Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991ap%26ss.185..137v&link_type=abstract
Astrophysics and Space Science (ISSN 0004-640X), vol. 185, no. 1, Nov. 1991, p. 137-152.
Astronomy and Astrophysics
Astrophysics
18
Galactic Structure, H I Regions, Interstellar Gas, Neutral Gases, Star Formation, Gas Dynamics, Interstellar Magnetic Fields, Magnetic Flux, Velocity Distribution
Scientific paper
Large-scale morphological waves with wavelengths of order 30 deg and amplitude = 1/8 wavelength exist in several long H I filaments in a 540-deg square degrees of sky around l = 230 deg, b = +40 deg. The extent of the longest filament is greater than 72 deg, the limit set by the boundaries of the area surveyed. The H I gas appears to be controlled by magnetic fields and the motion within flux tubes, determined by analysis of velocity along the filament axes, shows the presence of wave patterns with amplitude 5 to 6 km/s on an angular scale similar to that seen in the spatial structure projected on the sky.
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