Hard X-ray and radio observations of the 3 June 2007 flare Nicole Vilmer Meriem Alaoui Abdallaoui Solar Activity during the Onset of Solar Cycle 24 8-12.

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Presentation transcript:

Hard X-ray and radio observations of the 3 June 2007 flare Nicole Vilmer Meriem Alaoui Abdallaoui Solar Activity during the Onset of Solar Cycle December 2008, Napa, Ca

GOES A The Context RHESSI NRH RHESSI NRH GOES C3.5 flare SF Flare S07 E65 LASCO CME Narrow (70°) and slow (393 km/s)) Radio flux= flux from the AR 6-10 keV and keV Fluxes are derived from Spectral analysis (see after)

The Context RHESSI count spectrum WIND WAVES 0.02 MHz-14 MHZ 09:2409:40 DAM Nançay MHz PHOENIX Zürich MHz Attenuator changes Type III bursts first below 100 MHz And then at higher frequencies With HXR emissions Type II burst below 80 MHz Faint continuum around 300 MHz

Spatial Evolution of the X-ray flare as seen from Hinode and RHESSI XRT Al_Thick >10 7 K XRT Ti-poly around 10 7 K Source at the north from

XRT RHESSI 3-6 keV, 6-12 keV and keV

RHESSI image keV 09:27:07 UT with pixon Spectral index-3

09:26:23 09:26:37 09:26: MHz: red 236 MHz: yellow 241 MHz green 327 MHz blue 408 MHz light blue 432 MHz purple

432 MHz 408 MHz 327 MHz 241 MHz 236 MHz 150 MHz 09:27:4509:27:58 09:28:00 09:28:06 09:28:25 09:29:06

432 MHz 408 MHz 327 MHz 241 MHz 236 MHz 150 MHz 09:30:06 09:28:00 09:28:06 09:28:25 09:29:06 09:31:16 09:32:16 09:32:31

432 MHz 236 MHz 150 MHz

432 MHz 408 MHz 327 MHz 241 MHz 236 MHz 150 MHz 09:30:06 09:28:00 09:28:06 09:28:25 09:29:06 09:31:16 09:32:16 09:32:31 Cospatiality of the X-ray and radio sources Radio spectrum Origin of the emission??

Preliminary conclusions and working directions Unusual observational facts: from 09:34 UT (end of the X-ray flare) new X-ray source observed by RHESSI in the 10 keV range (thermal??) cospatial with bright source observed with XRT, north of the main flaring region One leg of the CME structure? New energy release due to reconnection in III From Owens and Crooker, 2006 

Preliminary conclusions and working directions Unusual observational facts: from 09:34 UT (end of the X-ray flare) Weak (a few sfu) radio emission from 450MHz to 150 MHZ Emission at all frequencies cospatial with X-ray emission (centroid not same size…) Flat radio spectrum Origin?? Thermal bremsstrahlung or gyro synchrotron?? The radio emission must escape from the medium  lower density region than usual (local mass loss due to the CME??)