Solar coronal magnetic field topology inferred from high resolution optical and x-ray movies
The authors are using high resolution digital movies of solar active regions in optical and X-ray wavelengths to study solar flares and other transients. The optical movies were collected at the Swedish Solar Observatory on La Palma using the Lockheed tunable filtergraph system, in May-July, 1992. They include longitudinal and transverse magnetograms, H-alpha Doppler and intensity images at many wavelengths, Ca K, Na D, and white light images. Simultaneous X-ray images from Yohkoh are available much of the time. Several ways to establish the connectivity of some coronal magnetic field lines are being explored. Some of the clues available are: magnetic footpoint polarities and transverse field direction; H-alpha fibrils and loops seen in several wavelengths; proper motion and Dopper shifts of blobs moving along field lines; footprint brightening in micro-flares; spreading of flare ribbons during gradual phases of flares; X-ray morphology and correlations with H-alpha; and draining of flare loops. Examples of each of these will be shown on video.
- OSTI ID:
- 6176280
- Report Number(s):
- CONF-9306217-; CODEN: AASBAR; CNN: NASW-4612; NAS8-37334
- Journal Information:
- American Astronomical Society, Bulletin; (United States), Vol. 25:2; Conference: 182. meeting of the American Astronomical Society (AAS), Berkeley, CA (United States), 6-10 Jun 1993; ISSN 0002-7537
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
GENERAL PHYSICS
MAGNETIC FIELDS
TOPOLOGY
SOLAR CORONA
VIDEO TAPES
ASTROPHYSICS
CORRELATIONS
IMAGES
MORPHOLOGY
SOLAR FLARES
VISIBLE RADIATION
X RADIATION
ATMOSPHERES
ELECTROMAGNETIC RADIATION
IONIZING RADIATIONS
MAGNETIC STORAGE DEVICES
MAGNETIC TAPES
MATHEMATICS
MEMORY DEVICES
RADIATIONS
SOLAR ACTIVITY
SOLAR ATMOSPHERE
STELLAR ATMOSPHERES
STELLAR CORONAE
661320* - Auroral
Ionospheric
& Magnetospheric Phenomena- (1992-)