THREE-DIMENSIONAL MORPHOLOGY OF A CORONAL PROMINENCE CAVITY

	THREE-DIMENSIONAL MORPHOLOGY OF A CORONAL PROMINENCE CAVITY
	Gibson, S. E.1; Kucera, T. A.2; Rastawicki, D.3; Dove, J.4; De Toma, G.1; Hao, J.5; Hill, S.6; Hudson, H. S.7; Marque, C.8; McIntosh, P. S.9
刊名	ASTROPHYSICAL JOURNAL
	2010-12-01
卷号	724 期号:2 页码:1133-1146
关键词	Sun: corona Sun: coronal mass ejections (CMEs) Sun: filaments, prominences Sun: magnetic topology
英文摘要	We present a three-dimensional density model of coronal prominence cavities, and a morphological fit that has been tightly constrained by a uniquely well-observed cavity. Observations were obtained as part of an International Heliophysical Year campaign by instruments from a variety of space-and ground-based observatories, spanning wavelengths from radio to soft X-ray to integrated white light. From these data it is clear that the prominence cavity is the limb manifestation of a longitudinally extended polar-crown filament channel, and that the cavity is a region of low density relative to the surrounding corona. As a first step toward quantifying density and temperature from campaign spectroscopic data, we establish the three-dimensional morphology of the cavity. This is critical for taking line-of-sight projection effects into account, since cavities are not localized in the plane of the sky and the corona is optically thin. We have augmented a global coronal streamer model to include a tunnel-like cavity with elliptical cross-section and a Gaussian variation of height along the tunnel length. We have developed a semi-automated routine that fits ellipses to cross-sections of the cavity as it rotates past the solar limb, and have applied it to Extreme Ultraviolet Imager observations from the two Solar Terrestrial Relations Observatory spacecraft. This defines the morphological parameters of our model, from which we reproduce forward-modeled cavity observables. We find that cavity morphology and orientation, in combination with the viewpoints of the observing spacecraft, explain the observed variation in cavity visibility for the east versus west limbs.
收录类别	SCI
语种	英语
WOS记录号	WOS:000284149000023
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/7725]
专题	国家天文台_空间科学研究部
作者单位	1.HAO NCAR, Boulder, CO 80307 USA 2.NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA 3.Stanford Univ, Stanford, CA 94305 USA 4.Metropolitan State Coll, Denver, CO 80217 USA 5.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 6.NOAA, Natl Weather Serv, Space Weather Predict Ctr, Boulder, CO 80305 USA 7.Univ Calif Berkeley, Space Sci Labs, Berkeley, CA 94720 USA 8.Royal Observ Belgium, B-1180 Brussels, Belgium 9.HelioSynopt Inc, Boulder, CO 80301 USA 10.Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA
推荐引用方式 GB/T 7714	Gibson, S. E.,Kucera, T. A.,Rastawicki, D.,et al. THREE-DIMENSIONAL MORPHOLOGY OF A CORONAL PROMINENCE CAVITY[J]. ASTROPHYSICAL JOURNAL,2010,724(2):1133-1146.
APA	Gibson, S. E..,Kucera, T. A..,Rastawicki, D..,Dove, J..,De Toma, G..,...&Zhang, M..(2010).THREE-DIMENSIONAL MORPHOLOGY OF A CORONAL PROMINENCE CAVITY.ASTROPHYSICAL JOURNAL,724(2),1133-1146.
MLA	Gibson, S. E.,et al."THREE-DIMENSIONAL MORPHOLOGY OF A CORONAL PROMINENCE CAVITY".ASTROPHYSICAL JOURNAL 724.2(2010):1133-1146.