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Evidence for Steady Heating: Observations of an Active Region Core with Hinode and TRACE
Harry P. Warren, Amy R. Winebarger, David H. Brooks
Previous observations have not been able to exclude the possibility that high temperature active region loops are actually composed of many small scale threads that are in various…
Hinode/Extreme-Ultraviolet Imaging Spectrometer Observations of the Temperature Structure of the Quiet Corona
David H. Brooks, Harry P. Warren, David R. Williams +1
We present a Differential Emission Measure (DEM) analysis of the quiet solar corona on disk using data obtained by the Extreme-ultraviolet Imaging Spectrometer (EIS) on {\it Hinode…
Flows and Motions in Moss in the Core of a Flaring Active Region: Evidence for Steady Heating
David H. Brooks, Harry P. Warren
We present new measurements of the time variability of intensity, Doppler and non-thermal velocities in moss in an active region core observed by the EUV Imaging Spectrometer on Hi…
Modeling Evolving Coronal Loops with Observations from STEREO, Hinode, and TRACE
Harry P. Warren, David M. Kim, Amanda M. DeGiorgi +1
The high densities, long lifetimes, and narrow emission measure distributions observed in coronal loops with apex temperatures near 1 MK are difficult to reconcile with physical mo…
Hot Plasma in Non-Flaring Active Regions Observed by the Extreme-ultraviolet Imaging Spectrometer on Hinode
Yuan-Kuen Ko, George A. Doschek, Harry P. Warren +1
The Extreme-ultraviolet Imaging Spectrometer (EIS) on the Hinode spacecraft obtains high resolution spectra of the solar atmosphere in two wavelength ranges: 170 - 210 and 250 - 29…
Active region transition region loop populations and their relationship to the corona
Ignacio Ugarte-Urra, Harry P. Warren, David H. Brooks
The relationships among coronal loop structures at different temperatures is not settled. Previous studies have suggested that coronal loops in the core of an active region are not…
The Temperature and Density Structure of the Solar Corona. I. Observations of the Quiet Sun with the EUV Imaging Spectrometer (EIS) on Hinode
Harry P. Warren, David H. Brooks
Measurements of the temperature and density structure of the solar corona provide critical constraints on theories of coronal heating. Unfortunately, the complexity of the solar at…