National Aeronautics and Space Administration

Living With A Star

Targeted Research and Technology

Coronal Heating Origins of the Solar Spectral Irradiance

ROSES ID: NNH06ZDA001N      Selection Year: 2007      

Program Element: Focused Science Topic

Principal Investigator: James Klimchuk

Affiliation(s): Naval Research Laboratory

Project Member(s):
dahlburg, russell b Collaborator Naval Research Laboratory
Schrijver, Carolus J Collaborator Lockheed Martin Space Systems Company
Linker, Jon A Co-I Predictive Science, Inc.
DeVore, C Richard Collaborator NASA Goddard Space Flight Center


We will develop a new class of realistic physics-based models of active regions and the global Sun, which will be the predecessors of operational space weather models for predicting the soft X-ray and UV spectral irradiance. Impulsive coronal heating is a fundamental feature of these models. By determining the values of key coronal heating parameters that best reproduce a variety of imaging and irradiance observations, we will gain important physical insights about the nature of the heating mechanism. At the same time, we will continue our detailed investigation of the secondary instability of electric current sheets, which we feel is the most promising of the mechanisms so far proposed. We will perform sophisticated 3D MHD simulations that treat the instability in a far more realistic manner than before. Knowledge gained will be incorporated into the active region and global Sun models to further improve their realism.


Performance YearReferenceInvestigation TypeActions
1Klimchuk, J. A., Patsourakos, S., & Cargill, P. A. 2008, "H...
not set
1Patsourakos, S. & Klimchuk, J. A. 2008, "Static and Impulsi...
not set


Performance YearReferenceActions
1Klimchuk, James A.; DeVore, C. R.; (2007), Energy Relea...

Export to PDF