Physics-based Modeling of Emission in Active Regions
ROSES ID: NNH06ZDA001N Selection Year: 2007
Program Element: Focused Science Topic
Principal Investigator: Roberto Lionello
Affiliation(s): Science Applications International Corporation
Project Member(s):
Linker, Jon A Co-I Predictive Science, Inc.
Klimchuk, James A Co-I NASA Goddard Space Flight Center
Summary:
The structure and dynamics of active region magnetic fields play a crucial
role in the production of EUV and X-ray emission from the Sun. A key
impediment to a more comprehensive understanding and prediction of this
emission has been that models of active region magnetic fields based on real
data (e.g., nonlinear force-free models) have largely been disconnected from
studies of coronal heating and emission.
Static loop models, the most common method for study emission, have thus far
been unsuccessful in explaining some important properties of coronal loops.
We propose to use physics-based models of active region magnetic fields that
use solar magnetograms as boundary conditions and include realistic energy
transport (radiative losses, anisotropic thermal conduction, and coronal
heating) in the transition region and corona to investigate emission in
active regions.
We will investigate three aspects of active region physics
that may lead to time-dependent behavior of the coronal plasma:
(1) Thermal non-equilibrium; (2) Non-steady coronal heating; (3) Magnetic
field evolution. Preliminary results suggest our model may be capable
of explaining some of the mysterious properties of coronal loops.
Our model will produce quantitative predictions
of emission that we will test against observations from SOHO, TRACE,
Yohkoh, and SXI. Our proposed program is also highly relevant to the
upcoming Solar-B, STEREO, and SDO missions.
Publications:
Performance Year | Reference | Investigation Type | Actions |
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1 | Lionello, R., Linker, J. A., and Mikic, Z. 2009, "Multispec...
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1 | Riley, Pete; Linker, Jon A.; Mikic, Zoran; Lionello,Â...
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1 | Lionello, Roberto; Linker, Jon A.; Mikić, Zoran; (200...
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Presentations:
Performance Year | Reference | Actions |
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1 | Linker, Jon A.; Lionello, R.; Mikic, Z.; Riley, P.;Â...
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1 | Mok, Yung; Mikic, Z.; Lionello, R.; Linker, J.; (2007...
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1 | Mok, Y.; Lionello, R.; Mikic, Z.; Linker, J. A.; (20...
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1 | Lionello, R.; Linker, J. A.; Mikić, Z.; Mok, Y.; (2...
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1 | Mok, Yung; Lionello, R.; Mikic, Z.; Linker, J.; (2009...
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