Initial results are presented on solar granulation, pores and sunspots from the white-light films obtained by the Solar Optical Universal Polarimeter (SOUP) instrument in Spacelab 2. Several hours of movies were taken at various disk and limb positions in quiet and active regions. The images are diffraction-limited at 0.5 arcsec resolution and are, of course, free of atmospheric seeing and distortion. Properties of the granulation in magnetic and nonmagnetic regions are compared and are found to differ significantly in size, rate of intensity variation, and lifetime. In quiet sun, on the order of fifty-percent of the area has at least one 'exploding granule' occurring in it during a 25-min period. Local correlation tracking has detected several types of transverse flows, including systematic outflow from the penumbral boundary of a spot, motion of penumbral filaments, and cellular flow patterns of supergranular and mesogranular size. Feature tracking has shown that, in the quiet sun, the average granule fragment has a velocity of about one kilometer/second.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen


    Exportieren, teilen und zitieren



    Titel :

    White-light movies of the solar photosphere from the SOUP instrument on Spacelab


    Beteiligte:
    Title, A. M. (Autor:in) / Tarbell, T. D. (Autor:in) / Acton, L (Autor:in) / Duncan, D. (Autor:in) / Simon, G. W. (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    1986-01-01



    Medientyp :

    Sonstige


    Format :

    Keine Angabe


    Sprache :

    Englisch


    Schlagwörter :


    Image Motion Compensation on the Spacelab 2 Solar Optical Universal Polarimeter (SL2 SOUP)

    T. D. Tarbell / D. W. Duncan / M. L. Finch et al. | NTIS | 1983


    The Solar Photosphere: Open Questions

    Schuessler, M. | British Library Online Contents | 1998


    An Instrument-Pointing System for Spacelab

    H. Heusmann / K. H. David / W. Fehse et al. | NTIS | 1976



    The composition of the solar photosphere

    Grevesse, N. | Online Contents | 2002