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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.

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Radio bursts and cme s

Radio bursts and CME’s

Monique Pick

RHESSI workshop 5-8 April 2006


Radio bursts and cme s

17 March 2002

Y. Yan, M. Pick, M. Wang, S. Krucker, A. Vourlidas

RHESSI

NRH

OSRA

DAM

WAVES


Radio bursts and cme s

17 March 2002 Event A

  • AR 9871

  • 4 NRH frequencies

  • X 164 MHz, 236 MHz

  • West more bursty

  • Type III > 164 MHz


Radio bursts and cme s

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


Radio bursts and cme s

17 March 2002 Event B

Continuum

O

236 MHz

Cadence 1s 600 km/s

Type III’s



Radio bursts and cme s

17 March 2002 Event A

Potential magnetic field extrapolation

(Yan, 2005)


Radio bursts and cme s

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


Radio bursts and cme s

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


Radio bursts and cme s

164 MHz

  • Electrons trace the expansion of

  • the arch system(~2500 km/sec)

  • Coronal wave develops along

  • flank of CME In lateral expansion