Spicule observed in He 10830 Å Solar seminar in 2009 April 20 Short : Tetsu Anan HAZEL Bueno et...

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Spicule observed in He 10830 Å Solar seminar in 2009 April 20 Short : Tetsu Anan HAZEL Bueno et al. 200 Nuño et al. 2007 1 , 2 , 3 ,

Transcript of Spicule observed in He 10830 Å Solar seminar in 2009 April 20 Short : Tetsu Anan HAZEL Bueno et...

  • Spicule observed in He 10830 Solar seminar in 2009 April 20Short : Tetsu AnanHAZELBueno et al. 2005Nuo et al. 20071,2,3,

  • HE10830upper chromospheric spectral line Multiplet line (triplet)EUV coronal irradiation ( (lower) level to be populatedcollisional excitation & ionization

    BLUE COMPONENTRED COMPONENTNuo et al. 2007

    []loweruppergRelative strength10829.092.000.11110830.251.750.33310830.341.250.556

  • HE10830Sunspot observed at DST in Hida observtory

  • Hanle effectWeak B rotated and modify the direction of unmagnetized linear scattering polarization (population imbalances)Bueno et al. 2005Zeeman splitting => good!! in He 10830

    * circular polarization for line-of-sight B B * linear polarization for perpendicular line-of-sight B^2 negligible for perpendicular line-of-sight B < 100GDiagnostic for investigating the magnetism in He 10830 : diagnostic tool (Hanle, Zeeman, Paschen-Back ) I studied at Hanle effect workshop in this spiring from Mr. Katsukawa (Tujillo Bueno,Asensio Ramos,,,)HAZELB in Gauss in

  • Model & coordinate Slab modelConstant property slabBackground light is unpolarized anisotropic continuum radiation =>population balance, source function, absorption coefficientneglect collision optical thickness is HAZELheight local coordinate for BBmagnetic field strengthB incrinationB: azimuth

  • parameterHAZELHeight

  • InversionHAZEL

  • problemLinear polarization of the 10830 is sensitive (via the upper level Hanle effect) to B = 0.110G tlife=life time (in seconds) of the given atomic level g=Lande factor B >10G We can get only B,B from linear polarization B from circular polarization (Zeeman effect) => BConstant propertyVan-Vleck ambiguity => There are an angle having no atomic polarization 180ambiguityHAZEL

  • =90=0=90+QLocal cordinateOff-limb observation

  • Van-Vleck angle90scatteringB const.

  • Offlimb_00inclinationazimuthFor example of ambiguity from Mr Katukawas presentation file square distribution mapRed point is answerB constant [5]

  • Offlimb_01inclinationazimuthFor example of ambiguity from Mr Katukawas presentation file square distribution mapRed point is answerB constant [5]

  • Offlimb_04inclinationazimuthFor example of ambiguity from Mr Katukawas presentation file square distribution mapRed point is answerB constant [5]

  • Offlimb_02inclinationazimuthFor example of ambiguity from Mr Katukawas presentation file square distribution mapRed point is answerB constant [5]

  • Offlimb_06inclinationazimuthFor example of ambiguity from Mr Katukawas presentation file square distribution mapRed point is answerB constant [5]

  • Spicule is Chromospheric small jetsVelocity ~ 25 km/sec ( sound velocity Alfven velocity 10km/sec)Height 6000~10000kmWidth 800 km

    Bueno et al. 2005

  • ObservationBueno et al. 20052001 May 1050 consecutive images(expo.=100ms)

    Nuo et al. 20072005 December 410 consecutive images(expo.=250ms)11m/pxTenerife Infrared Polarimeter mounted on the German Vacum Tower Telescope at the Observatorio del Teide

  • B of off-limb spiculeHeight 2000kmU signal => Hanle effect scatter polarization => Q

    B 10GB 37B 173thermal velocity 13.5 km/s artificially enhancing the damping parameterOptically thick modelBueno et al. 2005Open circleobserved stokes profileSolid linetheoretical modelingred circlecaused by the presence of a significant amount of atomic polarization in the ground level

  • That all


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