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Proper orthogonal decomposition of solar photospheric motions

Abstract:

The spatiotemporal dynamics of the solar photosphere is studied by performing a proper orthogonal decomposition (POD) of line of sight velocity fields computed from high resolution data coming from the MDI/SOHO instrument. Using this technique, we are able to identify and characterize the different dynamical regimes acting in the system. Low-frequency oscillations, with frequencies in the range 20-130μHz, dominate the most energetic POD modes (excluding solar rotation), and are characterized by spatial patterns with typical scales of about 3 Mm. Patterns with larger typical scales of 10Mm, are associated to p-modes oscillations at frequencies of about 3000μHz. © 2005 The American Physical Society.

Año de publicación:

2005

Keywords:

    Fuente:

    scopusscopus

    Tipo de documento:

    Article

    Estado:

    Acceso restringido

    Áreas de conocimiento:

    • Dinámica de fluidos
    • Energía solar

    Áreas temáticas:

    • Física
    • Cuerpos y fenómenos celestes específicos

    Contribuidores:

    Vecchio A.Vecchio A.
    Lepreti F.Lepreti F.
    Luca Sorriso-ValvoLuca Sorriso-Valvo
    Veltri P.Veltri P.
    Straus T.Straus T.
    Alfonsi G.Alfonsi G.
    Carbone V.Carbone V.
    Primavera L.Primavera L.