Temporal and spatial fluctuations in strengths and widths of C IV and SI II lines observed with OSO 8

Details Temporal and spatial fluctuations in strengths and widths of C IV and SI II lines observed with OSO 8 Temporal and spatial fluctuations in strengths and widths of C IV and SI II lines observed with OSO 8

Publishing date

Aug 1980

URL

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...240..306a&link_type=abstract

Journals

Astrophysical Journal, Part 1, vol. 240, Aug. 15, 1980, p. 306-321.

Science

Astronomy and Astrophysics

Field

Astrophysics

Additional info 2

18

Additional info 3

Carbon, Periodic Variations, Silicon, Solar Spectra, Spectral Energy Distribution, Spectral Line Width, Ultraviolet Spectra, Extreme Ultraviolet Radiation, Faculae, Oso-8, Solar Atmosphere, Solar Corona, Spectral Resolution, Statistical Analysis, Stellar Models, White Noise

Type

Scientific paper

Abstract

The spatial and temporal fluctuations in widths and strengths are examined for three EUV lines: C IV, wavelength 1548 and Si II, wavelengths 1816.93 and 1817.45 observed with an effective aperture of 2 x 20 arcsec and with time resolution less than 30 s. Three classes of fluctuations with substantial amplitude are identified: (1) short term fluctuations with a characteristic fluctuation time near 5 min, (2) intermediate term fluctuations with a characteristic time of 30 min or longer, and (3) large scale spatial fluctuations associated with supergranule cell, network, and plage structure.

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