Observations of the 1980 April 30 limb flare by the ultraviolet spectrometer and polarimeter on the Solar Maximum Mission

Abstract

view Abstract Citations (29) References (13) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Observations of the 1980 April 30 limb flare by the ultraviolet spectrometer and polarimeter on the Solar Maximum Mission Woodgate, B. E. ; Shine, R. A. ; Brandt, J. C. ; Chapman, R. D. ; Michalitsianos, A. G. ; Kenny, P. J. ; Bruner, E. C. ; Rehse, R. A. ; Schoolman, S. A. ; Cheng, C. C. Abstract Observations of the M2 limb flare of 1980 April 30 by the ultraviolet spectrometer and polarimeter in the C IV 1548 A line are described and compared with observations from other SMM instruments and with ground-based H-alpha data. Events observed during the 18 minutes leading up to the flare impulsive phase include the filling of a small loop with material moving at about 20 km/s, followed by a rapid brightening in C IV, H-alpha, and hard X-rays, with a subsequent brightening of a higher set of loops. The rapid brightening appears to be at the junction of the small loop with the overlying magnetic structures, which suggests the flare may be caused by their interaction. Publication: The Astrophysical Journal Pub Date: March 1981 DOI: 10.1086/183497 Bibcode: 1981ApJ...244L.133W Keywords: Solar Flares; Solar Limb; Solar Magnetic Field; Solar Maximum Mission; Solar Spectra; Ultraviolet Astronomy; H Alpha Line; Polarimeters; Solar Instruments; Solar X-Rays; Ultraviolet Spectrometers; Solar Physics full text sources ADS |