First Results on it p Modes from GOLF Experiment
First Results on it p Modes from GOLF Experiment
复制标题
高尔夫实验模式的初步结果
DOI：
10.1023/a:1004942929956
复制
发表时间：
1997
期刊：
影响因子：
2.8
通讯作者：
R. Ulrich
中科院分区：
文献类型：
--
作者：
M. Lazrek;F. Baudin;L. Bertello;P. Boumier;J. Charra;D. Fierry;E. Fossat;A. Gabriel;Rafael A. García;B. Gelly;C. Gouiffès;G. Grec;P. Pallé;F. P. Hernández;C. Régulo;C. Renaud;J. Robillot;T. R. Cortés;S. Turck;R. Ulrich
SOHO任务上的高尔夫实验旨在通过测量频率范围为10-7至10-2赫兹的全球振荡频谱来研究太阳的内部结构。这里我们给出了前8个月数据的分析结果。特别强调了p个模式的频率确定，以及由于旋转而导致的多重态的分裂。对于这两种情况，我们都表明，相对于地面网络和其他实验，S/N水平的提高对于实现误差很小的极低阶频率表是必不可少的(∼2部分在10-5)。另一方面，发现的分裂似乎有利于一个自转速度不低于其表面的太阳核心。线宽确实与理论预期和其他观测结果一致。
The GOLF experiment on the SOHO mission aims to study the internal structure of the Sun by measuring the spectrum of global oscillations in the frequency range 10-7 to 10-2 Hz. Here we present the results of the analysis of the first 8 months of data. Special emphasis is put into the frequency determination of the p modes, as well as the splitting in the multiplets due to rotation. For both, we show that the improvement in S/N level with respect to the ground-based networks and other experiments is essential in achieving a very low-degree frequency table with small errors ∼ 2 parts in 10-5). On the other hand, the splitting found seems to favour a solar core which does not rotate slower than its surface. The line widths do agree with theoretical expectations and other observations.