A Possible Mechanism of Flux Cancellation via U-Loop Emergence on the Sun

Magara Tetsuya

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A Possible Mechanism of Flux Cancellation via U-Loop Emergence on the Sun

机译：通过太阳上的U环出现消除通量的可能机制

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Wehaveuseda3-dimensionalMHDsimulationtoinvestigateadynamicprocessproducingfluxcancellationonthesolarsurface.Ourcalculationsarefullyself-consistentinthatanyprescribeddynamicprocessisnotappliedonthesurface,whichisself-consistentlygeneratedviatheemergenceofatwistedfluxtube.Mostofthefluxthatemergesbelowthesurfaceisintheformof$$Omega$$-loops(concave-downgeometry),sothatdensephotosphericplasmacandraindownalongthelegsoftheloopasitrisesintothecorona.Wehavefound,however,thatsomeU-loops(concave-upgeometry)canalsoemerge.AU-loopgeometryimpliesthatafieldlinehasadipbelowthesurfaceandalocalpeaksomewhereabovethesurfaceoneithersideofthedip.AlthoughtheemergenceofU-loopscanproducefluxcancellationonthesurface,loopswithsuchageometryarenotexpectedtoemergeeasily,duetothetrappingofdenseplasmainthedippedportionoftheloops.Ourresultsindicatethatifoneofthepeaksissufficientlylow,ontheorderofthephotosphericgravitationalscaleheightabovethesurface,plasmacandrainoutofthedippedportionbyasiphon-likemechanism,allowingtheU-partoftheloopstoemerge,andresultingincancellationofthemagneticfluxonthesurface.However,ifbothpeaksofaU-looparehighcomparedtothephotosphericscaleheight,denseplasmasimplysettlesinthedipoftheloop,preventingtheU-partfromemerging,ratherproducingreconnection,whichisanotherpossiblemechanismoffluxcancellation.Wealsodiscusstheimplicationsofourresultsforobservations.

机译：Wehaveuseda3-dimensionalMHDsimulationtoinvestigateadynamicprocessproducingfluxcancellationonthesolarsurface.Ourcalculationsarefullyself-consistentinthatanyprescribeddynamicprocessisnotappliedonthesurface，whichisself-consistentlygeneratedviatheemergenceofatwistedfluxtube.Mostofthefluxthatemergesbelowthesurfaceisintheformof $$欧米茄$$ - 环（凹downgeometry），sothatdensephotosphericplasmacandraindownalongthelegsoftheloopasitrisesintothecorona.Wehavefound，然而，thatsomeU-环（凹upgeometry）canalsoemerge.AU-loopgeometryimpliesthatafieldlinehasadipbelowthesurfaceandalocalpeaksomewhereabovethesurfaceoneithersideofthedip.AlthoughtheemergenceofU-loopscanproducefluxcancellationonthesurface，这种测量法的循环不容易出现，这是由于在环的一部分中捕获了稠密的等离子体。我们的结果表明，如果峰值足够低，则通过等离子电话的机制，在表面上的等离子重度应高于表面的等离子。 U环的一部分浮出水面，并导致表面上的电磁通量消除。但是，如果将这两个U环的峰值都与光球规模的高度相比较，则密集的等离子体将在该环上形成一定的沉降，从而防止U形部分出现，从而产生重新连接，这可能会导致其他原因。

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《PASJ: Publications of the Astronomical Society of Japan》 |2011年第2期|共页
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Magara Tetsuya;
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1. A possible mechanism of flux cancellation via U-loop emergence on the sun [J] . Magara T. PASJ: Publications of the Astronomical Society of Japan . 2011,第2期

机译：通过在太阳上出现U环而消除通量的可能机制
2. DETECTION OF FLUX EMERGENCE, SPLITTING, MERGING, AND CANCELLATION OF NETWORK FIELDS. II. APPARENT UNIPOLAR FLUX CHANGE AND CANCELLATION [J] . Y. Iida1, H. J. Hagenaar2, T. Yokoyama3 The Astrophysical journal . 2015,第2期

机译：检测网络通量的出现，分裂，合并和取消。二。明显的单极通量变化和取消
3. PHOTOSPHERIC FLUX CANCELLATION AND THE BUILD-UP OF SIGMOIDAL FLUX ROPES ON THE SUN [J] . A. S. Savcheva12, L. M. Green3, A. A. van Ballegooijen1, The Astrophysical journal . 2012,第2期

机译：太阳上的光球通量取消和正弦通量的建立
4. A MECHANISM FOR THE EMERGENCE OF MAGNETIC U-LOOPS AND FLUX CANCELLATION ON THE SUN [C] . T. Magara, S. K. Antiochos, C. R. DeVore, International Scientific Conference on Chromospheric and Coronal Magnetic Fields . 2005

机译：在阳光下出现磁性U圈和助焊剂的机制
5. Characterizing and modeling magnetic flux transport in the sun's photosphere and determining its impact on the sunspot cycle. [D] . Upton, Lisa A. 2014

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6. Enhancement of the mexAB-oprM Efflux Pump Expression by a Quorum-Sensing Autoinducer and Its Cancellation by a Regulator MexT of the mexEF-oprN Efflux Pump Operon in Pseudomonas aeruginosa [O] . Hideaki Maseda, Isao Sawada, Kohjiro Saito, 2004

机译：铜绿假单胞菌引起的群体感应自动诱导子增强mexAB-oprM外排泵表达并通过调节剂MexT取消了mexEF-oprN外排泵操纵子。
7. DETECTION OF FLUX EMERGENCE, SPLITTING, MERGING, AND CANCELLATION OF NETWORK FIELDS. II. APPARENT UNIPOLAR FLUX CHANGE AND CANCELLATION [O] . Y. Iida, H. J. Hagenaar, T. Yokoyama 2015

机译：检测网络领域的助焊剂出现，分裂，合并和取消。 II。明显的单极通量变化和取消

A Possible Mechanism of Flux Cancellation via U-Loop Emergence on the Sun

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