Probing the Sun's Near Surface Shear Layer using HMI Spherical Harmonic Coefficients
Solar and Stellar Astrophysics
2023-12-20 v1
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.
Cite
@article{arxiv.2312.11699,
title = {Probing the Sun's Near Surface Shear Layer using HMI Spherical Harmonic Coefficients},
author = {Sushanta C. Tripathy and Kiran Jain and Shukurijon Kholikov and Rudolf Komm},
journal= {arXiv preprint arXiv:2312.11699},
year = {2023}
}
Comments
6 pages and 4 figures; Proceedings of the IAU Symposium 365 - Dynamics of Solar and Stellar Convection Zones and Atmospheres, 2023 August 21-25, Yerevan, Armenia