Solar coronal magnetic field topology inferred from high resolution optical and x-ray movies

Conference · Fri Jan 01 04:00:00 EST 1993 · American Astronomical Society, Bulletin; (United States)

OSTI ID:6176280

Tarbell, T; Frank, Z; Hurlburt, N; Morrison, M; Shine, R; Title, A; Acton, L

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--; CNN: NASW-4612; NAS8-37334
• Conference Information: Journal Name: American Astronomical Society, Bulletin; (United States) Journal Volume: 25:2
• Country of Publication: United States
• Language: English

Related Subjects

661320* -- Auroral
Ionospheric
& Magnetospheric Phenomena-- (1992-)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ASTROPHYSICS
ATMOSPHERES
CORRELATIONS
ELECTROMAGNETIC RADIATION
IMAGES
IONIZING RADIATIONS
MAGNETIC FIELDS
MAGNETIC STORAGE DEVICES
MAGNETIC TAPES
MATHEMATICS
MEMORY DEVICES
MORPHOLOGY
RADIATIONS
SOLAR ACTIVITY
SOLAR ATMOSPHERE
SOLAR CORONA
SOLAR FLARES
STELLAR ATMOSPHERES
STELLAR CORONAE
TOPOLOGY
VIDEO TAPES
VISIBLE RADIATION
X RADIATION