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RHESSI Hard X-Ray Observations of an EUV Jet on August 21, 2003

RHESSI Hard X-Ray Observations of an EUV Jet on August 21, 2003. Lindsay Glesener, S äm Krucker RHESSI Workshop 9, Genova September 4, 2009. Outline. Reminder: Emerging flux model Observations of the August 21, 2003 jet TRACE 171, 1550 RHESSI thermal and nonthermal

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RHESSI Hard X-Ray Observations of an EUV Jet on August 21, 2003

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  1. RHESSI Hard X-Ray Observations of an EUV Jet on August 21, 2003 Lindsay Glesener, Säm Krucker RHESSI Workshop 9, Genova September 4, 2009

  2. Outline • Reminder: Emerging flux model • Observations of the August 21, 2003 jet • TRACE 171, 1550 • RHESSI thermal and nonthermal • Analysis of reconnection geometry

  3. Emerging Flux Model (Shibata et. al, 1996)

  4. Emerging Flux Model (Shibata et. al, 1996) partially occulted

  5. August 21, 2003 flare • Movie! • http://sprg.ssl.berkeley.edu/~glesener/movie.html

  6. RHESSI TRACE 1550 August 21, 2003 flare: Time Profile 6-8 keV 25-50 keV

  7. Red: 6-8 keV Blue: 10-25 keV Hot jet Cool jet Coronal source Contour levels 30, 50, 70, 90% • Visible early (only) • Thermal (<8 keV) and nonthermal (>10 keV) emission • Overall RHESSI temp ~13 K • Reconnection outflow?

  8. Red: 6-8 keV Blue: 10-25 keV Hot jet Cool jet Coronal source Contour levels 30, 50, 70, 90% • Visible early (only) • Thermal (>8 keV) and nonthermal (>10 keV) emission • Overall RHESSI temp ~13 K • Reconnection outflow?

  9. Red: 6-8 keV Blue: 25-50 keV Hot jet Cool jet Base of the Jet Contour levels 30, 50, 70, 90% • Nonthermal emission (>25 keV) • No thermal emission • Overall RHESSI temp ~22 MK

  10. Red: 6-8 keV Blue: 25-50 keV Hot jet Cool jet Near-Limb Source Contour levels 30, 50, 70, 90% • Present throughout flare and jet. • Thermal (<10 keV) and nonthermal (>12 keV) • Temp ~24 MK • Thermal electron density • Instantaneous nonthermal electron density at peak time: • Integrate over energy, use ni=thermal density • Result: nnontherm ~ 2x108 cm-3

  11. Red: 6-8 keV Blue: 25-50 keV Hot jet Cool jet Near-Limb Source Contour levels 30, 50, 70, 90% • Late in the flare, a small, hot loop becomes visible:

  12. Red: 6-8 keV Blue: 25-50 keV Hot jet Cool jet Near-Limb Source Contour levels 30, 50, 70, 90% • Late in the flare, a small, hot loop becomes visible:

  13. Conclusion… • RHESSI observed HXR from an EUV jet. The HXR locations and timing could indicate emission from reconnection outflow jets, lending support to the emerging flux model. Lingering Questions… • Other explanations for the coronal emission? Outflow jets? Looptop source? Something else?? • Why do we see nonthermal emission from the jet base with no thermal emission?

  14. Extra Stuff

  15. Red: 6-8 keV Blue: 25-50 keV Red: 6-8 keV Blue: 25-50 keV RHESSI images Contour levels 30, 50, 70, 90% Red: 6-8 keV Blue: 10-25 keV Early phase First peak Second peak

  16. August 21, 2003 flare: Spectra Late phase Early phase

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