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 248-12 December 2008, Napa, Ca

GOES0.5-4 A The

ContextRHESSI

NRH

RHESSI

RHESSI

RHESSI

NRH

GOES C3.5 flare

SF Flare S07 E65

LASCO CMENarrow (70°) and slow(393 km/s))

Radio flux= flux from the AR

6-10 keV and 13-25 keV Fluxes are derived fromSpectral analysis(see after)

The Context

RHESSI count spectrum

WIND WAVES0.02 MHz-14 MHZ

09:24 09:40

DAM Nançay10-70 MHz

PHOENIX Zürich116-1000 MHz

Attenuator changes

Type III bursts first below 100 MHzAnd then at higher frequenciesWith HXR emissionsType II burst below 80 MHzFaint continuum around 300 MHz

Spatial Evolution of the X-ray flare as seen from Hinode and

RHESSI

XRT Al_Thick >107 K XRT Ti-poly around 107K

Source at the north from 093350

XRTRHESSI 3-6 keV, 6-12 keV and 12-25 keV

RHESSI image 50-100 keV09:27:07 UT with pixon

Spectral index-3

09:26:23

09:26:37

09:26:57

150 MHz: red236 MHz: yellow241 MHz green327 MHz blue408 MHz light blue432 MHz purple

432 MHz432 MHz

408 MHz

327 MHz

241 MHz

236 MHz 150 MHz

150 MHz

09:27:45 09:27:58

09:28:0009:28:06

09:28:2509:29:06

432 MHz432 MHz

408 MHz

327 MHz

241 MHz

236 MHz 150 MHz

150 MHz

09:30:06

09:28:0009:28:06

09:28:2509:29:06

09:31:16

09:32:16 09:32:31

432 MHz

236 MHz

150 MHz

432 MHz432 MHz

408 MHz

327 MHz

241 MHz

236 MHz 150 MHz

150 MHz

09:30:06

09:28:0009:28:06

09:28:2509:29:06

09:31:16

09:32:16 09:32:31

Cospatiality of the X-ray and radio sourcesRadio spectrumOrigin 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 MHZEmission 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??)