Surface magnetic field effects in local
β
H. Schunker; D. C. Braun; P. S. Cally
π
Article
π
2007
π
John Wiley and Sons
π
English
β 690 KB
## Abstract Using helioseismic holography strong evidence is presented that the phase (or equivalent travelβtime) of helioseismic signatures in Dopplergrams within sunspots depend upon the lineβofβsight angle in the plane containing the magnetic field and vertical directions. This is shown for the