GalRotpy is an educational Python-based visual tool, which is useful to understand how is the contribution of each mass components to the gravitational potential of disk-like galaxies and in the corresponding rotation curve. The standard gravitational potential of disk-like galaxies can be built by the contribution of a Miyamoto-Nagai potential model for both bulge/core and thin disk together with an NFW (NavarroFrenkWhite) potential or Burkert (for cored density profile) potential for the Dark Matter halo. The GalRotpy tool can give a first approximation of the galaxy rotation curve using the following schemes: (i ) a bulge model, (ii ) a thin or thick disk (iii ) and an exponential disk model for the stellar component and (iv ) a Dark Matter halo. The axisymmetric gravitational potential calculations are based on galpy package. After a brief review of gravitation potential theory, we focus on the construction of the rotation curves of disk-like galaxies. We present two study cases, the rotation curves of NGC6361 and M33 galaxies. According to the results found, GalRotpy is useful to modeling rotation curves and estimate realistic gravitational parameters of galaxies. It can be used for the Milky Way galaxy and other extragalactic sources.

中文翻译：

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GalRotpy：一种参数化盘状星系引力势的工具

GalRotpy 是一个基于 Python 的教育可视化工具，它有助于理解每个质量分量对盘状星系的引力势的贡献以及在相应的旋转曲线中的贡献。盘状星系的标准引力势可以通过 Miyamoto-Nagai 势模型对凸起/核心和薄盘的贡献以及 NFW（NavarroFrenkWhite）势或 Burkert（用于核密度剖面）势来构建物晕。GalRotpy 工具可以使用以下方案给出星系旋转曲线的第一近似值：(i) 凸出模型，(ii) 薄或厚圆盘 (iii) 和恒星成分的指数圆盘模型和 (iv) a暗物质光环。轴对称重力势计算基于 galpy 包。在简要回顾了引力势理论之后，我们将重点放在盘状星系旋转曲线的构建上。我们展示了两个研究案例，NGC6361 和 M33 星系的旋转曲线。根据发现的结果，GalRotpy 可用于建模旋转曲线和估计星系的真实引力参数。它可用于银河系和其他河外源。