Accession Number : AD0607860

Title :   A STUDY OF THE FINE STRUCTURES IN THE SOLAR CHROMOSPHERE.

Descriptive Note : Environmental Research Papers,

Corporate Author : SACRAMENTO PEAK OBSERVATORY SUNSPOT N MEX

Personal Author(s) : Beckers,J. M.

Report Date : SEP 1964

Pagination or Media Count : 137

Abstract : The main part of the paper is concerned with a spectroheliographic study in the light of the Hydrogen H-alpha line (6562.8A) and of the Calcium K line (3933.7A). A description is given of the instrumentation used to secure the observations. Some of the properties of the Sydney 1/8 A H-alpha birefringent filter are given in detail. A description is given of the high-resolution H-alpha filtergrams obtained with this instrument with a comparison of this description with those given by other authors. The elongated fine mottles were studied in considerable detail. All of the properties agree with those for spicules. An attempt was made to measure the spectrum of such a spicule on the disk. The hydrogen spectrum of spicules was computed under non-local thermodynamic equilibrium conditions for the Lyman alpha, beta and gamma lines, the Balmer alpha and beta lines, and the Paschen alpha line. The appearance of the K spectroheliograms are described. Attention is drawn to the equality in birth rates for granules and spicules within the K flocculi, which indicates a physical relationship.

Descriptors :   (*SOLAR ATMOSPHERE, ASTRONOMY), SOLAR DISTURBANCES, SUNSPOTS, OPTICAL FILTERS, SPECTROSCOPY, DOPPLER EFFECT, ATOMIC ENERGY LEVELS, HYDROGEN, CALCIUM

Distribution Statement : APPROVED FOR PUBLIC RELEASE