Coronal waves: hot structure and footprint of CME

1010 K >Temperature > 104 K, SXI filter ratio gives 3-6 106 K

Be

Thick

Thin

Last brightening is footprint of CME leg

Model:expanding flux rope

Delannée et al. (in press)

projection view top view

weaker & stronger J sheets

Electric current shell formed in the dynamic phase when

uz < cA

Model: in multipolar magnetic field

Conclusions

• Coronal waves are hot structures.

• They stop at coronal hole, where the CME leg footprint is.

• They are possibly signature of opening of magnetic field lines near the solar surface.