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The Ariel 0.6 - 7.8 μ m stellar limb-darkening coefficients
Experimental Astronomy ( IF 3 ) Pub Date : 2021-04-12 , DOI: 10.1007/s10686-021-09740-w
Giuseppe Morello , Camilla Danielski , Subhajit Sarkar

We provide here tables of stellar limb-darkening coefficients (LDCs) for the Ariel ESA M4 space mission. These tables include LDCs corresponding to different wavelength bins and white bands for the NIRSpec, AIRS-Ch0 and AIRS-Ch1 spectrographs, and those corresponding to the VISPhot, FGS1 and FGS2 photometers. The LDCs are calculated with the open-source software ExoTETHyS for three complete grids of stellar atmosphere models obtained with the ATLAS9 and PHOENIX codes. The three model grids are complementary, as the PHOENIX code adopts more modern input physics and spherical geometry, while the models calculated with ATLAS9 cover wider ranges of stellar parameters. The LDCs obtained from corresponding models in the ATLAS9 and PHOENIX grids are compared in the main text. All together the models cover the following ranges in effective temperature (1500KTeff ≤ 50000K), surface gravity (0.0 dex \(\le \log {g} \le 6.0\) dex), and metallicity (− 5.0 ≤ [M/H] ≤ 1.0).



中文翻译:

Ariel 0.6-7.8μm恒星肢变暗系数

我们在此处提供Ariel ESA M4太空任务的恒星残肢变暗系数(LDC)表。这些表包括与NIRSpec,AIRS-Ch0和AIRS-Ch1光谱仪的不同波长段和白带相对应的LDC,以及与VISPhot,FGS1和FGS2光度计相对应的LDC。使用开源软件ExoTETHyS为使用ATLAS9PHOENIX代码获得的三个完整的恒星大气模型网格计算最不发达国家。这三个模型网格是互补的,因为PHOENIX代码采用了更现代的输入物理和球面几何,而使用ATLAS9计算的模型涵盖更广泛的恒星参数范围。在正文中比较了从ATLAS9PHOENIX网格中的相应模型获得的LDC 。总之模型覆盖有效的温度在下列范围(1500 ķŤ EFF ≤50000 ķ),表面比重(0.0 DEX \(\文件\日志{G} \勒6.0 \) DEX),和金属度( - 5.0≤ [ M / H ]≤1.0)。

更新日期:2021-04-12
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