Chromospheric limb spectra from SKYLAB - 2000 to 3200 A

Details Chromospheric limb spectra from SKYLAB - 2000 to 3200 A Chromospheric limb spectra from SKYLAB - 2000 to 3200 A

Jan 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977apjs...33..101d&link_type=abstract

Astrophysical Journal Supplement Series, vol. 33, Jan. 1977, p. 101-111. NASA-supported research.

Astronomy and Astrophysics

Astronomy

65

Chromosphere, Solar Spectra, Spaceborne Astronomy, Spectrum Analysis, Ultraviolet Spectra, Ions, Solar Spectrometers, Spectral Line Width, Tables (Data)

Scientific paper

Chromospheric limb spectra of a quiet-sun region between 2000 and 3200 A recorded by the normal-incidence spectrograph on Skylab are discussed. The spectral resolution is 0.12 A, and the projected slit area on the sun is 2 by 60 arcsec. A list of lines with wavelengths, identifications, and absolute intensities is given for the spectrum recorded at +4 arcsec outside the white-light limb. The intensity behavior outside the limb is shown for lines of the ions C II, Si II, Cr II, Mn II, Fe II, Fe III, Co II, and Ni II. The widths of the intersystem lines of Si II and C II increase monotonically with height above the limb. The full width at half-maximum of the Si II lines increases from 0.034 A at the limb to 0.27 A at +12 arcsec above the limb. The widths of the C II lines increase from 0.17 A at +2 arcsec to 0.31 A at +12 arcsec.

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