Gamma Radiation From Flare-Accelerated Particles Impacting the Sun

2006 ◽  
Author(s):  
Gerald H. Share ◽  
Ronald J. Murphy
Keyword(s):  
Gamma Radiation ◽  
The Sun ◽  
Accelerated Particles

scholarly journals QUASI-PERIODIC PULSATIONS IN SOLAR AND STELLAR FLARES. REVIEW

2020 ◽  
Vol 6 (1) ◽  
pp. 3-29
Author(s):  
Elena Kupriyanova ◽  
Dmitrii Kolotkov ◽  
Valery Nakariakov ◽  
Anastasiia Kaufman
Keyword(s):  
State Of The Art ◽  
The Sun ◽  
Periodic Modulation ◽  
Stellar Flares ◽  
Open Questions ◽  
Magnetic Spectrum ◽  
Similarities And Differences ◽  
Electro Magnetic ◽  
Accelerated Particles ◽  
Oscillatory Processes

This paper provides an overview of the state-of-the-art studies of oscillatory processes in solar and stellar flares, based on modern observational data from ground-based and space-borne instruments with high temporal, spatial, and spectral resolution in different electro-magnetic spectrum ranges. We examine the mechanisms that generate flare emission and its quasi-periodic modulation. We discuss similarities and differences between solar and stellar flares, and address associated problems of superflares on the Sun and space weather problems. Quasi-periodic pulsations (QPPs) of flare radiation are shown to be an effective tool for diagnosing both the flare processes themselves and the parameters of flare plasma and accelerated particles. We consider types of QPPs, their statistical properties, and methods of analysis, taking into account the non-stationarity of the QPPs’ parameters. We review the proposed mechanisms of QPPs and address open questions.

Low energy gamma radiation in the atmosphere during active and quiet periods on the Sun

1970 ◽  
Vol 18 (6) ◽  
pp. 939-943 ◽  
Author(s):  
E.L. Chupp ◽  
D.J. Forrest ◽  
A.A. Sarkady ◽  
P.J. Lavakare
Keyword(s):  
Gamma Radiation ◽  
Low Energy ◽  
The Sun ◽  
Energy Gamma

scholarly journals Coronal and Heliospheric Observations of Solar Particle Events

1996 ◽  
Vol 154 ◽  
pp. 179-186
Author(s):  
Monique Pick
Keyword(s):  
Magnetic Field ◽  
Interplanetary Magnetic Field ◽  
Interplanetary Medium ◽  
Solar Wind Plasma ◽  
Low Energy ◽  
The Sun ◽  
Particle Beams ◽  
Solar Particle Events ◽  
Magnetic Structures ◽  
Accelerated Particles

AbstractObservations of accelerated particle beams are used to probe the coronal and interplanetary magnetic field structures over large distances from the Sun on the order of a few AU and for various heliolatitudes. It is shown that the propagation of low energy particles is very much controled by discrete interplanetary magnetic field structures. These discrete magnetic structures are sometimes embedded within interplanetary solar wind plasma disturbances, commonly called CMEs. The connection between the corona and the interplanetary medium is discussed. These observations lead to new insights on the origin of accelerated particles detected in association with CMEs.

scholarly journals QUASI-PERIODIC PULSATIONS IN SOLAR AND STELLAR FLARES. REVIEW

2020 ◽  
Vol 6 (1) ◽  
pp. 3-23 ◽  
Author(s):  
Elena Kupriyanova ◽  
Dmitrii Kolotkov ◽  
Valery Nakariakov ◽  
Anastasiia Kaufman
Keyword(s):  
Spectral Resolution ◽  
State Of The Art ◽  
Electromagnetic Spectrum ◽  
The Sun ◽  
Periodic Modulation ◽  
Stellar Flares ◽  
Open Questions ◽  
Similarities And Differences ◽  
Accelerated Particles ◽  
Oscillatory Processes

This paper provides an overview of the state-of-the-art studies of oscillatory processes in solar and stellar flares, based on modern observational data from ground-based and space-borne instruments with high temporal, spatial, and spectral resolution in different bands of the electromagnetic spectrum. We examine the mecha-nisms that generate flare emission and its quasi-periodic modulation. We discuss similarities and differences be-tween solar and stellar flares, and address associated problems of superflares on the Sun and space weather. Quasi-periodic pulsations (QPPs) of flare emission are shown to be an effective tool for diagnosing both the flare processes themselves and the parameters of flaring plasmas and accelerated particles. We consider types of QPPs, their statistical properties, and methods of analysis, taking into account the non-stationarity of the QPPs’ parameters. We review the proposed mechanisms of QPPs and summarize open questions.

scholarly journals Directionality of Flare-accelerated -Particles at the Sun

2003 ◽  
Vol 595 (2) ◽  
pp. L89-L92 ◽  
Author(s):  
Gerald H. Share ◽  
Ronald J. Murphy ◽  
David M. Smith ◽  
Robert P. Lin ◽  
Brian R. Dennis ◽  
...  
Keyword(s):  
The Sun ◽  
Accelerated Particles
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