NDLI: Recent observations of the formation of filaments

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Recent observations of the formation of filaments

Content Provider	NASA Technical Reports Server (NTRS)
Author	Martin, Sara F.
Copyright Year	1986
Description	Two examples of the formation of small filaments in H alpha are described and illustrated. In both cases, the formation is seen to be the spontaneous appearance of strands of absorbing mass that evolve from no previous structure. The initial development of the filaments appears to consist of the accumulation of these absorptive strands along approximately parallel paths in a channel between large-scale, opposite polarity magnetic fields on either side of the filaments. The strands exhibit continuous changes in shape and degree of absorption which can be due to successive condensations resulting in new strands, mass motions within the strands, and outflow of the mass from the strands. For at least several hours before the formation of both filaments, small-scale fragments of opposite polarity, line-of-sight magnetic flux adjacent to or immediately below the filaments, and at the ends of the filaments, were cancelling. This type of magnetic flux disappearance continued during the development of the filaments and is commonly observed in association with established filaments. Cancellation is interpreted as an important evolutionary change in the magnetic field that can lead to configurations suitable for the formation of filaments.
File Size	8825348
Page Count	8
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19870011450
Archival Resource Key	ark:/13960/t9r25ts6t
Language	English
Publisher Date	1986-12-01
Access Restriction	Open
Subject Keyword	Solar Physics Polarity Solar Atmosphere Solar Prominences Magnetic Field Configurations Evolution Development Solar Magnetic Field Sun Magnetic Signatures Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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