Subsurface characteristics of sunspots

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11 Scopus citations

Abstract

Time-distance helioseismology provides 3-D subphotospheric maps of sunspots, emerging magnetic structures and associated convective flows. This gives us new insights into the basic physical processes inside the Sun, formation of magnetic structures in the solar plasma and mechanisms of solar activity. Recent results from the MDI instrument on SOHO reveal complicated stratification and flow patterns of solar plasma beneath sunspots, with a characteristic temperature increase in deeper layers and multiple vortex systems, providing evidence for a cluster model of sunspots. The helioseismic observations provide important clues for understanding the mechanisms of the formation of sunspots and active regions, and the subphotospheric dynamics of convective flows shearing and twisting magnetic fields in the corona.

Original languageEnglish (US)
Pages (from-to)876-885
Number of pages10
JournalAdvances in Space Research
Volume38
Issue number5
DOIs
StatePublished - Jan 1 2006
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering
  • Astronomy and Astrophysics
  • Geophysics
  • Atmospheric Science
  • Space and Planetary Science
  • Earth and Planetary Sciences(all)

Keywords

  • Active regions
  • Sunspots
  • Time-distance helioseismology

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