Alfven surface

noun

The outer edge of the corona. The boundary that separates a star's atmosphere from its exosphere (heliosphere, astrosphere), where Alfven waves transition into stellar wind (solar wind).

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Meanings

nounAlfven surface (plural Alfven surfaces)

plural Alfven surfaces · alternative Alfvén surface

  1. stellar astronomyThe outer edge of the corona. The boundary that separates a star's atmosphere from its exosphere (heliosphere, astrosphere), where Alfven waves transition into stellar wind (solar wind).

Origin

Named after H.O.G. Alfvén.

Full word history & related roots →
Cite this entry
APA

Alfven surface. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/Alfven%20surface

MLA

“Alfven surface.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/Alfven%20surface. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “Alfven surface,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/Alfven%20surface.

Source: Alfven surface on Wiktionary, CC BY-SA 4.0.