Evidence of Enhanced High Frequency Velocity Oscillations in the Sun Observed During Solar Flare Using Disk Integrated Doppler Signals

Details Evidence of Enhanced High Frequency Velocity Oscillations in the Sun Observed During Solar Flare Using Disk Integrated Doppler Signals Evidence of Enhanced High Frequency Velocity Oscillations in the Sun Observed During Solar Flare Using Disk Integrated Doppler Signals

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aspc..416..333k&link_type=abstract

Solar-Stellar Dynamos as Revealed by Helio- and Asteroseismology: GONG 2008/SOHO 21 ASP Conference Series, Vol. 416, proceedings

Astronomy and Astrophysics

Astronomy

1

Scientific paper

Disk integrated velocity signals at the solar surface obtained from Global Oscillation Network Group (GONG) full-disk Dopplergrams have been used to study the flare-induced velocity oscillations during the major solar flare (X17.6/4B) of 28 October 2003. We observe that these velocity oscillations are enhanced significantly during the flare in the higher frequency band (5-6.5 mHz) while there is feeble or no enhancement of these oscillations in lower frequency band (2-4 mHz). We also observe the presence of high frequency power in these velocity oscillations of the Sun comparable to granulation power even in non-flaring condition.

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