arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2005.14160astro-ph.IM
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在Observatorio del Teide恢复夜空的黑暗:Illumina模型版本2的首次应用

Restoring the night sky darkness at Observatorio del Teide: First application of the model Illumina version 2

Martin Aubé, Alexandre Simoneau, Casiana Munoz-Tunon, Javier Diaz-Castro, Miquel Serra-Ricart

摘要:

人造光在真实环境中的传播是复杂的。为了准确地进行数值建模,必须考虑照明设备及其地理位置的高光谱特性、地面反射率的高光谱特性、小规模障碍物的大小和分布、地形的阻挡效应、灯的角度光度学和大气传递函数(气溶胶和分子)。详细的辐射转移模型可以用于评估照明基础设施中的特定变化如何影响天空辐射。在本文中,我们使用新版本(V2)的Illumina模型,以评估位于西班牙特内里费岛的泰德天文台的夜空恢复计划。在过去的几十年里,特内里费岛的天空黑暗严重恶化,光污染日益严重。在这项工作中,我们使用的贡献地图的影响,每个像素的领土的人工天空辐射。我们利用Illumina V2的高光谱功能,并展示了如何根据约翰逊-费洛蒙的光度带光谱灵敏度将贡献图整合到区域或城市。在完全关闭和转换为发光二极管后,每个城市的天空亮度减少量在约翰逊-格林B,V,R波段计算。我们发现,根据现行的转换策略,特内里费岛的照明基础设施与LED(1800 K和2700 K)的转换将导致天顶V波段天空亮度降低约0.3 mag arcsec-2。

英文摘要:

The propagation of artificial light into real environments is complex. To perform its numerical modelling with accuracy one must consider hyperspectral properties of the lighting devices and their geographic positions, the hyperspectral properties of the ground reflectance, the size and distribution of small-scale obstacles, the blocking effect of topography, the lamps angular photometry and the atmospheric transfer function (aerosols and molecules). A detailed radiative transfer model can be used to evaluate how a particular change in the lighting infrastructure may affect the sky radiance. In this paper, we use the new version (v2) of the Illumina model to evaluate a night sky restoration plan for the Teide Observatory located on the island of Tenerife, Spain. In the past decades, the sky darkness was severely degraded by growing light pollution on the Tenerife Island. In this work, we use the contribution maps giving the effect of each pixel of the territory to the artificial sky radiance. We exploit the hyperspectral capabilities of Illumina v2 and show how the contribution maps can be integrated over regions or municipalities according to the Johnson-Cousins photometric bands spectral sensitivities. The sky brightness reductions per municipality after a complete shutdown and a conversion to Light-Emitting Diodes are calculated in the Johnson-Cousins B, V, R bands. We found that the conversion of the lighting infrastructure of Tenerife with LED (1800K and 2700K), according to the conversion strategy in force, would result in a zenith V band sky brightness reduction of about 0.3 mag arcsec-2.

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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