Progress in the study of interplanetary discontinuities

Marcia Neugebauer, Joe Giacalone

Research output: Chapter in Book/Report/Conference proceedingConference contribution

18 Citations (Scopus)

Abstract

This paper summarizes some of the recent rebirth of interest in interplanetary discontinuities. Vasquez et al. have developed a new method of searching for discontinuities that allows the study of structures with small angles of rotation. Those discontinuities are consistent with the in situ generation of discontinuities by Alfvénic turbulence. Borovsky has proposed that discontinuities with large rotation angles are the boundaries of flux tubes originating at the Sun. We conclude that both the Sun and turbulence are important sources of interplanetary discontinuities. We also argue that, at least in the slow solar wind, Tsurutani's in-situ generation by phase-steepened Alfvén waves may be a manifestation of exhaust fan reconnection. We furthermore suggest that such reconnection may be responsible for the Walen ratio ([4πρ]1/2|Δv|/|ΔB|) across rotational discontinuities being less than the theoretically predicted value of unity. Whether or not the wind consists of discrete flux tubes rather than being simply discontinuous remains to be determined.

Original languageEnglish (US)
Title of host publicationAIP Conference Proceedings
Pages194-197
Number of pages4
Volume1216
DOIs
StatePublished - 2010
Event12th International Solar Wind Conference - Saint-Malo, France
Duration: Jun 21 2009Jun 26 2009

Other

Other12th International Solar Wind Conference
CountryFrance
CitySaint-Malo
Period6/21/096/26/09

Fingerprint

discontinuity
sun
turbulence
tubes
fans
solar wind
unity

Keywords

  • Interplanetary turbulence
  • Solar sources of solar wind
  • Solar wind discontinuities

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Neugebauer, M., & Giacalone, J. (2010). Progress in the study of interplanetary discontinuities. In AIP Conference Proceedings (Vol. 1216, pp. 194-197) https://doi.org/10.1063/1.3395834

Progress in the study of interplanetary discontinuities. / Neugebauer, Marcia; Giacalone, Joe.

AIP Conference Proceedings. Vol. 1216 2010. p. 194-197.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Neugebauer, M & Giacalone, J 2010, Progress in the study of interplanetary discontinuities. in AIP Conference Proceedings. vol. 1216, pp. 194-197, 12th International Solar Wind Conference, Saint-Malo, France, 6/21/09. https://doi.org/10.1063/1.3395834
Neugebauer M, Giacalone J. Progress in the study of interplanetary discontinuities. In AIP Conference Proceedings. Vol. 1216. 2010. p. 194-197 https://doi.org/10.1063/1.3395834
Neugebauer, Marcia ; Giacalone, Joe. / Progress in the study of interplanetary discontinuities. AIP Conference Proceedings. Vol. 1216 2010. pp. 194-197
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