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Observations of Active Region Loops with the EUV Imaging Spectrometer on Hinode
Harry P. Warren, Ignacio Ugarte-Urra, George A. Doschek +2
Previous solar observations have shown that coronal loops near 1 MK are difficult to reconcile with simple heating models. These loops have lifetimes that are long relative to a ra…
Observations of Solar Doppler Shift Oscillations with the EUV Imaging Spectrometer on Hinode
John T. Mariska, Harry P. Warren, David R. Williams +1
Damped Doppler shift oscillations have been observed in emission lines from ions formed at flare temperatures with the Solar Ultraviolet Measurements of Emitted Radiation spectrome…
Modeling X-ray Loops and EUV "Moss" in an Active Region Core
A. R Winebarger, H. P. Warren, D. A. Falconer
The Soft X-ray intensity of loops in active region cores and corresponding footpoint, or moss, intensity observed in the EUV remain steady for several hours of observation. The ste…
Velocity Structure of Jets in Coronal Hole
Suguru Kamio, Hirohisa Hara, Tetsuya Watanabe +4
Velocity structures of jets in a coronal hole have been derived for the first time. Hinode observations revealed the existence of many bright points in coronal holes. They are loop…
On connecting the dynamics of the chromosphere and transition region with Hinode SOT and EIS
Viggo H. Hansteen, Bart De Pontieu, Mats Carlsson +14
We use coordinated Hinode SOT/EIS observations that include high-resolution magnetograms, chromospheric and TR imaging and TR/coronal spectra in a first test to study how the dynam…
Observations of Transient Active Region Heating with Hinode
Harry P. Warren, Ignacio Ugarte-Urra, David H. Brooks +3
We present observations of transient active region heating events observed with the Extreme Ultraviolet Imaging Spectrometer (EIS) and X-ray Telescope (XRT) on Hinode. This initial…
Observation and Modeling of Coronal "Moss" With the EUV Imaging Spectrometer on Hinode
Harry P. Warren, Amy R. Winebarger, John T. Mariska +2
Observations of transition region emission in solar active regions represent a powerful tool for determining the properties of hot coronal loops. In this Letter we present the anal…
Hinode EUV Imaging Spectrometer Observations of Solar Active Region Dynamics
John T. Mariska, Harry P. Warren, Ignacio Ugarte-Urra +3
The EUV Imaging Spectrometer (EIS) on the Hinode satellite is capable of measuring emission line center positions for Gaussian line profiles to a fraction of a spectral pixel, resu…
The Magnetic Topology of Coronal Mass Ejection sources
I. Ugarte-Urra, H. P. Warren, A. R. Winebarger
In an attempt to test current initiation models of coronal mass ejections (CMEs), with an emphasis on the magnetic breakout model, we inspect the magnetic topology of the sources o…
Static and Dynamic Modeling of a Solar Active Region. I: Soft X-Ray Emission
Harry P. Warren, Amy R. Winebarger
Recent simulations of solar active regions have shown that it is possible to reproduce both the total intensity and the general morphology of the high temperature emission observed…
Hydrostatic Modeling of the Integrated Soft X-Ray and EUV Emission in Solar Active Regions
Harry P. Warren, Amy R. Winebarger
Many studies of the solar corona have shown that the observed X-ray luminosity is well correlated with the total unsigned magnetic flux. In this paper we present results from the e…
Multi-Thread Hydrodynamic Modeling of a Solar Flare
Harry P. Warren
Past hydrodynamic simulations have been able to reproduce the high temperatures and densities characteristic of solar flares. These simulations, however, have not been able to acco…
Cooling Active Region Loops Observed With SXT and TRACE
Amy R. Winebarger, Harry P. Warren
An Impulsive Heating Multiple Strand (IHMS) Model is able to reproduce the observational characteristics of EUV (~ 1 MK) active region loops. This model implies that some of the lo…
A new Method to Constrain the Iron Abundance from Cooling Delays in Coronal Loops
Markus J. Aschwanden, C. J. Schrijver, A. R. Winebarger +1
Recent observations with TRACE reveal that the time delay between the appearance of a cooling loop in different EUV temperature filters is proportional to the loop length, dt_12 ~…