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The Spectroscopic Signature of Quasi-periodic Upflows in Active Region Timeseries
Hui Tian, Scott W. McIntosh, Bart De Pontieu
Quasi-periodic propagating disturbances are frequently observed in coronal intensity image sequences. These disturbances have historically been interpreted as being the signature o…
The Spectroscopic Footprint of the Fast Solar Wind
Scott W. McIntosh, Robert J. Leamon, Bart De Pontieu
We analyze a large, complex equatorial coronal hole (ECH) and its immediate surroundings with a focus on the roots of the fast solar wind. We start by demonstrating that our ECH is…
Quasi-periodic Propagating Signals in the Solar Corona: The Signature of Magnetoacoustic Waves or High-Velocity Upflows?
Bart De Pontieu, Scott W. McIntosh
Since the discovery of quasi-periodic propagating oscillations with periods of order three to ten minutes in coronal loops with TRACE and EIT (later with EUVI and EIS), they have b…
STEREO quadrature observations of coronal dimming at the onset of mini-CMEs
Davina Innes, Scott McIntosh, Anna Pietarila
Context: Using unique quadrature observations with the two STEREO spacecraft, we investigate coronal dimmings at the onset of small-scale eruptions. In CMEs they are believed to in…
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…
STEREO Observations of Quasi-Periodically Driven High Velocity Outflows in Polar Plumes
Scott W. McIntosh, Davina E. Innes, Bart De Pontieu +1
Plumes are one of the most ubiquitous features seen at the limb in polar coronal holes and are considered to be a source of high density plasma streams to the fast solar wind. We a…