110 citations · 319 across the 8 of their papers we have counts for
6 papers · 1 filter
Are Non-thermal Velocities in Active Region Coronal Loops Anisotropic?
Michael Hahn, Mahboubeh Asgari-Targhi, Daniel Wolf Savin
We have measured line widths in active region coronal loops in order to determine whether the non-thermal broadening is anisotropic with respect to the magnetic field direction. Th…
Evidence for Parameteric Decay Instability in the Lower Solar Atmosphere
Michael Hahn, Xiangrong Fu, Daniel Wolf Savin
We find evidence for the first observation of the parametric decay instability (PDI) in the lower solar atmosphere. Specifically, we find that the power spectrum of density fluctua…
Critical Science Plan for the Daniel K. Inouye Solar Telescope (DKIST)
Mark P. Rast, Nazaret Bello González, Luis Bellot Rubio +84
The Daniel K. Inouye Solar Telescope (DKIST) will revolutionize our ability to measure, understand and model the basic physical processes that control the structure and dynamics of…
Inferring the Coronal Density Irregularity from EUV Spectra
Michael Hahn, Daniel Wolf Savin
Understanding the density structure of the solar corona is important for modeling both coronal heating and the solar wind. Direct measurements are difficult because of line-of-sigh…
Observational Quantification of the Energy Dissipated by Alfvén Waves in a Polar Coronal Hole: Evidence that Waves Drive the Fast Solar Wind
Michael Hahn, Daniel W. Savin
We present a measurement of the energy carried and dissipated by Alfvén waves in a polar coronal hole. Alfvén waves have been proposed as the energy source that heats the corona an…
Evidence of Wave Damping at Low Heights in a Polar Coronal Hole
Michael Hahn, Enrico Landi, Daniel Wolf Savin
We have measured the widths of spectral lines from a polar coronal hole using the Extreme Ultraviolet Imaging Spectrometer onboard Hinode. Polar coronal holes are regions of open m…