Lyman-alpha rocket spectra and models of the quiet and active solar chromosphere based on partial redistribution diagnostics

Details Lyman-alpha rocket spectra and models of the quiet and active solar chromosphere based on partial redistribution diagnostics Lyman-alpha rocket spectra and models of the quiet and active solar chromosphere based on partial redistribution diagnostics

Jun 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...230..924b&link_type=abstract

Astrophysical Journal, Part 1, vol. 230, June 15, 1979, p. 924-949.

Astronomy and Astrophysics

Astrophysics

137

Chromosphere, Lyman Alpha Radiation, Lyman Spectra, Solar Activity, Solar Spectra, Spectral Energy Distribution, Ultraviolet Spectra, Astronomical Models, Calibrating, Distribution Functions, Flow Velocity, Limbs, Radiative Transfer, Spectral Resolution, Sunspots, Temperature Distribution

Scientific paper

Absolute intensity Lyman-alpha profiles with a spatial resolution of 0.8 min and a spectral resolution of 50 mA were obtained for network and cell regions in the quiet sun, umbral and penumbral areas of a sunspot, two plages, and a quiescent prominence of the limb. Weak limb brightening shown by the Lyman-alpha cores and wings are consistent with predictions derived from partial redistribution line transfer calculations. Through use of a comoving two-level partial redistribution code which conserves mass flux, unequal red and blue Lyman-alpha peak intensities may be interpreted as flow velocities near 20,000 K. Outflows in the plages and downflows in the network are also noted. A model of a mean quiet sun chromosphere consistent with the Lyman-alpha integrated intensity, the Lyman continuum slope, and the millimeter continuum is presented.

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