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Characteristics of gamma-ray line flares
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Bai, T. Dennis, B. |
| Copyright Year | 1983 |
| Description | Observations of solar gamma rays by the Solar Maximum Mission (SMM) demonstrate that energetic protons and ions are rapidly accelerated during the impulsive phase. To understand the acceleration mechanisms for these particles, the characteristics of the gamma ray line flares observed by SMM were studied. Some very intense hard X-ray flares without detectable gamma ray lines were also investigated. Gamma ray line flares are distinguished from other flares by: (1) intense hard X-ray and microwave emissions; (2) delay of high energy hard X-rays; (3) emission of type 2 and/or type 4 radio bursts; and (4) flat hard X-ray spectra (average power law index: 3.1). The majority of the gamma ray line flares shared all these characteristics, and the remainder shared at least three of them. Positive correlations were found between durations of spike bursts and spatial sizes of flare loops as well as between delay times and durations of spike bursts. |
| File Size | 3600696 |
| Page Count | 55 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19840006030 |
| Archival Resource Key | ark:/13960/t0xq1tt8b |
| Language | English |
| Publisher Date | 1983-10-01 |
| Access Restriction | Open |
| Subject Keyword | Solar Physics Solar X-rays Solar Flares Heavy Ions Radio Bursts X Ray Spectra Particle Acceleration Solar Protons Solar Maximum Mission Gamma Ray Bursts Energetic Particles Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
