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Ubiquitous High Speed Transition Region and Coronal Upflows in the Quiet Sun
Scott W. Mcintosh, Bart De Pontieu
We study the line profiles of a range of transition region (TR) emission lines observed in typical quiet Sun regions. In magnetic network regions, the Si IV 1402Å, C IV 1548Å, N V…
Observing Episodic Coronal Heating Events Rooted in Chromospheric Activity
Scott W. McIntosh, Bart De Pontieu
We present results of a multi-wavelength study of episodic plasma injection into the corona of AR 10942. We exploit long-exposure images of the Hinode and Transition Region and Cor…
On-disk counterparts of type II spicules in the Ca II 854.2 nm and Halpha lines
L. Rouppe van der Voort, J. Leenaarts, B. de Pontieu +2
Recently a second type of spicules was discovered at the solar limb with the Solar Optical Telescope (SOT) onboard the Japanese Hinode spacecraft. These previously unrecognized typ…
On the propagation of p-modes into the solar chromosphere
A. G. de Wijn, S. W. McIntosh, B. De Pontieu
We employ tomographic observations of a small region of plage to study the propagation of waves from the solar photosphere to the chromosphere using a Fourier phase-difference anal…
Estimating the Chromospheric Absorption of Transition Region Moss Emission
Bart De Pontieu, Viggo H. Hansteen, Scott W. McIntosh +1
Many models for coronal loops have difficulty explaining the observed EUV brightness of the transition region, which is often significantly less than theoretical models predict. Th…
Observing the Roots of Solar Coronal Heating - in the Chromosphere
Bart De Pontieu, Scott W. McIntosh, Viggo H. Hansteen +1
The Sun's corona is millions of degrees hotter than its 5,000 K photosphere. This heating enigma is typically addressed by invoking the deposition at coronal heights of non-thermal…