Статья

Probing the Sun’s Near Surface Shear Layer using HMI Spherical Harmonic Coefficients

S. C. TripathyNational Solar Observatory, 3665 Discovery Dr., Boulder, CO 80303, USAKiran JainNational Solar Observatory, 3665 Discovery Dr., Boulder, CO 80303, USAS. KholikovInstitute of Fundamental and Applied Research, National Research University, TIIAME, UzbekistanR. KommNational Solar Observatory, 3665 Discovery Dr., Boulder, CO 80303, USA

Proceedings of the International Astronomical Unionjournal2023en

ABI

Аннотация

Abstract We have measured zonal and meridional components of subsurface flows up to a depth of 30 Mm below the solar surface by applying the technique of ring diagram on Dopplergrams which are constructed from the spherical harmonic (SH) coefficients. The SH coefficients are obtained from the Helioseismic and Magnetic Imager (HMI) full-disk Dopplergrams. We find a good agreement and some differences between the flows obtained in this study with those from the traditional methods using direct Dopplergrams.

Темы

Geophysics and Gravity Measurements Solar and Space Plasma Dynamics Adaptive optics and wavefront sensing

Идентификаторы

DOI: 10.1017/s1743921323004234

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