PMO OpenIR  > 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, Wenda2,3; Goode, Philip R.2,3
2012-05-01
Source PublicationASTROPHYSICAL JOURNAL LETTERS
ISSN2041-8205
Volume750Issue:1Pages:L25(5pp)
AbstractWe 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.
KeywordSun: Chromosphere Sun: Corona Sun: Photosphere Sun: Transition Region
Subject AreaAstronomy & Astrophysics
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1088/2041-8205/750/1/L25
WOS KeywordMAGNETIC-FIELDS ; CHROMOSPHERE
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000303039700025
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Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/8131
Collection太阳活动的多波段观测研究团组
Affiliation1.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
Recommended Citation
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).
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