hard x-ray and radio observations of the 3 june 2007 flare
DESCRIPTION
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 December 2008, Napa, Ca. GOES 0.5-4 A. The Context. RHESSI. GOES C3.5 flare SF Flare S07 E65 LASCO CME Narrow (70°) and slow - PowerPoint PPT PresentationTRANSCRIPT
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??)