Scholarlink

Abstract <p>In this paper, the results of an analysis of photometric activity of the star HAT-P-11, which hosts two planets, have been presented. This analysis has been based on archival data from the KWS, DASCH, and ASAS-SN sky surveys, as well as the Kepler telescope archive. S-index variability data have also been examined. Evidence of long-term cycles of 500–600 and 600–700<sup><i>d</i></sup> has been found. The DASCH archive data have supported this conclusion by suggesting longer cycles. Based on the ASAS-SN survey data, the cyclicity on scales of approximately 1500 days has been suggested. Based on the S-index data, the cycle length (3848<sup><i>d</i></sup>) is close to the estimated orbital period of 3299 days for the exoplanet HAT-P-11 c. Using an approximation formula corresponding to the energy-limited atmosphere loss model, we have estimated the mass outflow from the atmosphere of planet b. These estimates range from <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(1.7 \times {{10}^{9}}\)</EquationSource> <!--AstEng2670009Savanov-m1--> </InlineEquation> g/s for <InlineEquation ID="IEq2"> <EquationSource Format="TEX">\(\log {{R}^{'}_{{HK}}}\, = - 4.67\)</EquationSource> <!--AstEng2670009Savanov-m2--> </InlineEquation> to <InlineEquation ID="IEq3"> <EquationSource Format="TEX">\(3.3 \times {{10}^{9}}\)</EquationSource> <!--AstEng2670009Savanov-m3--> </InlineEquation> g/s for <InlineEquation ID="IEq4"> <EquationSource Format="TEX">\(\log {{R}^{'}_{{HK}}}\, = - 4.51\)</EquationSource> <!--AstEng2670009Savanov-m4--> </InlineEquation>. Based on 261 estimates of the parameter S, we have calculated the mass loss from the atmosphere of HAT-P-11 b in the interval of 6152 days (16.85 years).</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

Activity of the K4 Dwarf HAT-P-11 and Mass Loss of the Atmosphere of Its Exoplanet HAT-P-11 b

  • 期刊论文

  • 发表日期：

    2025年12月1日

查看全文
  • I. S. Savanov,
  • A. D. Kalinkin

摘要

Abstract

In this paper, the results of an analysis of photometric activity of the star HAT-P-11, which hosts two planets, have been presented. This analysis has been based on archival data from the KWS, DASCH, and ASAS-SN sky surveys, as well as the Kepler telescope archive. S-index variability data have also been examined. Evidence of long-term cycles of 500–600 and 600–700d has been found. The DASCH archive data have supported this conclusion by suggesting longer cycles. Based on the ASAS-SN survey data, the cyclicity on scales of approximately 1500 days has been suggested. Based on the S-index data, the cycle length (3848d) is close to the estimated orbital period of 3299 days for the exoplanet HAT-P-11 c. Using an approximation formula corresponding to the energy-limited atmosphere loss model, we have estimated the mass outflow from the atmosphere of planet b. These estimates range from \(1.7 \times {{10}^{9}}\) g/s for \(\log {{R}^{'}_{{HK}}}\, = - 4.67\) to \(3.3 \times {{10}^{9}}\) g/s for \(\log {{R}^{'}_{{HK}}}\, = - 4.51\) . Based on 261 estimates of the parameter S, we have calculated the mass loss from the atmosphere of HAT-P-11 b in the interval of 6152 days (16.85 years).