E-W motions of large-scale magnetic field structures of the sun

✍ Scribed by V. M. Grigoryev; S. M. Latushko

• Publisher: Springer
• Year: 1992
• Tongue: English
• Weight: 403 KB
• Volume: 140
• Category: Article
• ISSN: 0038-0938
• DOI: 10.1007/bf00146311

✦ Synopsis

By applying a new method of processing daily full-disk magnetograms obtained at the Wilcox Solar Observatory at Stanford University, it has become possible to reveal the pattern of global E-W motions of field structures which appears to reflect large-scale convective plasma motions beneath the photosphere.

Structures of E-W velocity of different sign extend from north to south, traversing the equator. The extent of the structures in longitude is 25~

~ and the velocity amplitude reaches 0?4-0?5 day-1 (60-70 m s 1 at the equator). Boundaries of E-W flows of different sign correlate with strong, large-scale magnetic field hills. The lifetime of the velocity structures is comparable with that of magnetic field structures.