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The abnormal wide annihilation line of solar flares

The abnormal wide annihilation line of solar flares. ShiChao TANG. Content. Observation Wide Line 3gamma/2gamma ratio Time profile Problem with the models. High Energy Resolution. http://hesperia.gsfc.nasa.gov/hessi/concept.htm. High Energy Resolution. Share et al 2003. Wide Line.

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The abnormal wide annihilation line of solar flares

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  1. The abnormal wide annihilation line of solar flares ShiChao TANG

  2. Content • Observation • Wide Line • 3gamma/2gamma ratio • Time profile • Problem with the models

  3. High Energy Resolution http://hesperia.gsfc.nasa.gov/hessi/concept.htm

  4. High Energy Resolution Share et al 2003

  5. Wide Line Thermal 6000 K

  6. Wide Line • Positronium formed via charge exchange in flight, ~6000K • Thermally broadened in a hot region with temperature of ~400000 K

  7. Annihilation

  8. 3 Gamma Continum para-positronium ortho-positronium T+, D+, ->3 gamma/2 gamma- Share 2004

  9. 3 gamma/2 gamma Share 2004

  10. 3 gamma/2 gamma 6000 K imply a ratio of ~ 3.7

  11. Time Profile Schrijver 2006

  12. Time Profile

  13. Different precipitation regions Schrijver 2006

  14. Where are they from? • In flight? • ? • Quiet Sun? • Not in equilibrium • Flare loop? • Different precipitation regions, the positrons from \beta+ decay can not go into the flare loop. • Bulk motion? • The other nuclear de-excitation lines were not broaden

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