TOWARD RECONSTRUCTION OF CORONAL MASS EJECTION DENSITY FROM ONLY THREE POINTS OF VIEW

R. A FRAZIN; M JACOB; W. B MANCHESTER; H MORGAN; M. B WAKIN

doi:10.1088/0004-637X/695/1/636

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TOWARD RECONSTRUCTION OF CORONAL MASS EJECTION DENSITY FROM ONLY THREE POINTS OF VIEW

Journal article

Open access

Peer reviewed

TOWARD RECONSTRUCTION OF CORONAL MASS EJECTION DENSITY FROM ONLY THREE POINTS OF VIEW

R. A FRAZIN, M JACOB, W. B MANCHESTER, H MORGAN and M. B WAKIN

The Astrophysical journal, Vol.695(1), pp.636-641

2009

DOI: 10.1088/0004-637X/695/1/636

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Abstract

Understanding the structure of coronal mass ejections (CMEs) is one of the primary challenges in solar astrophysics. White-light coronagraphs make images of line-of-sight projections of the CME electron density (Ne). The combination of the coronagraphs on the STEREO and SOHO spacecraft provides three simultaneous viewpoints that vary in angle with time, according to the spacecraft orbits. Three viewpoints are not enough to permit tomographic reconstruction via classical methods, but we argue here that recent advances in image processing methods that take into account prior information about the CME geometry may allow one to determine the CME density structure with only three viewpoints. The prior information considered here is that the CME is separated from a known (or simple) background by a closed surface, which may be described by a level set. We propose an alternating iterative procedure in which the surface is evolved via geometric partial differential equations in one step and the interior (and exterior) Ne values are determined in the next step.

Astronomy

Earth, ocean, space

Exact sciences and technology

Details

Title: Subtitle: TOWARD RECONSTRUCTION OF CORONAL MASS EJECTION DENSITY FROM ONLY THREE POINTS OF VIEW
Creators: R. A FRAZIN - Department of Atmospheric, Oceanic and Space Sciences, University of Michigan, Ann Arbor, MI 48109, United States
M JACOB - Department of Biomedical Engineering, University of Rochester, Rochester, NY 14627, United States
W. B MANCHESTER - Department of Atmospheric, Oceanic and Space Sciences, University of Michigan, Ann Arbor, MI 48109, United States
H MORGAN - Institute for Astronomy, University of Hawaii, 2680 Woodlawn Dr., Honolulu, HI 96822, United States
M. B WAKIN - Electrical Engineering and Computer Science Dept., University of Michigan, Ann Arbor, MI 48109, United States
Resource Type: Journal article
Publication Details: The Astrophysical journal, Vol.695(1), pp.636-641
DOI: 10.1088/0004-637X/695/1/636
ISSN: 0004-637X
eISSN: 1538-4357
Publisher: Institute of Physics (IOP); Bristol
Language: English
Date published: 2009
Academic Unit: Roy J. Carver Department of Biomedical Engineering; Radiology; Electrical and Computer Engineering; Iowa Neuroscience Institute; Radiation Oncology
Record Identifier: 9984070886902771

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