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Two components of the coronal emission revealed by EUV spectroscopic observations
Hui Tian, Scott W. McIntosh, Bart De Pontieu +3
Recent spectroscopic observations have revealed the ubiquitous presence of blueward asymmetries of emission lines formed in the solar corona and transition region. These asymmetrie…
Observation of High-speed Outflow on Plume-like Structures of the Quiet Sun and Coronal Holes with SDO/AIA
Hui Tian, Scott W. McIntosh, Shadia Rifal Habbal +1
Observations from the Atmospheric Imaging Assembly (AIA) onboard the Solar Dynamics Observatory (SDO) reveal ubiquitous episodic outflows (jets) with an average speed around 120 km…
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…
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…
Interactions between reversed granulation, p-modes, and magnetism?
Alfred G. de Wijn, Scott W. McIntosh, Bart De Pontieu
We investigate features that are observed in Ca ii H sequences from Hinode in places where reversed granulation seems to interact with p-modes. These features appear ubiquitously i…