Project Horizon: Exploring the Atmosphere of Tidally-locked Worlds using High-resolution Spectroscopy

地平线项目：利用高分辨率光谱探索潮汐锁定世界的大气层

• 批准号: 22K14092
• 负责人: Nugroho Stevanus
• 金额: $ 2.91万
• 依托单位: Center for Novel Science Initatives, National Institutes of Natural Sciences
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Early-Career Scientists
• 财政年份: 2022
• 资助国家: 日本
• 起止时间: 2022-04-01 至 2025-03-31
• 项目状态: 未结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-22K14092/
• 关键词: exoplanet; atmosphere; non-homogeneous; high-resolution; spectroscopy

With the new datasets from IRD/Subaru, we confirmed our previously detected OH and atomic species on the day side of WASP-33b. We followed it up by resolving the 2 strongest vibrational bands of OH individually as a first step to searching for NLTE signature. From the same datasets, we found evidence of new detection of other atomic species and a non-homogeneous atmosphere indicated by a much weaker/non-detection of OH before than after the secondary eclipse. We constructed a framework to fit the evolution of the line contrast of the planetary spectrum with time using JAX+GPU and confirmed that the line contrast is much higher after the eclipse.We found no chemical species signature in the atmosphere of a warm super earth, GJ 486b, and excluding H2/He-dominated or a clear 100% water-vapour atmosphere by using IRD, SPIRou and IGRINS data. This potentially suggests that rocky planets around M-dwarf stars might have lost their atmospheres. Using ESPRESSO and UVES at the VLT, we found consistent relative abundance constraints in the WASP-121b transmission spectra across multiple observations demonstrating our robust technique that can be applied to future analyses.

利用 IRD/Subaru 的新数据集，我们确认了之前在 WASP-33b 的日侧检测到的 OH 和原子种类。随后，我们分别解析了 OH 的 2 个最强振动频带，作为搜索 NLTE 特征的第一步。从相同的数据集中，我们发现了新检测到其他原子种类和非均匀大气的证据，这表明在次日食之前比之后的 OH 更弱/未检测到。我们使用 JAX+GPU 构建了一个框架来拟合行星光谱的线对比度随时间的演变，并证实日食后线对比度要高得多。通过使用 IRD、SPIRou 和 IGRINS 数据，我们在温暖的超级地球 GJ 486b 的大气中没有发现化学物种特征，并且排除了以 H2/He 为主或清澈的 100% 水蒸气大气。这可能表明 M 矮星周围的岩石行星可能已经失去了大气层。在 VLT 上使用 ESPRESSO 和 UVES，我们在多次观测中发现 WASP-121b 透射光谱中存在一致的相对丰度约束，这证明了我们可以应用于未来分析的强大技术。

项目成果

High-resolution Transmission Spectroscopy of the Terrestrial Exoplanet GJ 486b

• DOI: 10.3847/1538-3881/acbd39
• 发表时间: 2022-12
• 期刊: The Astronomical Journal
• 作者: A. Ridden-Harper;S. K. Nugroho;L. Flagg;R. Jayawardhana;J. Turner;E. D. de Mooij;R. MacDonald;E. Deibert;Motohide Tamura;T. Kotani;T. Hirano;M. Kuzuhara;M. Omiya;N. Kusakabe

Unlocking the Day-side of Ultra Hot Jupiters: A NIR High-resolution Emission Spectroscopy Study of WASP-33b

解锁超热木星的白天面：WASP-33b 的近红外高分辨率发射光谱研究

• 发表时间: 2023
• 作者: Ridden-Harper;Andrew; Nugroho;Stevanus K.; Flagg;Laura; Jayawardhana;Ray; Turner;Jake D.; de Mooij;Ernst; MacDonald;Ryan; Deibert;Emily; Tamura;Motohide; Kotani;Takayuki; Hirano;Teruyuki; Kuzuhara;Masayuki; Omiya;Masashi; Kusakabe;Nobuhiko;Stevanus Kristianto Nugroho
• 通讯作者: Stevanus Kristianto Nugroho

Atomic and molecular species in the near-infrared emission spectrum of WASP-33b

WASP-33b 近红外发射光谱中的原子和分子种类

• 发表时间: 2022
• 作者: Ridden-Harper;Andrew; Nugroho;Stevanus K.; Flagg;Laura; Jayawardhana;Ray; Turner;Jake D.; de Mooij;Ernst; MacDonald;Ryan; Deibert;Emily; Tamura;Motohide; Kotani;Takayuki; Hirano;Teruyuki; Kuzuhara;Masayuki; Omiya;Masashi; Kusakabe;Nobuhiko;Stevanus Kristianto Nugroho;Stevanus Kristianto Nugroho
• 通讯作者: Stevanus Kristianto Nugroho

The day-side atmosphere of WASP-33b seen through the InfraRed Doppler instrument

通过红外多普勒仪器看到的 WASP-33b 白天大气

• 发表时间: 2022
• 作者: Ridden-Harper;Andrew; Nugroho;Stevanus K.; Flagg;Laura; Jayawardhana;Ray; Turner;Jake D.; de Mooij;Ernst; MacDonald;Ryan; Deibert;Emily; Tamura;Motohide; Kotani;Takayuki; Hirano;Teruyuki; Kuzuhara;Masayuki; Omiya;Masashi; Kusakabe;Nobuhiko;Stevanus Kristianto Nugroho;Stevanus Kristianto Nugroho;Stevanus Kristianto Nugroho
• 通讯作者: Stevanus Kristianto Nugroho

High-resolution atmospheric retrievals of WASP-121b transmission spectroscopy with ESPRESSO: Consistent relative abundance constraints across multiple epochs and instruments

使用 ESPRESSO 对 WASP-121b 透射光谱进行高分辨率大气反演：跨多个时代和仪器的一致相对丰度约束

• DOI: 10.1093/mnras/stac3388
• 发表时间: 2023
• 期刊: Monthly Notices of the Royal Astronomical Society
• 影响因子: 4.8
• 作者: Maguire;Cathal; Gibson;Neale P.; Nugroho;Stevanus K.; Ramkumar;Swaetha ; Fortune;Mark ; Merritt;Stephanie R. ; de Mooij;Ernst
• 通讯作者: Ernst