On the correlation between the orientation of moving magnetic features and the large-scale twist of sunspots

Vasyl Yurchyshyn, Haimin Wang, Philip R. Goode

Research output: Contribution to journalArticlepeer-review

31 Scopus citations

Abstract

We present new results on the nature of moving magnetic features (MMFs) deduced from Big Bear Solar Observatory observations of the longitudinal magnetic fields of two large solar spots. MMFs are small magnetic bipoles that move outward across the moat of an eroding sunspot. We find that MMFs are not randomly oriented. To wit, in 21 out of 28 (75%) MMF pairs, the magnetic element having the polarity of the sunspot was located farther from the sunspot. Furthermore, there is a correlation between the orientation of the bipole and that of the twist in a sunspot. For the two nearly round sunpots we studied, we found that the bipoles were rotated counterclockwise in the case of a clockwise twisted sunspot and clockwise for a spot with counterclockwise twist. We also found a correlation between the orientation of MMF bipole and the amount of twist in the spot. The MMF bipoles around the highly twisted sunspot are oriented nearly tangential to the edge of the sunspot, while in the slightly twisted sunspot the bipoles are oriented nearly radially so that they point back to the spot.

Original languageEnglish (US)
Pages (from-to)470-474
Number of pages5
JournalAstrophysical Journal
Volume550
Issue number1 PART 1
DOIs
StatePublished - Mar 20 2001

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Keywords

  • Sun: chromosphere
  • Sun: magnetic fields
  • Sunspots

Fingerprint Dive into the research topics of 'On the correlation between the orientation of moving magnetic features and the large-scale twist of sunspots'. Together they form a unique fingerprint.

Cite this