Temporal Variations of High-Degree Solar p-Modes from GONG and MDI
Solar and Stellar Astrophysics
2015-05-20 v1
Abstract
We study temporal variations in the amplitudes and widths of high-degree acoustic modes in the quiet and active Sun by applying ring-diagram technique to the GONG+ and MDI Dopplergrams during the declining phase of cycle 23. The increase in amplitudes and decrease in line-widths in the declining phase of the solar activity is in agreement with previous studies. A similar solar cycle trend in the mode parameters is also seen in the quiet-Sun regions but with a reduced magnitude. Moreover, the amplitudes obtained from GONG+ data show long-term variations on top of the solar cycle trend.
Keywords
Cite
@article{arxiv.1012.5128,
title = {Temporal Variations of High-Degree Solar p-Modes from GONG and MDI},
author = {Olga Burtseva and S. C. Tripathy and R. Howe and K. Jain and F. Hill and R. Bogart and M. C. Rabello-Soares},
journal= {arXiv preprint arXiv:1012.5128},
year = {2015}
}
Comments
4 pages, 2 figures; Proceedings of the SOHO 24 / GONG 2010 conference, to be published in JPCS