Mapping Habitable Planetary Environments with Exoplanet Imaging

利用系外行星成像绘制宜居行星环境图

• 批准号: 21H04998
• 负责人: Guyon Olivier
• 金额: $ 117.64万
• 依托单位: National Astronomical Observatory of Japan
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (S)
• 财政年份: 2021
• 资助国家: 日本
• 起止时间: 2021-07-05 至 2026-03-31
• 项目状态: 未结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-21H04998/
• 关键词: Exoplanet; Astronomy; Interferometry; Exoplanets; Photonic; Optical Fiber; Spectroscopy; Coronagraphy; Telescope; Adaptive Optics; Telescopes; adaptive optics; wavefront control; exoplanet; photonics; interferometry; spectroscopy

The goal of our research is to image close-in exoplanets around nearby stars using new photonics technologies. In FY2022, we have continued upgrades to the AO system at Subaru Telescope and validated achromatic phase shifters for the PNC. We have also observed close-in exoplanets.We are on track to make the Subaru Telescope the most capable exoplanet imaging facility for planets within ~10 a.u. of their stars. Specifically (1) By combining the PNC technology with high performance AO at near-IR wavelength, we will open up the small angular separation regime not previously accessible, (2) We will be the first 8+m facility to provide correction of 3000 modes at 2 kHz speed, (3) We will be the first large telescope to deploy the photonic nulling technology on-sky, with no other facility scheduled to do so within the next ~3yr, (4) The AO wavefront sensing we are developing for the project is significantly more sensitive than existing alternatives.Our team announced in FY2022 two major exoplanet discoveries. The AB Aurigae b planet (Currie et al. 2022, Nature Astronomy) is a still-accreting giant planet within the dust and gas disk of the AB Aur young star. The discovery is the best evidence for the gravitational instability planet formation model, where planets form as a gas cloud suddenly collapses under its own gravity. We reported discovery of the HIP 99770 b planet (Currie et al. 2023, Science) is the first exoplanet discovered by followup of targets identified by astrometric acceleration.

我们研究的目的是使用新的Photonics Technologies对附近恒星周围的近距离球星进行图像。在2022财年，我们继续升级到Subaru望远镜的AO系统，并验证了PNC的出色相位变速器。我们还观察到了近距离行星。我们正处于轨道上，使斯巴鲁望远镜成为〜10 a.u的行星最强大的系外行星成像设施。他们的星星。特别是（1）通过将PNC技术与近IR波长下的高性能AO相结合，我们将打开以前无法访问的小角度分离制度，（2）我们将成为第一个8+M的设施，以提供3000款模式的校正以2 kHz的速度，（3）我们将是第一个部署光子无效技术的大型望远镜，而没有其他设施在下一个〜3 yr中进行，（4）我们正在开发我们正在开发的AO Wavefront Sensing该项目比现有替代方案要敏感得多。我们的团队在2022财年宣布了两个主要系外行星。 Ab Aurigae B星球（Currie等，2022，Nature Astronomy）是AB Aur Young Star的灰尘和气盘内仍然固定的巨型行星。该发现是重力不稳定性行星形成模型的最佳证据，在其自身的重力下，行星形成的行星突然崩溃了。我们报道了发现HIP 99770 B行星（Currie等，2023，Science）是第一个通过随访通过天体加速度确定的目标发现的系外行星。

项目成果

Autodifferentiable Spectrum Model for High-dispersion Characterization of Exoplanets and Brown Dwarfs

用于系外行星和褐矮星高色散表征的自微谱模型

• DOI: 10.3847/1538-4365/ac3b4d
• 发表时间: 2022
• 期刊: The Astrophysical Journal Supplement Series
• 作者: Kawahara Hajime;Kawashima Yui;Masuda Kento;Crossfield Ian J. M.;Pannier Erwan;van den Bekerom Dirk
• 通讯作者: van den Bekerom Dirk

Images of embedded Jovian planet formation at a wide separation around AB Aurigae

• DOI: 10.1038/s41550-022-01634-x
• 发表时间: 2022-04
• 期刊: Nature Astronomy
• 影响因子: 14.1
• 作者: T. Currie;Kellen D. Lawson;G. Schneider;W. Lyra;J. Wisniewski;C. Grady;O. Guyon;Motohide Tamura-

Probing Photon Statistics in Adaptive Optics Images with SCExAO/MEC*

使用 SCExAO/MEC* 探测自适应光学图像中的光子统计数据

• DOI: 10.3847/1538-3881/ac922f
• 发表时间: 2022
• 期刊: The Astronomical Journal
• 作者: Steiger Sarah;Brandt Timothy D.;Guyon Olivier;Swimmer Noah;Walter Alexander B.;Bockstiegel Clinton;Lozi Julien;Deo Vincent;Vievard Sebastien;Skaf Nour;Ahn Kyohoon;Jovanovic Nemanja;Martinache Frantz;Mazin Benjamin A.
• 通讯作者: Mazin Benjamin A.

On-sky validation of image-based adaptive optics wavefront sensor referencing

基于图像的自适应光学波前传感器参考的空中验证

• DOI: 10.1051/0004-6361/202141514
• 发表时间: 2022
• 期刊: Astronomy & Astrophysics
• 作者: Skaf Nour;Guyon Olivier;Gendron ?ric;Ahn Kyohoon;Bertrou-Cantou Arielle;Boccaletti Anthony;Cranney Jesse;Currie Thayne;Deo Vincent;Edwards Billy;Ferreira Florian;Gratadour Damien;Lozi Julien;Norris Barnaby;Sevin Arnaud;Vidal Fabrice;Vievard S?bastien
• 通讯作者: Vievard S?bastien

High contrast imaging at the photon noise limit with WFS-based PSF calibration

通过基于 WFS 的 PSF 校准在光子噪声极限下进行高对比度成像

• DOI: 10.1117/12.2630503
• 发表时间: 2022
• 期刊: SPIE Proceedings
• 作者: Guyon Olivier;Norris Barnaby;Martinod Marc-Antoine;Ahn Kyohoon;Deo Vincent;Skaf Nour;Lozi Julien;Vievard Sebastien;Haffert Sebastiaan;Currie Thayne;Males Jared;Wong Alison;Tuthill Peter
• 通讯作者: Tuthill Peter