Title: Morphological Feature Distances Among the Spectral Types of SDSS Galaxies Show Chinese title

Title: SDSS 星系光谱类型之间的形态特征距离

Abstract: This study investigates the morphological feature distances among various spectral types of galaxies from the Sloan Digital Sky Survey, including strong and weak active galactic nuclei (AGN), quasi-stellar objects (QSO), quiescent, and star-forming galaxies. We evaluated the clustering and relative distances of these spectral types in the multidimensional morphological feature space. The results indicate that AGN and QSOs are more closely associated with quiescent galaxies than with star-forming ones, indicating a potential regulation of star formation by AGN activity. Furthermore, the analysis underlines the role of AGN feedback in the dwarf regime having $\sim$10%-50% closer distances from AGN types to the quiescent type than to the star-forming type in the dwarf regime $-18 > M_r > -20$, compared to $<$15% closer in the massive regime $M_r < -21$. The continuous probability analysis of spectral types being Hubble types upholds the distance analysis results having a range of the probability distribution of AGN types similar to the quiescent type, especially in dwarf galaxies. Show Chinese abstract

Abstract: 本研究调查了来自斯隆数字巡天的各类星系的形态特征距离，包括强和弱活动星系核（AGN）、类星体（QSO）、宁静星系以及恒星形成星系。 我们评估了这些光谱类型在多维形态特征空间中的聚类和相对距离。 结果显示，与宁静星系相比，AGN 和 QSO 更接近于宁静星系而非恒星形成星系，表明 AGN 活动可能对恒星形成起到潜在的调节作用。 此外，分析强调了 AGN 反馈在矮星系范围内的作用，在矮星系范围内，AGN 类型到宁静类型的平均距离比到恒星形成类型的平均距离近$\sim$10%-50%，而在大质量星系范围内则为$<$近 15%（$-18 > M_r > -20$,$M_r < -21$）。 光谱类型为哈勃类型的连续概率分析支持了距离分析的结果，特别是在矮星系中，AGN 类型的概率分布范围与宁静类型相似。