标题： 彗星的光学光谱学 显示英文标题

标题： Optical spectroscopy of comets

摘要： 彗星是太阳系的原始遗迹，由尘埃和冰组成。 由于温度较低，它们在轨道上的大部分时间都处于不活跃且不可探测的状态。 然而，当它们接近太阳时，挥发性材料会升华，释放出尘埃并形成可见的彗发。 对彗星的光谱观测有助于同时研究气体发射和来自尘埃颗粒的反射阳光。 通过使用长狭缝，可以分析分子发射的空间变化，以便进一步用于其他计算。 此外，空间信息有助于提取 Af(rho) 参数的特征轮廓，揭示尘埃发射行为的见解。 足够长的狭缝在提取不同部分彗发甚至彗尾的发射信息方面具有优势。 通过利用长狭缝的帮助，采用低分辨率光谱学可以全面了解彗星的化学成分和尘埃发射。 显示英文摘要

摘要： Comets are pristine remnants of the Solar system, composed of dust and ice. They remain inactive and undetectable for most of their orbit due to low temperatures. However, as they approach the Sun, volatile materials sublimate, expelling dust and creating a visible coma. Spectroscopic observations of comets help the simultaneous study of both the gas emissions and reflected sunlight from dust particles. By implementing a long slit, the spatial variations in molecular emissions can be analysed to be further used for other computations. Additionally, spatial information aids in extracting the characteristic profile of the Af(rho) parameter, revealing insights into the behaviour of dust emissions. A sufficiently long slit would prove advantageous in extracting information about the emissions occurring at different parts of the coma or even the tail. We can gain an overall comprehensive understanding of a comet's chemical composition and dust emission by constructively utilising low-resolution spectroscopy with the help of a long slit.