Radio data and a theoretical model for the fast-mode MHD shock wave generated by the solar flare of 1973 September 5, 18:26 UT

Journal Article · Wed Aug 01 04:00:00 EDT 1979 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/157257· OSTI ID:5874016

Dryer, M; Maxwell, A

Data on the solar radio burst of spectral type II generated by the solar flare of 1973 September 5, 18:26 UT are analyzed, and the radial velocity of the shock wave that gave rise to the radio burst is estimated at about 1100 km s/sup -1/. This estimate is critically dependent on the model assumed for electron density above the flare region, and existing density models are therefore reviewed. Radio data on the shock are then compared with a theoretical model for the propagation of a fast-mode magnetohydrodynamic (MHD) shock through the corona. The simulated magnetic, velocity, and thermodynamic parameters for the global coronal mass motion are presented. The input function used for the shock model is a square-wave pulse, of duration 10 minutes, containing a temperature increase of 40 times the ambient value. The energy in this pulse is 2 x 10/sup 32/ ergs and the ejected mass, as indicated by the MHD simulation, is 6.4 x 10/sup 16/ g.

• Research Organization: Space Environment Laboratory, NOAA-ERL, Boulder
• OSTI ID: 5874016
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 231:3; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640104* -- Astrophysics & Cosmology-- Solar Phenomena
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ELECTROMAGNETIC RADIATION
ELECTRON DENSITY
EMISSION SPECTRA
FLUID MECHANICS
HYDRODYNAMICS
MAGNETOHYDRODYNAMICS
MATHEMATICAL MODELS
MECHANICS
RADIAL VELOCITY
RADIATIONS
RADIOWAVE RADIATION
SHOCK WAVES
SOLAR ACTIVITY
SOLAR CORONA
SOLAR FLARES
SOLAR RADIATION
SOLAR RADIO BURSTS
SOLAR RADIOWAVE RADIATION
SPECTRA
STAR MODELS
VELOCITY