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

Abstract

view Abstract Citations (23) References (14) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Temporal and spatial fluctuations in strengths and widths of C IV and SI II lines observed with OSO 8 Athay, R. G. ; White, O. R. 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. Publication: The Astrophysical Journal Pub Date: August 1980 DOI: 10.1086/158234 Bibcode: 1980ApJ...240..306A Keywords: 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; Solar Physics full text sources ADS |