The structure of our Galaxy has been studied from ultraviolet (UV) star counts obtained with the Ultra-Violet Imaging Telescope (UVIT) on board the AstroSat satellite, in Far-UV (FUV) and Near-UV (NUV) bands. The F154W (BaF₂) and N263M (NUVB4) filters were used in the FUV and NUV bands, respectively. The point sources are separated from the extra-galactic sources of UVIT observations using infrared (IR) color cut method. The observed UVIT star counts match well with the simulations obtained from the Besançon model of stellar population synthesis towards several Galactic directions. We also estimated the scale length and scale height of the thick disc and the scale height of the thin disc using the space density function and the exponential density law for the stars of intermediate galactic latitudes. The scale length of the thick disc ranges from 3.11 to 5.40 kpc whereas the scale height ranges from \(530\pm 32\) pc to \(630\pm 29\) pc. The scale height of the thin disc comes out to be in the range of \(230\pm 20\) pc to \(330\pm 11\) pc.

我们银河系的结构已经通过远紫外 (FUV) 和近紫外 (NUV) 波段的远紫外 (FUV) 和近紫外 (NUV) 波段的 AstroSat 卫星上的紫外成像望远镜 (UVIT) 获得的紫外 (UV) 恒星计数进行了研究。F154W (BaF ₂) 和 N263M (NUVB4) 滤光片分别用于 FUV 和 NUV 波段。使用红外 (IR) 颜色切割方法将点源与 UVIT 观测的星系外源分开。观察到的 UVIT 恒星数量与从贝桑松模型中获得的模拟结果很好地匹配，该模型是朝着几个银河系方向的恒星群合成。我们还利用空间密度函数和银河系中纬度恒星的指数密度定律估计了厚盘的标尺长度和标高以及薄盘的标高。厚盘的刻度长度范围为 3.11 至 5.40 kpc，而刻度高度范围为\(530\pm 32\) pc 至\(630\pm 29\) pc。薄盘的刻度高度在范围内\(230\pm 20\)电脑到\(330\pm 11\)电脑。