Abstract Light bridge (LB) is bright structure crossing the umbra of sunspots and associated to the breakup or assembly of sunspots. In this paper, a LB is presented and studied using the observatory data obtained by Hinode satellites. Force-free factor ( α ) and the z-component of current ( J z ) and tension force ( T z ) are calculated basing on the vector magnetograms observed by Spectro-Polarimeter (SP) of the Solar Optical Telescope (SOT) on board Hinode. It is found that the amplitudes of α and J z of LB are generally larger than those of umbra. It is found that there are two signs of J z along LB, which are divided at near the middle position of LB. It is found that the amplitudes of T z of LB are smaller than those of umbra and there are changes of sign of T z between the boundary of LB and umbra. Through comparisons and investigations, it suggest that LB and umbra maybe two different magnetic systems, which is a necessary condition for interaction magnetic reconnection.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Fine magnetic characteristics of a light bridge observed by Hinode


    Beteiligte:
    Liu, S. (Autor:in) / Liu, D. (Autor:in)

    Erschienen in:

    Advances in Space Research ; 55 , 12 ; 2931-2939


    Erscheinungsdatum :

    2015-02-26


    Format / Umfang :

    9 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch