Slowly Drifting Fine-Structure Radio Continuum of  4 April 2001

• General data

  GOES soft X-rays           * Some images

*SOHO/LASCO/C2

  SOHO/LASCO/C3

• SLowly drifting continuum


* Compressed dynamic spectrum (06-12 UT)

* Continuum on the dynamic spectrum of 09:00-10:50 UT

* Fixed-frequency plots (169, 204, and 3000 MHz)

*  Low-frequency extension of the continuum on the WIND spectrum (1-14 MHz)

• EUV activity in the south leg of the CME


SOHO/EIT, 195 A (modified)

SOHO/EIT, 195 A (difference to 08:00 UT)

* SOHO/EIT, 195 A (running difference)

• Location and dynamics of the radio sourse in the south leg of the CME: Nancay RH, 164 MHz

 
*NRH and CME
 
*NRH and radio spectrum


*NRH and radio spectrum

 
*SOHO/EIT 195 A SE-quadrant and NRH
 
*NRH and SOHO/EIT 195 A difference images

• Inner structure of the continuum


* Continuum on the dynamic spectrum of 09:00-10:50 UT

Various features of time scale from several seconds to tens of seconds.

-- Pulsating regimes of plasma instabilities.

-- Oscilations of  large-scale post-CME magnetic tubes by standing or propagating MHD waves.

(See Zaitsev, Stepanov, 1975; Aschwanden, 1987, Aurass, Mann, 1987).

• Plasma or gyrosynchrotron radio emission

Culgoora Radioheliograph (see Stewart, 1985):
                                                                                        IVM bursts in white-light plasmoids.
Clark Lake Radioheliograph (see Gopalswamy, Kundu, 1990):
 

This case

Plasma emission:  164 MHz at h~0.77 Rs,    N~(10-20) No

Gyrosynchrotron emission:  h~0.77 Rs,    E~100 keV,  10th harmonics,  H~5.8 G
                                                                (see Stewart, 1982)

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