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Réunion IAP 21 Décembre 2006. Radio emissions from the corona and inner heliosphere. JLB / 2002.04.24 / ST-21 / EGS-Nice - 2 -. Coronal Mass Ejections. Fast and narrow CMES associated with short duration emissions (electron beams, typeIII). Fast and large CMEs associated with

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Radio emissions from the corona and inner heliosphere
Radio emissions from the corona and inner heliosphere

JLB / 2002.04.24 / ST-21 / EGS-Nice- 2 -


Coronal mass ejections
Coronal Mass Ejections

Fast and narrow CMES associated with short duration emissions

(electron beams, typeIII).

Fast and large CMEs associated with

complex radio emissions at meter

wavelengths lasting >> 10 minutes.

Also associated with flares

Radio detects these events above the solar limb and on-disk


Flare/CME events

  • Radio complex events

    over a large frequency range

    Similarity 1MHz and 1-3 GHz

    Reiner et al. (2001,02)

  • Long duration >20 min

  • Origin in low corona



Halo cme may 02 1998 disk observations
Halo CME May 02 1998: Disk observations

Pohjolainen et al., 2001


CME proxies

On-disk and limb CMEs

  • Fast progression in latitude

  • Full extend: < 10 min

  • Successive loop interactions

  • Super-alfvenic disturbance

W

E

N

S

  • Angular extend

  • Speed (3000km/s)

Duration (lateral spread)

Indication on V


Cme and complex radio events
CME and Complex radio events

  • 26 complex radio events 20 events associated with shocks (type II-like features)

  • 26 associated with CMEs (also Cane, 2002); 17 halo CMEs; 7 Width> 100°. (reach Earth)

  • *Emitting radio sources (NRH meter λ) complexand spread over a large volume; onset of new sources

  • * Coronal processes, involving multiple B system participate in the eruption.

    Maia and Pick, ApJ, 609, 1082 2004

    Pick et al, AdSR 35 1976 2005


Cme and complex radio events from our web site nan ay observing time
CME and Complex radio events(From our web site, Nançay observing time)

  • Janvier-Juillet 2006 20 CMEs

  • 18 associés avec TYPE III (Waves)-16 complex

    • 2 partiellement occultés

  • 2 rien 05 Janvier 15:30; 30 mai 15:30

  • Projet origine solaire ICMEs (à terre) et vent rapide

    --ICMEs (à terre) Magnetic clouds, flux rope, Ejecta

    (R, θ, φ)

    • Analyse solaire


A new web site for radio monitoringA. Bouteille, R. RomagnanM. Pick, M. Maksimovic, J. L. Bougeret, A. Lecacheux,(LESIA)C. Alissandrakis, X. Moussas , A. Hillaris (Greece)A. Vourlidas, R. Howard (NRL) CMEs (V, W, PA)

Goal: one radio spectrum in combining data from different spectrographs (large freq. Range)

-Nançay Radioheliograph (metric λ)

-NRH real time

- LASCO CME and SECCHI CME summary (in near future)

-SWAVES near future

-NRH imaging link with the SWB

http://secchirh.obspm.fr/


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