Stellar Spin-Orbit Misalignment in Multiplanet System Around Active Stars (Both hot and cool stars)

活跃恒星（热恒星和冷恒星）周围多行星系统中的恒星自旋轨道错位

• 批准号: 273970133
• 负责人: Dr. Mahmoudreza Oshagh, Ph.D.
• 金额: --
• 依托单位: Institut für Astrophysik und Geophysik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2015
• 资助国家: 德国
• 起止时间: 2014-12-31 至 2018-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/273970133?language=en
• 关键词: Stellar; Spin; Orbit; Misalignment; Multiplanet

Understanding the orbital architecture of extra-solar planetary systems is the main goal of my proposed project, the result of which will provide strong constrains on the planetary formation and evolution models. In this project, first I aim to expand the sample of known spin-orbit angle measurements (one of the most important parameter of the planetary orbital architecture) by determining accurately the spin-orbit angle of transiting multi-planet systems around active stars, to do this I will use both the photometric (spot-occultation) and the spectroscopic (Rossiter-McLaughlin effect) techniques. Furthermore, I will probe the impact of stellar activity on the spin-orbit angle estimation through Rossiter-McLaughlin effect observations. Finally, I will perform simultaneous Rossiter-McLaughlin effect and photometric transit observations of a transiting planet orbiting active stars. Combining those observations will allow to break degeneracies on determination of the stellar active region parameters, and thus I will be able to estimate precisely actual spin-orbit angle.

了解太阳系外行星系统的轨道结构是我提出的项目的主要目标，其结果将提供强有力的约束行星形成和演化模型。在这个项目中，首先，我的目标是通过精确地确定围绕活跃恒星的凌日多行星系统的自旋轨道角来扩大已知的自旋轨道角测量（行星轨道结构的最重要参数之一）的样本，为此，我将使用测光（点掩星）和光谱（Rossiter-McLaughlin效应）技术。此外，我将探讨恒星活动的影响，通过Rossiter-McLaughlin效应观测的自旋轨道角估计。最后，我将同时进行罗西特-麦克劳克林效应和光度凌日观测的凌日行星轨道活动的恒星。结合这些观测结果将允许在确定恒星活动区参数时打破简并，因此我将能够精确地估计实际的自旋轨道角。

项目成果

How eclipse time variations, eclipse duration variations and radial velocities can reveal S-type planets in close eclipsing binaries

• DOI: 10.1093/mnras/stw3313
• 发表时间: 2016-10
• 期刊: Monthly Notices of the Royal Astronomical Society
• 影响因子: 4.8
• 作者: M. Oshagh;R. Heller;S. Dreizler

MODELING THE ROSSITER–MCLAUGHLIN EFFECT: IMPACT OF THE CONVECTIVE CENTER-TO-LIMB VARIATIONS IN THE STELLAR PHOTOSPHERE

• DOI: 10.3847/0004-637x/819/1/67
• 发表时间: 2016-01
• 期刊: The Astrophysical Journal
• 作者: H. Cegla;M. Oshagh;M. Oshagh;Christopher A. Watson;P. Figueira;Nuno C. Santos;Sergiy Shelyag

Can stellar activity make a planet seem misaligned

恒星活动会让行星看起来错位吗

• DOI: 10.1051/0004-6361/201628728
• 发表时间: 2016
• 期刊: arXiv: Earth and Planetary Astrophysics
• 作者: M. Oshagh;S. Dreizler;N. C. Santos;P. Figueira;A. Reiners
• 通讯作者: A. Reiners

Detection of titanium oxide in the atmosphere of a hot Jupiter

• DOI: 10.1038/nature23651
• 发表时间: 2017-09
• 期刊: Nature
• 影响因子: 64.8
• 作者: E. Sedaghati;H. Boffin;R. MacDonald;S. Gandhi;N. Madhusudhan;N. Gibson;M. Oshagh;A. Claret;H. Rauer

Activity induced variation in spin-orbit angles as derived from Rossiter–McLaughlin measurements

• DOI: 10.1051/0004-6361/201833709
• 发表时间: 2018-09
• 期刊: Astronomy & Astrophysics
• 影响因子: 6.5
• 作者: M. Oshagh;A. Triaud;A. Burdanov;P. Figueira;A. Reiners;Nuno C. Santos;J. Faria;G. Boué;R. Díaz;S. Dreizler;S. Boldt;L. Delrez;E. Ducrot;M. Gillon;A. G. Mesa;E. Jehin;S. Khalafinejad;S. Kohl;L. Serrano;S. Udry