High-resolution X-ray spectra of solar flares. VIII - Mass upflow in the large flare of 1980 November 7

Abstract

view Abstract Citations (29) References (30) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS High-Resolution X-Ray Spectra of Solar Flares. VIII. Mass Upflow in the Large Flare of 1980 November 7 Karpen, J. T. ; Doschek, G. A. ; Seely, J. F. Abstract The large flare of November 7, 1980 provides a unique opportunity to investigate the upward-moving plasma seen during the early stages of many flares. Soft X-ray spectroscopic data obtained by the Solar Flare X-ray (SOLFLEX) instruments on board the Air Force P78-1 satellite have been used to determine the spatial extent, turbulent velocity, temperature, and emission measure of the blueshifted and stationary plasmas, as well as the upward velocity of the blueshifted component alone. Two geometries are considered in calculating the resultant mass and energy balance. In addition, coincident hard X-ray data was acquired from the HXRBS instrument on board the SMM satellite to determine the relative timing and enertics of the hard and soft X-ray flare plasmas. These results are compared with the predictions of the chromospheric evaporation hypothesis. It is concluded that electron-induced evaporation plays a minor role in this flare, and that another mechanism must account for the observed blueshifted emission. Publication: The Astrophysical Journal Pub Date: July 1986 DOI: 10.1086/164346 Bibcode: 1986ApJ...306..327K Keywords: Atmospheric Circulation; Mass Flow; Solar Atmosphere; Solar Flares; Solar X-Rays; X Ray Spectra; High Resolution; Spaceborne Astronomy; Astrophysics; SUN: ATMOSPHERIC MOTIONS; SUN: FLARES; SUN: X-RAYS; X-RAYS: SPECTRA full text sources ADS | Related Materials (8) Part 1: 1979ApJ...233L.157D Part 2: 1980ApJ...238..365F Part 3: 1980ApJ...239..725D Part 4: 1980ApJ...241.1175F Part 5: 1981ApJ...245..315D Part 6: 1982ApJ...260..885F Part 7: 1985ApJ...292..309K Part 9: 1989ApJ...345.1079D