html5-img
1 / 14

Radio bursts and CME’s

Radio bursts and CME’s. Monique Pick RHESSI workshop 5-8 April 2006. 17 March 2002 Y. Yan, M. Pick, M. Wang, S. Krucker, A. Vourlidas. RHESSI. NRH. OSRA. DAM. WAVES. 17 March 2002 Event A. AR 9871 4 NRH frequencies X 164 MHz, 236 MHz West more bursty Type III > 164 MHz.

hisano
Télécharger la présentation

Radio bursts and CME’s

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Radio bursts and CME’s Monique Pick RHESSI workshop 5-8 April 2006

  2. 17 March 2002 Y. Yan, M. Pick, M. Wang, S. Krucker, A. Vourlidas RHESSI NRH OSRA DAM WAVES

  3. 17 March 2002 Event A • AR 9871 • 4 NRH frequencies • X 164 MHz, 236 MHz • West more bursty • Type III > 164 MHz

  4. 17 March 2002 Event B RHESSI HXR West source + polarity East and middle sources mixed polarity SXR Outline 2 adjacent loops 3 HXR sources at foot points

  5. 17 March 2002 Event B Continuum O 236 MHz Cadence 1s 600 km/s Type III’s

  6. 17 March 2002 Event B Continuum

  7. 17 March 2002 Event A Potential magnetic field extrapolation (Yan, 2005)

  8. 17 March 2002 Event B • AR 9871 inside old remnant region • Inclusion of small interacting loops • CME above large extrapolated S loops HXR and Radio: Temporal relationship Sprangle &Vlahos, 1993 EM excited by unstable electron distribution inside the flaring loop and excite electrons along Open fields. • HXR • West source + polarity • East and middle sources mixed polarity • SXR • Outline 2 adjacent loops « W » shape

  9. 17 March 2002 Event B HXR and Type III same electron population • Small loops emerge(1 or 2) interact with surrounding open field lines • HXR produced by electrons propagating downward • Outward electron beams propagate in the interface region • between the ascending CME and the neighboring open field lines • Development of CME this region becomes highly compressed • TypeIII 2fp starting and ending altitudes at each frequency • Apparent motions of type III bursts increase in density 10 (4 at 164 MHz) Newkirk model

  10. 164 MHz • Electrons trace the expansion of • the arch system(~2500 km/sec) • Coronal wave develops along • flank of CME In lateral expansion

More Related