Solar luminosity variation. V - The photospheric lines, 1976-1985

Details Solar luminosity variation. V - The photospheric lines, 1976-1985 Solar luminosity variation. V - The photospheric lines, 1976-1985

Mar 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...314..808l&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 314, March 15, 1987, p. 808-816.

Other

13

Line Spectra, Photosphere, Solar Spectra, Stellar Luminosity, Iron, Metallicity, Solar Maximum Mission, Spectral Line Width, Stellar Spectrophotometry

Scientific paper

Kitt Peak full-disk spectrophotometric records for selected spectrum lines observed during the period 1976-1985 are analyzed using improved corrections for water vapor and an instrument slit change. The equivalent width of the ground state line of Mn I 5394.7 A shows the greatest variability and correlates well with Ca K 3933 A intensity. Temperature-sensitive C I 5380.3 A, after some apparently nonthermal activity in 1976-1978, settles down to a near constant level. The equivalent widths of other lines show little or no change with time. Evidence is presented that the source of the variability in Mn I 5394.7 A is not confined to solar plage regions alone. The annual means in the central depth of C I 5380.3 A, interpreted as indicative of fluctuations in T(eff), show a peak-to-peak variation of 0.7 K over 1979-1985.

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