IAFE   05512
INSTITUTO DE ASTRONOMIA Y FISICA DEL ESPACIO
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Azimuthal variation in the properties of cosmic ray acceleration at
the blast wave of SN 1006
Autor/es:
HUGHES, J. P.; REYNOSO, E. M.; BADENES, CARLES; MOFFETT, D. A.; CASSAM-CHENAÏ, GAMIL
Lugar:
Montreal, Canadá
Reunión:
Simposio; 37th COSPAR Scientific
Assembly; 2008
Resumen:
We present evidence for morphological changes due to efficient cosmic
ray (CR) ion acceleration in the structure of the southeastern region of
the supernova remnant SN 1006 using a combination of multi-wavelength
observations. The forward shock front is clearly traced by a filament of
Balmer emission in the southeast. This optical emission allows us to
trace the location of the blast wave (BW) even where the synchrotron
emission from relativistic electrons is either absent or too weak to
detect. The contact discontinuity (CD) is traced using the low-energy
X-ray (i.e., oxygen band) image which we argue reveals the distribution
of shocked ejecta. We interpret the azimuthal variations of the ratio of
radii between the BW and CD plus the X-ray and radio synchrotron
emission at the BW using CR-modified hydrodynamic models. Different
azimuthal profiles are assumed for the injection rate of particles into
the acceleration process, magnetic field and level of turbulence. We
found that the observations are consistent with a model in which these
parameters are all azimuthally varying, being largest in the brightest
regions.