Chromospheric oscillations observed with OSO 8. I - Basic measurements and analytical methods.

Abstract

view Abstract Citations (25) References (12) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Chromospheric oscillations observed with OSO 8. I. Basic measurements and analytical methods. White, O. R. ; Athay, R. G. Abstract Time series of solar EUV line profiles observed with OSO 8 have fluctuations arising from instrumental, satellite, and solar sources. The fluctuations are partly noiselike, partly from long-term drifts, and partly from periodic oscillations. The Sun contributes to all three types of fluctuations. However, instrumental effects also contribute to the noiselike fluctuations and long-term drifts, and the satellite wheel rotation induces spurious oscillations. Analytical procedures are discussed for applying Fourier transform techniques and related statistical tests to isolate the different types of fluctuations and, in particular, to study the solar oscillations. Strong solar oscillations are identified near 3 mHz, and aliases of the wheel rotation frequency are identified at 10.5 and 27 mHz. Publication: The Astrophysical Journal Supplement Series Pub Date: March 1979 DOI: 10.1086/190573 Bibcode: 1979ApJS...39..317W Keywords: Chromosphere; Oso-8; Satellite Observation; Solar Atmosphere; Solar Oscillations; Far Ultraviolet Radiation; Line Spectra; Power Spectra; Satellite Rotation; Solar Spectra; Time Series Analysis; Ultraviolet Astronomy; Solar Physics; Line Profiles:Solar Chromosphere; Oscillations:Solar Chromosphere; Solar Chromosphere:UV Spectra full text sources ADS |