Statistical study of emerging flux regions and the response of the upper atmosphere

doi:10.1088/1674-4527/12/12/010

	Statistical study of emerging flux regions and the response of the upper atmosphere
	Zhao, Jie 1; Li, Hui
	2012-12-01
Source Publication	RESEARCH IN ASTRONOMY AND ASTROPHYSICS
Volume	12 Issue:12 Pages:1681-1692
Abstract	We statistically study the properties of emerging flux regions (EFRs) and response of the upper solar atmosphere to the flux emergence using data from the Helioseismic and Magnetic Imager and the Atmospheric Imaging Assembly onboard the Solar Dynamics Observatory. Parameters including total emerged flux, flux growth rate, maximum area, duration of the emergence and separation speed of the opposite polarities are adopted to delineate the properties of EFRs. The response of the upper atmosphere is addressed by the response of the atmosphere at different wavelengths (and thus at different temperatures). According to our results, the total emerged fluxes are in the range of (0.44-11.2) x 10(19) Mx while the maximum area ranges from 17 to 182 arcsec(2). The durations of the emergence are between 1 and 12 h, which are positively correlated to both the total emerged flux and the maximum area. The maximum distances between the opposite polarities are 7-25 arcsec and are also positively correlated to the duration. The separation speeds are from 0.05 to 1.08 km s(-1), negatively correlated to the duration. The derived flux growth rates are (0.1-1.3) x 10(19) Mx h(-1), which are positively correlated to the total emerging flux. The upper atmosphere first responds to the flux emergence in the 1600 angstrom chromospheric line, and then tens to hundreds of seconds later, in coronal lines, such as the 171 angstrom(T = 10(5.8) K) and 211 angstrom (T = 10(6.3) K) lines almost simultaneously, suggesting the successive heating of the atmosphere from the chromosphere to the corona.
Keyword	Sun: Magnetic Fields Sun: Uv Radiation Sun: Corona
WOS Headings	Science & Technology ; Physical Sciences
DOI	10.1088/1674-4527/12/12/010
WOS Keyword	X-RAY TELESCOPE ; MICHELSON DOPPLER IMAGER ; MAGNETIC-FLUX ; TRANSIENT BRIGHTENINGS ; EPHEMERAL REGIONS ; ACTIVE-REGION ; CORONAL HOLE ; SOLAR ; FIELDS ; EMERGENCE
Indexed By	SCI
Language	英语
WOS Research Area	Astronomy & Astrophysics
WOS Subject	Astronomy & Astrophysics
WOS ID	WOS:000313011000010
Citation statistics	Cited Times:3[WOS] [WOS Record] [Related Records in WOS]
Document Type	期刊论文
Identifier	http://libir.pmo.ac.cn/handle/332002/15535
Collection	太阳高能及相关物理过程研究团组
Affiliation	1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China 2.Chinese Acad Sci, Key Lab Dark Matter & Space Astron, Nanjing 210008, Peoples R China
Recommended Citation GB/T 7714	Zhao, Jie,Li, Hui. Statistical study of emerging flux regions and the response of the upper atmosphere[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2012,12(12):1681-1692.
APA	Zhao, Jie,&Li, Hui.(2012).Statistical study of emerging flux regions and the response of the upper atmosphere.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,12(12),1681-1692.
MLA	Zhao, Jie,et al."Statistical study of emerging flux regions and the response of the upper atmosphere".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 12.12(2012):1681-1692.

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