Scholarlink

<p>Cross-comparison of solar magnetic fields measurements made with different telescopes, or with different spectral lines on the same instrument, is important and a traditional task of solar physics. This is crucial from the methodical point of view since allows to understand which device properties are responsible for the differences, if they have a place to be. In some studies this is also useful as a tool for diagnostics of the solar magnetic fields hidden spatial structure, the thin kG flux tubes. Most often the measurements at active regions are used for these purposes. But sometimes observations of the large-scale magnetic fields (LSMF) are involved for such analysis as well. The second case is especially important for some space-weather issues because the LSMF are responsible for the formation of the helio-magnetosphere and solar-wind properties.</p><p>Here we at the first time make a cross-calibration of LSMF observations made with two full-disk instruments, called Solar Telescopes for Operative Predictions (STOP), located at the <i>Sayan Solar</i> (SSO) and <i>Baikal Astrophysical</i> (BAO) observatories. These observatories are situated rather close to each other and sometimes it is possible to observe the Sun practically simultaneously. Despite the common name (caused by the main scientific goals) these telescopes have significant differences and it is interesting to examine how these differences affect on the measured magnetic-field strengths.</p><p>Data sets from both observatories are compared also with <i>Wilcox Solar Observatory</i> (WSO) measurements. As an additional scientific output of this study, SSO, BAO, and WSO measurements are used for calculations of solar-wind speed.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Large-Scale Solar Magnetic Fields Observed with Full-Disk Telescopes at the Sayan and Baikal Observatories: Similarities, Differences, and Application to the Space-Weather Issues

  • 期刊论文

  • 发表日期：

    2026年6月1日

查看全文
  • M. L. Demidov,
  • R. V. Pavlova,
  • V. S. Peshcherov

摘要

Cross-comparison of solar magnetic fields measurements made with different telescopes, or with different spectral lines on the same instrument, is important and a traditional task of solar physics. This is crucial from the methodical point of view since allows to understand which device properties are responsible for the differences, if they have a place to be. In some studies this is also useful as a tool for diagnostics of the solar magnetic fields hidden spatial structure, the thin kG flux tubes. Most often the measurements at active regions are used for these purposes. But sometimes observations of the large-scale magnetic fields (LSMF) are involved for such analysis as well. The second case is especially important for some space-weather issues because the LSMF are responsible for the formation of the helio-magnetosphere and solar-wind properties.

Here we at the first time make a cross-calibration of LSMF observations made with two full-disk instruments, called Solar Telescopes for Operative Predictions (STOP), located at the Sayan Solar (SSO) and Baikal Astrophysical (BAO) observatories. These observatories are situated rather close to each other and sometimes it is possible to observe the Sun practically simultaneously. Despite the common name (caused by the main scientific goals) these telescopes have significant differences and it is interesting to examine how these differences affect on the measured magnetic-field strengths.

Data sets from both observatories are compared also with Wilcox Solar Observatory (WSO) measurements. As an additional scientific output of this study, SSO, BAO, and WSO measurements are used for calculations of solar-wind speed.