The cooling of flare produced plasmas in the solar corona

Solar flare X-rays, at energies less than 10 keV, are emitted by hot plasmas located in the corona. Three plasma cooling models are examined in detail. The cooling of the electrons by Coulomb collisions with ions at a lower temperature would require the observed material to occupy very large volumes. Cooling could take place by conduction or by radiation and observations are proposed which would allow the dominant cooling mechanism to be established.

[1]  W P Reidy,et al.  X-ray Structures of the Sun during the Importance 1N Flare of 8 June 1968 , 1968, Science.

[2]  H. Hudson,et al.  THE HARD SOLAR X-RAY SPECTRUM OBSERVED FROM THE THIRD ORBITING SOLAR OBSERVATORY. , 1969 .

[3]  A. H. Gabriel,et al.  Interpretation of Solar Helium-Like Ion Line Intensities , 1969 .

[4]  J. Culhane,et al.  Solar X-ray bursts at energies less than 10 keV observed with OSO-4 , 1970 .

[5]  J. Culhane.  Thermal Continuum Radiation from Coronal Plasmas at Soft X-ray Wavelengths , 1969 .

[6]  W. A. White,et al.  X-ray and extreme ultraviolet (1–400 Å) spectroscopy of the sun, from OSO-III , 1969 .

[7]  I. Beigman,et al.  On the localization, size and structure of the regions of the X-ray flares on the Sun , 1969 .

[8]  R. Kreplin,et al.  X-Ray Line and Continuum Spectra of Solar Flares from 0.5 to 8.5 Angstroms , 1968, Science.

[9]  L. Spitzer.  Physics of fully ionized gases , 1956 .

[10]  S. Kane.  Observations of two components in energetic solar X-ray bursts. , 1969 .

[11]  G. Doschek,et al.  The helium-like calcium, silicon, and sulfur lines during the decay of a large flare , 1970 .

[12]  R. Batstone,et al.  Further X-ray spectra of solar active regions , 1970 .

[13]  J. Blades,et al.  A Proportional Counter Spectrometer for the Study of the Solar Soft X-Ray Spectrum , 1967 .

[14]  K. Frost.  Rapid fine structure in a burst of hard solar X-rays observed by OSO-5 , 1969 .

[15]  R. Latter,et al.  Electron Radiative Transitions in a Coulomb Field , 1961 .

[16]  Donald P. Cox,et al.  Ionization equilibrium and radiative cooling of a low-density plasma. , 1969 .