Characterization of upper atmospheres of hot exoplanets by multi-line observations and complex numerical simulations
中国科学院云南天文台学术报告通知
2025年第30期
报告题目:Characterization of upper atmospheres of hot exoplanets by multi-line observations and complex numerical simulations
报告人:Prof. Shaikhislamov Ildar Faritovich
报告人单位:Institute of Laser Physics, Siberian Branch, Russian Academy of Sciences
报告语言:English
报告时间:2025年7月16日(星期三)15:00-16:00
报告地点:科研1号楼412会议室
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The results of absorption modeling in the hydrogen Hα 6563 Å and helium 10830 Å lines for the hot Jupiter HAT-P-32 b are presented. The modeling was performed using a three-dimensional hydrodynamic code together with the Monte Carlo model of Lyα photons transport. A wide range of stellar radiation parameters and atmospheric parameters was simulated. It was found that the measured spectrally resolved transit absorption in both lines can be well described by model calculations with the stellar radiation in the XUV range limited to 200 erg/cm 2 /s per 1 AU, the helium content in the planet's atmosphere He /H = 2/98 and metallicity [ Fe /H] = –1. It is shown that absorption in the helium line occurs uniformly in a large volume of the outflowing atmosphere, and in the hydrogen line - in a layer of 1.5–2.75 planet radii.
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报告人简介:
Shaikhislamov Ildar Faritovich 教授现任俄罗斯科学院西伯利亚分院激光物理研究所研究部主任、副所长。他于 1988 年毕业于新西伯利亚国立大学物理系,之后在应用力学与理论物理研究所任职,1991 年起在激光物理研究所工作,先后担任初级研究员、高级研究员、首席研究员、副所长、代理所长等职务。Shaikhislamov 教授的研究领域广泛,涵盖等离子体动力学、磁场、电磁吸收、激光物理、太阳风、激波、黑洞环境以及行星能量转化等多个方向。他长期致力于系外行星大气的三维磁流体数值模拟研究,他们成功解释了多个系外行星系统在Ly-α 和 He I 10830 Å等不同波段的观测信号,并系统研究了不同物理因素在大气逃逸演化过程中的作用,对揭示系外行星大气的结构与演化机制具有重要意义。
云台邀请方:恒星物理研究团组
邀请方联系人:郭建恒
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