The VSPEC Collection: A suite of utilities to model spectroscopic phase curves of 3D exoplanet atmospheres in the presence of stellar variability

IF 1.9 4区物理与天体物理 Q2 ASTRONOMY & ASTROPHYSICS

Astronomy and Computing Pub Date : 2024-11-06 DOI:10.1016/j.ascom.2024.100890

Ted M. Johnson , Cameron Kelahan , Avi M. Mandell , Ashraf Dhahbi , Tobi Hammond , Thomas Barclay , Veselin B. Kostov , Geronimo L. Villanueva

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引用次数: 0

Abstract

We present the Variable Star PhasE Curve (VSPEC) Collection, a set of Python packages for simulating combined-light spectroscopic observations of 3-dimensional exoplanet atmospheres in the presence of stellar variability and inhomogeneity. VSPEC uses the Planetary Spectrum Generator’s Global Emission Spectra (PSG/GlobES) application along with a custom-built multi-component time-variable stellar model based on a user-defined grid of stellar photosphere models to produce spectroscopic light curves of the planet-host system. VSPEC can be a useful tool for modeling observations of exoplanets in transiting geometries (primary transit, secondary eclipse) as well as orbital phase curve measurements, and is built in a modular and flexible configuration for easy adaptability to new stellar and planetary model inputs. We additionally present a set of codes developed alongside the core VSPEC modules, including the stellar surface model generator vspec-vsm, the stellar spectral grid interpolation code GridPolator, and a Python interface for PSG, libpypsg.

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VSPEC 系列：在恒星变异情况下模拟三维系外行星大气光谱相位曲线的实用程序套件

我们介绍了变星相变曲线（VSPEC）系列，这是一套用于模拟存在恒星变异性和不均匀性的三维系外行星大气的组合光光谱观测的 Python 软件包。VSPEC 使用行星光谱生成器的全球发射光谱（PSG/GlobES）应用程序，以及基于用户定义的恒星光球模型网格定制的多成分时变恒星模型，生成行星-宿主系统的光谱光曲线。VSPEC 是一个有用的工具，可用于对系外行星的凌日几何观测（主凌日、副食）以及轨道相位曲线测量进行建模，它采用模块化的灵活配置，易于适应新的恒星和行星模型输入。此外，我们还介绍了一套与 VSPEC 核心模块同时开发的代码，包括恒星表面模型生成器 vspec-vsm、恒星光谱网格插值代码 GridPolator 和 PSG 的 Python 接口 libpypsg。

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来源期刊

Astronomy and Computing ASTRONOMY & ASTROPHYSICSCOMPUTER SCIENCE,-COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS

CiteScore

4.10

自引率

8.00%

发文量

期刊介绍： Astronomy and Computing is a peer-reviewed journal that focuses on the broad area between astronomy, computer science and information technology. The journal aims to publish the work of scientists and (software) engineers in all aspects of astronomical computing, including the collection, analysis, reduction, visualisation, preservation and dissemination of data, and the development of astronomical software and simulations. The journal covers applications for academic computer science techniques to astronomy, as well as novel applications of information technologies within astronomy.