大气湍流在天文图像中的光学效应

IF 1.3 4区物理与天体物理 Q3 ASTRONOMY & ASTROPHYSICS

Comptes Rendus Physique Pub Date : 2023-02-08 DOI:10.5802/crphys.101

D. Bonneau

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引用次数: 3

摘要

．天文图像在望远镜焦点上的模糊现象是由于大气的扰动造成的。对光在湍流地球大气中的传播的研究，使人们认识到伴随光线折射而产生的折射率现象所导致的光学湍流的存在。光学湍流用参量(弗里德参量、等行星角、相干时间、外标度)来描述，这些参量表征了望远镜瞳孔上波前的幅值和相位。我们推断了在望远镜焦点处形成的图像(短曝光或长曝光)的特性，以及湍流对这些图像(闪烁、搅拌、扩散)和干涉观测(活塞效应)的影响的描述。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Les effets optiques de la turbulence atmosphérique dans les images astronomiques

. The often blurry appearance of astronomical images at a telescope focus is attributed to atmospheric agitation. The study of the light propagation through the turbulent Earth atmosphere has made it possible to understand the existence of optical turbulence resulting from di ff raction phenomena that accompany the refraction of light rays. Optical turbulence is described by parameters (Fried parameter, isoplanetism angle, coherence time, external scale) which characterize the amplitude and the phase of the wave front on the telescope pupil. We deduce the properties of the images (short or long exposure) formed at the telescope focus as well as the description of the e ff ects of turbulence on these images (scintillation, agitation, spreading) and on interferometric observations (piston e ff ect)

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来源期刊

Comptes Rendus Physique 物理-天文与天体物理

CiteScore

2.80

自引率

0.00%

发文量

审稿时长

17.2 weeks

期刊介绍： The Comptes Rendus - Physique are an open acess and peer-reviewed electronic scientific journal publishing original research article. It is one of seven journals published by the Académie des sciences. Its objective is to enable researchers to quickly share their work with the international scientific community. The Comptes Rendus - Physique also publish journal articles, thematic issues and articles on the history of the Académie des sciences and its current scientific activity. From 2020 onwards, the journal''s policy is based on a diamond open access model: no fees are charged to authors to publish or to readers to access articles. Thus, articles are accessible immediately, free of charge and permanently after publication. The Comptes Rendus - Physique (8 issues per year) cover all fields of physics and astrophysics and propose dossiers. Thanks to this formula, readers of physics and astrophysics will find, in each issue, the presentation of a subject in particularly rapid development. The authors are chosen from among the most active researchers in the field and each file is coordinated by a guest editor, ensuring that the most recent and significant results are taken into account. In order to preserve the historical purpose of the Comptes Rendus, these issues also leave room for the usual notes and clarifications. The articles are written mainly in English.