Accession Number : AD0642575

Title :   MEASUREMENTS OF THE CENTER-LIMB VARIATIONS ON THE H- AND K- LINES OF CAII IN UNDISTURBED AND ACTIVE REGIONS ON THE SUN,

Corporate Author : OSLO UNIV (NORWAY) INST OF THEORETICAL ASTROPHYSICS

Personal Author(s) : Engvold,Oddbjoern

Report Date : 1966

Pagination or Media Count : 12

Abstract : The center-limb variation of delta(lambda-2), defined as half the distance between the emission peaks in the doubly reversed H- and K- lines was investigated. The observational material consists of spectra obtained at the Solar Observatory, Harestua, during the period February 1, 1964 to January 1, 1966. In undisturbed regions the center-limb variation may be represented by a well defined smooth curve. This is not the case in active regions although there is a tendency for the delta(lambda-2) to increase towards the limb. The difference between the measurements in the H- and K- lines is probably due to a systematic error in the observed delta(lambda-2) in the H-line. (Author)

Descriptors :   (*SOLAR SPECTRUM, MEASUREMENT), LINE SPECTRA, EMISSIVITY, SOLAR DISTURBANCES, CHROMOSPHERE, NORWAY

Subject Categories : Astrophysics

Distribution Statement : APPROVED FOR PUBLIC RELEASE