Award Abstract #0519249
NSWP: Collaborative Analyses of the Formation, Activation and Long-term Slow Rise of Filaments as Precursors to Coronal Mass Ejections (CMEs)

NSF Org:	ATM Division of Atmospheric Sciences
Initial Amendment Date:	September 1, 2005
Latest Amendment Date:	August 8, 2007
Award Number:	0519249
Award Instrument:	Continuing grant
Program Manager:	Paul Bellaire ATM Division of Atmospheric Sciences GEO Directorate for Geosciences
Start Date:	December 1, 2005
Expires:	November 30, 2009 (Estimated)
Awarded Amount to Date:	$478263
Investigator(s):	Sara Martin sara@helioresearch.org (Principal Investigator) Terry Forbes (Co-Principal Investigator) Yuri Litvinenko (Co-Principal Investigator) Alexei Pevtsov (Co-Principal Investigator)
Sponsor:	Helio Research 5212 Maryland Avenue La Crescenta, CA 91214 818/957-7507
NSF Program(s):	UPPER ATMOSPHERIC FACILITIES, SOLAR-TERRESTRIAL
Field Application(s):	0205000 Space
Program Reference Code(s):	EGCH, 9196, 4444
Program Element Code(s):	4202, 1523

ABSTRACT

This collaborative observational and theoretical research proposal focuses on the formation, activation, and the long-term slow ascent of solar filaments prior to their eruption as Coronal Mass Ejections (CMEs). This team of six scientists from five institutions will use high- and medium-resolution data from ground-based telescopes (NSO's ISOON, DST, SOLIS, as well as Helio Research and the Swedish Solar telescopes) and space-borne instruments (SOHO's EIT, MDI, LASCO) in combination with theoretical analysis. The PI and her team will: (1) model the role of magnetic reconnection in the formation of filaments and their substructures known as "barbs;" (2) study the relationships of filament fine-structure to chromospheric structure and photospheric magnetic fields, in order to identify mass flows into and out of the main body of filaments at the highest available spatial resolution (0.5-0.15 arc sec); (3) model the ways that filaments and their barbs can experience local or full body accelerated mass motions (called "activations") and how the barbs detach from the chromosphere when destabilized under various conditions; (4) analyze existing sets of multi-wavelength Ha Doppler data to reveal the types of motions that occur during filament activations and the early stages of filament eruption; and (5) study the long-term slow rise of filaments as an early indicator of their destabilization and eruption.

A central theme for both of these theoretical and observational investigations is the long overlooked roles of barbs in the formation, evolution, activation, and eruption of filaments. The PI will also extend earlier preliminary studies indicating that filaments exhibit both systematic and sporadic increases in their overall height and in the velocities of their mass motions during several days preceding filament eruption. As part of the broader impacts, the modeling, analyses, and acquisition of new observations will involve at least one postdoc and at least six undergraduate students.

PUBLICATIONS PRODUCED AS A RESULT OF THIS RESEARCH

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Balasubramaniam, K. S., Pevtsov, A. A., & Neidig, D. F.  "Are Moreton Waves Coronal Phenomena?,"  Astrophys. J.,  v.659,  2007,  p. 1372.

Balasubramaniam, K. S., Pevtsov, A. A., Neidig, D. F., & Hock, R. A..  "Large-scale Solar Chromospheric Activity? A Signature of magnetic reconnection,"  Proceedings of the ILWS Workshop,  v.0,  2006,  p. 65.

Chae, J.; Litvinenko Y. E.; Sakurai, T..  "Determination of Magnetic Diffusivity from High-Resolution Solar Magnetograms,"  Astrophysical J.,  v.683,  2008,  p. 1153.

Craig, I. J. D.; Litvinenko, Y. E..  "Wave Energy Dissipation by Anisotropic Viscosity in Magnetic X-Points,"  Astrophys. J.,  v.667,  2007,  p. 1235.

Engvold, O..  "Observational aspects of prominence oscillations,"  Proceedings from IAU Symposium,  v.247,  2007,  p. 154.

Forbes, T.G..  "Predicting the onset of solar eruptions,"  Exploring the Solar System and the Universe, Proceedings of the Bucharest Observatory Centenary held in Bucharest, Romania April 8-12, 2008, (eds. V. Mioc, C. Dumitrache, and N.A. Popescu), AIP Conf. Proc. 1043, Melville, NY,,  2008,  p. 245.

Isenberg, P.A. and Forbes, T.G..  "A Three-Dimensional Line-Tied Magnetic Field Model for Solar Eruptions,"  Astrophys. J.,  v.670,  2007,  p. 1453.

Joshi, Vishal and Srivastava, Nandita.  "On the Study of Kinematics of Erupting Prominences in Ha and 304A,"  Proceedings of The 2nd UN/NASA IHY Workshop, Bulletin of Astron. Soc. India,  v.35,  2007,  p. 447.

Lin, Y., Martin, S.F. and Engvold, O..  "Filament substructures and their interrelation,"  Subsurface and Atmospheric Influences on Solar Activity, eds. R. Howe, K.S. Balasubramaniam and R. Komm, and G.J.D Petrie, ASP Conference Series,  v.383,  2008,  p. 235.

Lin, Y.; Engvold, O.; Rouppe van der Voort, L. H. M.; van Noort, M..  "Evidence of Traveling Waves in Filament Threads,"  Solar Phys.,  v.246,  2007,  p. 65.

Lin, Y.; Martin, S.F.; Engvold, O..  "Filament Substructures and their Interrelation,"  ASP Conference Series,  v.383,  2008,  p. 235.

Lin, Y.; Martin, S.F.; Engvold, O.; Rouppe van der Voort, L.H.M.; van Noort, M..  "Dynamics of an active region filament, fibrils and surges in high resolution,"  Adv. Space Res. 2007,  v.42,  2007,  p. 803.

Litvinenko, Y. E., Chae, J., Park, S.-Y..  "Flux pile-up magnetic reconnection in the solar photosphere,"  Astrophys. J.,  v.662,  2007,  p. 1302.

Litvinenko, Y., Chae, J., and Park, S.-Y..  "Flux Pile-up Magnetic Reconnection in the Solar Photosphere,"  Astrophys. J.,  v.662,  2007,  p. 1302.

Litvinenko, Y.E..  "Shear-driven magnetic reconnection in viscous resistive incompressible plasmas,"  Physics of Plasmas,  v.13,  2006,  p. 092305.

Litvinenko, Y.E. and Wheatland, M.S..  "A simple dynamical model for filament formation in the solar corona,"  Astrophys. J.,  v.630,  2005,  p. 587.

Martin, S. F., Lin, Y., and Engvold, O..  "A Method of Resolving the 180 Degree Ambiguity Using the Chirality of Solar Features,"  Solar Phys.,  v.250,  2007,  p. 31.

Martin, S.F., Lin, Y. and Engvold, O..  "A Method of Resolving the 180 Degree Ambiguity by Employing the Chirality of Solar Features,"  Solar Phys.,  v.250,  2008,  p. 31.

Martin, S.F., Panasenco, O.; Engvold, O. and Lin.  "The Link Between CMEs, Filaments, and Filament Channels,"  Annales of Geophysics,  v.250,  2008,  p. 1.

Panasenco, O. and Martin, S.F..  "Topological Analyses of Symmetric Eruptive Prominencesin Subsurface and Atmospheric Influences on Solar Activity, eds. R. Howe, K.S. Balasubramaniam and R. Komm, and G.J.D Petrie,,"  ASP conference Series,  v.383,  2007,  p. 243.


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