Hostname: page-component-745bb68f8f-l4dxg Total loading time: 0 Render date: 2025-01-12T20:39:51.865Z Has data issue: false hasContentIssue false
  • English
  • Français

Wave Structure within HI Filaments at High Galactic Latitude and the Nature of “Clouds” in Interstellar Space

Published online by Cambridge University Press:  03 August 2017

Gerrit L. Verschuur
Gerrit L. Verschuur*
Affiliation:
4802 Brookstone Terrace, Bowie, MD 20720

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

Large amplitude waves have been found in the morphology and velocity patterns of several long filaments of HI at high latitude. HI in the filaments is controlled by magnetic fields and the velocity patterns and morphology bear the hallmarks of Alfvén waves. Enhanced emission features (EEFs), traditionally referred to as “clouds,” are seen wherever a segment of flux tube is viewed end-on. This suggests that HI emission structure teaches us about field geometry and not about cloud physics. Similar effects have been recognized in other regions mapped with high-resolution as well as in completely mapped high-velocity “clouds.”

Type
I. The Disk-Halo Interface in Our Galaxy
Information
Symposium - International Astronomical Union , Volume 144: The Interstellar Disk-Halo Connection in Galaxies , 1991 , pp. 93 - 96
Copyright
Copyright © Kluwer 1991 

References

REFERENCES

Guhathakurta, P. and Tyson, J. A. (1989) Ap. J. 346, 773 CrossRefGoogle Scholar
Verschuur, G. L. (1974) Ap. J. Suppl. 27, 65 CrossRefGoogle Scholar
Verschuur, G. L. (1990) Ap. J. September. In press.Google Scholar