Study of Solar He II 30.4 nm Pulsations

Details Study of Solar He II 30.4 nm Pulsations Study of Solar He II 30.4 nm Pulsations

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmsh13a1508g&link_type=abstract

American Geophysical Union, Fall Meeting 2008, abstract #SH13A-1508

Physics

7536 Solar Activity Cycle (2162), 7537 Solar And Stellar Variability (1650), 7538 Solar Irradiance, 7549 Ultraviolet Emissions

Scientific paper

Pulsations of solar He II 30.4 nm, the dominant contributor of the solar Extreme Ultraviolet (EUV) flux, have been studied using Solar and Heliospheric Observatory (SOHO) based Charge, Element and Isotope Analysis System/Solar EUV Monitor (CELIAS/SEM) 26-34 nm EUV data. We computed solar He II 30.4 nm pulsation parameters (amplitudes and frequencies) of more than 100 pulsations observed between 2001 and 2007 using the least squares method. The solar cycle dependence of these pulsations has been studied and will be presented. Possible physical mechanisms powering these pulsations will be discussed.

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