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arXiv 2602.02728astro-ph.EPastro-ph.IM
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类金星世界的成像:用于宜居世界观测站的光谱、偏振和紫外诊断

Imaging Venus-like Worlds: Spectral, Polarimetric, and UV Diagnostics for the Habitable Worlds Observatory

University of California, Riverside(加州大学河滨分校);SETI Institute(SETI研究所);University of Central Florida(中佛罗里达大学);Space Research Institute, Austrian Academy of Sciences(奥地利科学院空间研究所);Washington University, St. Louis(华盛顿大学(圣路易斯));Université Paris-Saclay(巴黎萨克雷大学);Université Paris Cité(巴黎西岱大学)
Stephen R. Kane, Kimberly M. Bott, Kenneth E. Goodis Gordon, Emma L. Miles, Colby M. Ostberg, Paul K. Byrne, Ludmila Carone, Tansu Daylan, Antonio Garcia Munoz,… 展开作者

Stephen R. Kane, Kimberly M. Bott, Kenneth E. Goodis Gordon, Emma L. Miles, Colby M. Ostberg, Paul K. Byrne, Ludmila Carone, Tansu Daylan, Antonio Garcia Munoz, Caleb K. Harada, Renyu Hu, Noam. R. Izenberg, Erika Kohler, Malena Rice, Sabina Sagynbayeva, Manuel Scherf, Edward W. Schwieterman, Peter Woitke

AI总结:

本文提出利用HWO观测站对金星带和宜居带地球型系外行星进行光谱、偏振和紫外诊断,以研究其大气化学和云微物理特征。

摘要:

理解行星宜居性需要一种比较方法,探索地球和金星的不同演化结果。宜居世界观测站(HWO)将唯一地能够对横跨金星带(VZ)和宜居带(HZ)的地球型系外行星进行统计和物理普查,从而检测并表征后 runaway greenhouse 世界(“exoVenuses”)。我们提供了一份更新的金星带系外行星列表,将已知候选者数量提高到370个。我们描述了针对金星带系外行星的科学案例和观测策略,该策略整合了先驱系外行星检测数据和恒星表征与HWO直接成像、紫外/光学/红外光谱以及光谱偏振测量。我们提出的框架强调了通往诊断硫化学(SO₂)和气溶胶物理(H₂SO₄云层/雾霾)的路径,以及行星氧化还原状态(O₂/O₃假阳性来自氢丢失)和云微物理检测(彩虹偏振)。我们量化了对HWO需求的影响,包括紫外波段0.2-0.4 μm的访问能力,光学/近红外波段覆盖至>1.5 μm,内工作角(IWA)达到0.3-1.5 AU范围内的邻近太阳型恒星,以及关键特征所需的信噪比/分辨率。最后,我们概述了社区驱动的路径,以产生稳健的人口推断和目标选择,以优化HWO观测。

英文摘要:

Understanding planetary habitability requires a comparative approach that explores the divergent evolutionary outcomes of Earth and Venus. The Habitable Worlds Observatory (HWO) will be uniquely positioned to conduct a statistical and physical census of terrestrial exoplanets spanning the Venus Zone (VZ) and the Habitable Zone (HZ), enabling the detection and atmospheric characterization of post-runaway greenhouse worlds (``exoVenuses''). We present an updated list of VZ exoplanets, which raises the number of known candidates to 370. We describe a science case and an observing strategy for VZ exoplanets that integrates precursor exoplanet detection data and stellar characterization with HWO direct imaging, spectroscopy across the UV/optical/IR, and spectropolarimetry. Our proposed framework emphasizes a pathway toward the diagnosis of sulfur chemistry (SO$_2$) and aerosol physics (H$_2$SO$_4$ clouds/hazes), planetary redox states (O$_2$/O$_3$ false positives from hydrogen loss), and cloud microphysics detection (rainbow polarization). We quantify implications for HWO requirements, including UV access to 0.2--0.4 $μ$m, optical/NIR coverage to $\gtrsim$1.5 $μ$m, inner working angle (IWA) reaching 0.3--1.5 AU around nearby Sun-like stars, and the SNR/resolution needed for key features. Finally, we outline a community-driven path to producing robust demographic inferences and target selection for optimizing HWO observations.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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