4 papers · 1 filter
The Signature of Flares in VIRGO Total Solar Irradiance Measurements
A. Quesnel, B. R. Dennis, B. Fleck +2
We use Total Solar Irradiance (TSI) measurements from the VIRGO (Variability of solar IRradiance and Gravity Oscillations) instrument on board SOHO to obtain preliminary estimates…
On the Role of Acoustic-gravity Waves in the Energetics of the Solar Atmosphere
Thomas Straus, Bernhard Fleck, Stuart M. Jefferies +4
In a recent paper (Straus et al. 2008) we determined the energy flux of internal gravity waves in the lower solar atmosphere using a combination of 3D numerical simulations and obs…
On the detection of fast moving upflows in the quiet solar photosphere
T. Straus, B. Fleck, S. M. Jefferies +2
In our studies of the dynamics and energetics of the solar atmosphere, we have detected, in high-quality observations from Hinode SOT/NFI, ubiquitous small-scale upflows which move…
High frequency waves in the solar atmosphere?
B. Fleck, T. Straus, M. Carlsson +3
The present study addresses the following questions: How representative of the actual velocities in the solar atmosphere are the Doppler shifts of spectral lines? How reliable is t…