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

Title: SDSS 星系光谱类型的形态特征距离

Abstract: This study investigates the morphological feature distances among various spectral types of galaxies from the Sloan Digital Sky Survey (SDSS), 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 SF type in the dwarf regime $-18 > M_r > -20$, compared to $<$15% closer in the massive regime $M_r < -21$. The continuous probability analysis for being Hubble types of the spectral types upholds the distance analysis results having a range of the probability distribution of AGN types similar to quiescent type, especially in dwarf galaxies. Show Chinese abstract

Abstract: 本研究调查了来自斯隆数字巡天（SDSS）的多种光谱类型星系之间的形态特征距离，包括强和弱活动星系核（AGN）、类星体（QSO）、宁静星系和恒星形成星系。 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，AGN 和 QSO 比恒星形成星系与宁静星系更为接近，表明 AGN 活动可能对恒星形成起到潜在的调控作用。 此外，分析强调了AGN反馈在矮星系区的作用，在矮星系区$-18 > M_r > -20$中，AGN类型与静止型的距离比与SF型的距离近$\sim$10~50%，而在大质量星系区$M_r < -21$中，AGN类型与静止型的距离近$<$15%。对光谱类型为哈勃类型的连续概率分析支持距离分析结果，即AGN类型的概率分布范围与静止型相似，尤其是在矮星系中。