Astronomy and Astrophysics – Astronomy
Scientific paper
May 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009spd....40.0927f&link_type=abstract
American Astronomical Society, SPD meeting #40, #9.27; Bulletin of the American Astronomical Society, Vol. 41, p.821
Astronomy and Astrophysics
Astronomy
Scientific paper
Phase difference spectra between the velocity signals at two different heights represent a powerful tool to study the propagation characteristics of acoustic-gravity waves in the solar atmosphere. In our efforts to study the dynamics and energetics of these waves we have acquired high-resolution, high-cadence time series with Hinode SOT/NFI at two different levels in the Mg b2 or Na D1 lines. The observed phase spectra between the velocity signals derived from the "wing" and "core" filtergrams of these lines do not show the expected behavior. This points to (a) a fundamental lack of understanding of the propagation characteristics of acoustic waves, which may be more complex than commonly assumed, or (b) significant difficulties in interpreting filtergrams taken at fixed wavelengths in the wings of an absorption line, possibly limiting the diagnostic potential of Doppler "velocity" measurements from such filtergrams. The present work aims at disentangling these effects with the help of numerical simulations.
Fleck Bernard
Jefferies Stuart M.
Severino Giuseppe
Straus Th.
Tarbell Ted D.
No associations
LandOfFree
On The Interpretation Of Hinode NFI Filtergrams does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with On The Interpretation Of Hinode NFI Filtergrams, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and On The Interpretation Of Hinode NFI Filtergrams will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1112103