OBSERVATION OF ULTRAFINE CHANNELS OF SOLAR CORONA HEATING

CORC > 紫金山天文台 > 中国科学院紫金山天文台 > 太阳活动的多波段观测研究团组

	OBSERVATION OF ULTRAFINE CHANNELS OF SOLAR CORONA HEATING
	Ji, Haisheng1,2 ; Cao, Wenda 2,3; Goode, Philip R.2,3
刊名	ASTROPHYSICAL JOURNAL LETTERS
	2012-05-01
卷号	750 期号:1 页码:L25(5pp)
关键词	Sun: chromosphere Sun: corona Sun: photosphere Sun: transition region
ISSN号	2041-8205
英文摘要	We report the first direct observations of dynamical events originating in the Sun's photosphere and subsequently lighting up the corona. Continuous small-scale, impulsive events have been tracked from their origin in the photosphere on through to their brightening of the local corona. We achieve this by combining high-resolution ground-based data from the 1.6 m aperture New Solar Telescope (NST) at Big Bear Solar Observatory (BBSO), and satellite data from the Atmospheric Imaging Assembly (AIA) on board the Solar Dynamics Observatory (SDO). The NST imaging observations in helium I 10830 angstrom reveal unexpected complexes of ultrafine, hot magnetic loops seen to be reaching from the photosphere to the base of the corona. Most of these ultrafine loops are characterized by an apparently constant, but surprisingly narrow diameter of about 100 km all along each loop, and the loops originate on the solar surface from intense, compact magnetic field elements. The NST observations detect the signature of upward injections of hot plasma that excite the ultrafine loops from the photosphere to the base of the corona. The ejecta have their individual footpoints in the intergranular lanes between the Sun's ubiquitous, convectively driven granules. In many cases, AIA/SDO detects cospatial and cotemporal brightenings in the overlying, million degree coronal loops in conjunction with the upward injections along the ultrafine loops. Segments of some of the more intense upward injections are seen as rapid blueshifted events in simultaneous Ha blue wing images observed at BBSO. In sum, the observations unambiguously show impulsive coronal heating events from upward energy flows originating from intergranular lanes on the solar surface accompanied by cospatial mass flows.
学科主题	Astronomy & Astrophysics
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	MAGNETIC-FIELDS ; CHROMOSPHERE
收录类别	SCI
语种	英语
WOS记录号	WOS:000303039700025
公开日期	2013-01-31
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/8131]
专题	紫金山天文台_太阳活动的多波段观测研究团组
作者单位	1.CAS, Purple Mt Observ, Key Lab Dark Matter & Space Sci, Nanjing 210008, Jiangsu, Peoples R China 2.Big Bear Solar Observ, Big Bear City, CA 92314 USA 3.New Jersey Inst Technol, Ctr Solar Terr Res, Newark, NJ 07102 USA
推荐引用方式 GB/T 7714	Ji, Haisheng,Cao, Wenda,Goode, Philip R.. OBSERVATION OF ULTRAFINE CHANNELS OF SOLAR CORONA HEATING[J]. ASTROPHYSICAL JOURNAL LETTERS,2012,750(1):L25(5pp).
APA	Ji, Haisheng,Cao, Wenda,&Goode, Philip R..(2012).OBSERVATION OF ULTRAFINE CHANNELS OF SOLAR CORONA HEATING.ASTROPHYSICAL JOURNAL LETTERS,750(1),L25(5pp).
MLA	Ji, Haisheng,et al."OBSERVATION OF ULTRAFINE CHANNELS OF SOLAR CORONA HEATING".ASTROPHYSICAL JOURNAL LETTERS 750.1(2012):L25(5pp).