Local circumstellar magnetic fields around evolved stars

Noam Soker*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

I argue that the presence of magnetic fields around evolved stars, e.g. asymptotic giant branch stars, and in planetary nebulae, does not necessarily imply that the magnetic field plays a global dynamical role in shaping the circumstellar envelope. Instead, I favour magnetic fields with small coherence lengths, which result from stellar magnetic spots or from jets blown by an accreting companion. Although the magnetic field does not play a global role in shaping the circumstellar envelope, it may enhance local motion (turbulent) via magnetic tension and reconnection. The locally strong magnetic tension may enforce coherence flow, which may favour the masing process.

Original languageEnglish
Pages (from-to)826-830
Number of pages5
JournalMonthly Notices of the Royal Astronomical Society
Volume336
Issue number3
DOIs
StatePublished - 1 Nov 2002
Externally publishedYes

Keywords

  • Circumstellar matter
  • Masers
  • Planetary nebulae: general
  • Stars: AGB and post-AGB
  • Stars: magnetic fields

Fingerprint Dive into the research topics of 'Local circumstellar magnetic fields around evolved stars'. Together they form a unique fingerprint.

Cite this