标题： 开源高分辨率系外行星大气检索工具POSEIDON 显示英文标题

标题： Open Source High-Resolution Exoplanet Atmosphere Retrievals with POSEIDON

摘要： 高分辨率光谱学（R > 25,000）为从地面表征系外行星大气提供了新的机会。通过解析行星发射和传输光谱中的单个谱线，可以敏感地探测系外行星的化学成分和温度结构。然而，从高分辨率数据集可靠且可重复地推断大气的一个重大挑战是缺乏开源的高分辨率检索代码。在这里，我们提出了一种统一的高分辨率检索框架，适用于发射和传输光谱学，并在开源POSEIDON检索代码中公开提供。我们的高分辨率检索框架速度快（通常< 12小时），易于访问（无需GPU），并且通过Python笔记本进行了充分的文档记录。我们通过重现热木星WASP-77Ab的发射检索和超热木星WASP-121b的传输检索来验证我们的框架。当采用相同的数据趋势假设时，我们的结果与已发表工作的结果大致一致，但我们证明了用户选择可以微妙地影响检索到的化学丰度。 显示英文摘要

摘要： High-resolution spectroscopy (R > 25,000) has opened new opportunities to characterize exoplanet atmospheres from the ground. By resolving individual lines in planetary emission and transmission spectra, one can sensitively probe the chemical inventory and temperature structure of exoplanets. However, a significant challenge to reliable and reproducible atmospheric inferences from high-resolution datasets has been the lack of open source codes for high-resolution retrievals. Here, we present a unified high-resolution retrieval framework, for both emission and transmission spectroscopy, made publicly available within the open source POSEIDON retrieval code. Our high-resolution retrieval framework is fast (typically < 12 hours), accessible (no GPUs required), and well-documented via Python notebooks. We validate our framework by reproducing previous emission retrievals of the hot Jupiter WASP-77Ab and transmission retrievals of the ultra-hot Jupiter WASP-121b. Our results are broadly consistent with those of published works when making the same data detrending assumptions, but we demonstrate that user choices can subtly propagate into retrieved chemical abundances.