Mesogranulation and Turbulence in Photospheric Flows
Astrophysics
2015-06-24 v1
Abstract
Below the scale of supergranules we find that cellular flows are present in the solar photosphere at two distinct size scales, approximately 2 Mm and 4 Mm, with distinct characteristic times. Simultaneously present in the flow is a non-cellular component, with turbulent scaling properties and containing 30% of the flow energy. These results are obtained by means of wavelet spectral analysis and modeling of vertical photospheric motions in a 2-hour sequence of 120 SOHO/MDI, high resolution, Doppler images near disk center. The wavelets permit detection of specific local flow patterns corresponding to convection cells.
Cite
@article{arxiv.astro-ph/0104354,
title = {Mesogranulation and Turbulence in Photospheric Flows},
author = {J. K. Lawrence and A. C. Cadavid and A. Ruzmaikin},
journal= {arXiv preprint arXiv:astro-ph/0104354},
year = {2015}
}
Comments
Accepted for Solar Physics. 16 pages including 7 figures