorgos , X. Moussas , A. Hillaris

Solar energetic particles (SEPs) are an important product of solar activity. They are connected to solar active regions and flares, coronal mass ejections (CMEs), EUV waves, shocks, Type II and III radio emissions, and X-ray bursts. These…

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: Ep > 10 MeV) events and their solar causes such as solar flares…

太阳与恒星天体物理 · 物理学 2020-07-14 P. Pappa Kalaivani , A. Shanmugaraju , O. Prakash , R. -S. Kim

We present the association rates between solar energetic particles (SEPs) and the radio emission signatures in the corona and IP space during the entire solar cycle 23. We selected SEPs associated with X and M-class flares from the visible…

太阳与恒星天体物理 · 物理学 2014-02-27 R. Miteva , K. -L. Klein , S. W. Samwel , A. Nindos , A. Kouloumvakos , H. Reid

A high-speed halo-type coronal mass ejection (CME), associated with a GOES M4.6 soft X-ray flare in NOAA AR 0180 at S12W29 and an EIT wave and dimming, occurred on 9 November 2002. A complex radio event was observed during the same period.…

天体物理学 · 物理学 2008-01-21 N. J. Lehtinen , S. Pohjolainen , K. Huttunen-Heikinmaa , E. Valtonen , R. Vainio , A. E. Hillaris

We have spent 50 years in heated discussion over which populations of solar energetic particles (SEPs) are accelerated at flares and which by shock waves driven out from the Sun by coronal mass ejections (CMEs). The association of the large…

太阳与恒星天体物理 · 物理学 2017-09-19 Donald V. Reames

Impulsive solar energetic-particle (SEP) events were first distinguished as the streaming electrons that produce type III radio bursts as distinct from shock-induced type II bursts. They were then observed as the surprisingly-enhanced…

太阳与恒星天体物理 · 物理学 2023-10-30 Donald Reames

The most intense solar energetic particle events are produced by coronal mass ejections (CMEs) accompanied by intense type II radio bursts below 15 MHz. Understanding where these type II bursts are generated relative to an erupting CME…

太阳与恒星天体物理 · 物理学 2021-12-08 Alexander M. Hegedus , Ward B. Manchester , Justin C. Kasper

Energetic particle populations are ubiquitous throughout the Universe. In our solar system, the most prominent sources of energetic particles are solar flares or collisionless shocks often driven by huge eruptions of magnetised plasma…

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