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北美退伍军人节(Veterans Day),12 日无更新
arXiv 2106.03081astro-ph.GA
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高纬消光的近似解析描述

Approximate analytical description of the high latitude extinction

Alexei Nekrasov, Kirill Grishin, Dana Kovaleva, Oleg Malkov

摘要:

利用现有的LAMOST DR 5和Gaia DR 2/EDR 3数据,在北方天空的选定区域绘制了星际消光视$A_V$的分布图。$A_V$被模拟为银河纬度和距离的气压函数。然后用球谐函数逼近函数参数。由此产生的分析三维模型的星际消光可以用来预测$A_V$值的恒星与已知的视差,以及总的银河系消光在一个给定的位置在天空中。

英文摘要:

The distribution of visual interstellar extinction $A_V$ has been mapped in selected areas over the Northern sky, using available LAMOST DR5 and Gaia DR2/EDR3 data. $A_V$ was modelled as a barometric function of galactic latitude and distance. The function parameters were then approximated by spherical harmonics. The resulting analytical tridimensional model of the interstellar extinction can be used to predict $A_V$ values for stars with known parallaxes, as well as the total Galactic extinction in a given location in the sky.

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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