Morphology and velocity field of the large flare on the solar disc on July 14, 1980

Conference · Fri Jan 01 04:00:00 EST 1982 · Adv. Space Res.; (United States)

OSTI ID:6400310

Xuan, J ^[1]; Li, Z

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1. Astronomical Observatory, Kunming, People's Republic of China

The active region morphology and the features of solar radio bursts and the sight-line velocity distribution of a flare of importance 3B on the solar disk (AR 2562) on July 14, 1980, are discussed. The preliminary analysis made here suggests that measurement of the velocity fields of active regions is important in treating flare mechanisms. It is noted that a few hours before the eruption of the flare, the penumbral fibers of the sunspots on the corresponding photospheric part under the flare rapidly attenuated. It is thought that the instability of the flare may derive from the rapid changes occurring in the magnetic boundary conditions of the photosphere. These in turn denote the rapid emergence, subsidence, or dissipation of the magnetic flux. The spectra of the active filament in the later period of the flare are seen as indicating that most of the ejection matter was rolling, in addition to ascending or descending.

• OSTI ID: 6400310
• Report Number(s): CONF-820582-
• Conference Information: Journal Name: Adv. Space Res.; (United States) Journal Volume: 2
• Country of Publication: United States
• Language: English

Related Subjects

640104* -- Astrophysics & Cosmology-- Solar Phenomena
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ATMOSPHERES
BALMER LINES
ELECTROMAGNETIC RADIATION
MAGNETIC FIELDS
MAGNETIC FLUX
MORPHOLOGY
PHOTOSPHERE
RADIATIONS
RADIOWAVE RADIATION
SOLAR ACTIVITY
SOLAR ATMOSPHERE
SOLAR FLARES
SOLAR PROMINENCES
SOLAR RADIO BURSTS
STARSPOTS
SUNSPOTS