WHY DOES THE APPARENT MASS OF A CORONAL MASS EJECTION INCREASE?

CORC > 紫金山天文台 > 中国科学院紫金山天文台 > 太阳高能及相关物理过程研究团组

	WHY DOES THE APPARENT MASS OF A CORONAL MASS EJECTION INCREASE?
	Feng, Li1,2 ; Wang, Yuming 3; Shen, Fang 4; Shen, Chenglong 3; Inhester, Bernd 2; Lu, Lei 1; Gan, Weiqun1
刊名	ASTROPHYSICAL JOURNAL
	2015-10-10
卷号	812 期号:1 页码:70-81
关键词	Sun: corona Sun: coronal mass ejections (CMEs) solar wind
英文摘要	Mass is one of the most fundamental parameters characterizing the dynamics of a coronal mass ejection (CME). It has been found that CME apparent mass measured from the brightness enhancement in coronagraphs increases during its evolution in the corona. However, the physics behind it is not clear. Does the apparent mass gain come from the outflow from the dimming regions in the low corona, or from the pileup of the solar wind plasma around the CME? Here we analyze the mass evolution of six CME events. Based on the coronagraph observations from the Solar Terrestrial Relations Observatory, we find that their masses increased by a factor of 1.3-1.7 from 7 to 15 R-S, where the occulting effect is negligible. We then adopt the "snow-plow" model to calculate the mass contribution of the piled-up solar wind. The result gives evidence that the solar wind pileup probably makes a non-negligible contribution to the mass increase. In the height range from about 7 to 15 R-S, the ratio of the modeled to the measured mass increase is roughly larger than 0.55 though the ratios are believed to be overestimated. It is not clear yet whether the solar wind pileup is a major contributor to the final mass derived from coronagraph observations, but it does play an increasingly important role in the mass increase as a CME moves further away from the Sun.
学科主题	天体物理学
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	LARGE-ANGLE ; STEREO ; SIMULATIONS ; EVOLUTION ; ENERGY ; EARTH ; LOCALIZATION ; PROPAGATION ; VIEWPOINTS ; SPACE
收录类别	SCI
语种	英语
WOS记录号	WOS:000364234700070
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/15209]
专题	紫金山天文台_太阳高能及相关物理过程研究团组
作者单位	1.Chinese Acad Sci, Purple Mt Observ, Key Lab Dark Matter & Space Astron, Nanjing, Jiangsu, Peoples R China 2.Max Planck Inst Sonnensyst Forsch, Gottingen, Lower Saxony, Germany 3.Univ Sci & Technol China, Sch Earth & Space Sci, CAS Key Lab Geospace Environm, Hefei 230026, Peoples R China 4.Chinese Acad Sci, Natl Space Sci Ctr, State Key Lab Space Weather, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Feng, Li,Wang, Yuming,Shen, Fang,et al. WHY DOES THE APPARENT MASS OF A CORONAL MASS EJECTION INCREASE?[J]. ASTROPHYSICAL JOURNAL,2015,812(1):70-81.
APA	Feng, Li.,Wang, Yuming.,Shen, Fang.,Shen, Chenglong.,Inhester, Bernd.,...&Gan, Weiqun.(2015).WHY DOES THE APPARENT MASS OF A CORONAL MASS EJECTION INCREASE?.ASTROPHYSICAL JOURNAL,812(1),70-81.
MLA	Feng, Li,et al."WHY DOES THE APPARENT MASS OF A CORONAL MASS EJECTION INCREASE?".ASTROPHYSICAL JOURNAL 812.1(2015):70-81.