发表机构
Yerevan State University; Institute of Physics, Yerevan State University; Alikhanian National Science Laboratory; Center for Cosmology and Astrophysics, Alikhanian National Science Laboratory; Universidade do Porto; Instituto de Astrofísica e Ciências do Espaço, Universidade do Porto; Faculdade de Ciências, Universidade do Porto（埃里温国立大学; 埃里温国立大学物理研究所; 阿利哈尼扬国家科学实验室; 阿利哈尼扬国家科学宇宙学与天体物理学中心; 波尔图大学; 波尔图大学空间与天体物理研究所; 波尔图大学理学院）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
该研究以MaNGA巡天的843个近邻盘星系为样本，发现恒星质量和颜色是AGN活动的主要驱动因素，强棒会提升AGN占比，旋臂形态影响较弱且需与棒共同作用才明显。
AI 中文摘要
我们研究近邻旋涡星系中活动星系核（AGN）活动对棒强度和旋臂形态的依赖关系，特别着重于在控制星系恒星质量和颜色的同时，区分两者各自及共同的影响。我们从MaNGA巡天中构建了一个包含843个形态未受扰动的Sa-Sd型星系的样本，红移范围为$0.026 \leq z \leq 0.1$。棒强度、恒星质量、颜色和AGN分类均取自文献，而旋臂分类（ACs）即絮状型（FL）、多臂型（MA）或 grand-design（GD）系统，是通过光学成像结合核球-盘分解残差图对整个样本进行目视确定的。AGN占比随棒强度呈系统性增长，从未受棒扰动星系的$0.10^{+0.02}_{-0.02}$上升至强棒系统的$0.34^{+0.03}_{-0.03}$。在控制恒星质量和颜色后，统计显著的增强主要出现在中等恒星质量区间，而在更高质量区间未发现显著依赖关系。相比之下，一旦控制恒星质量和颜色，旋臂形态本身并未显示出与AGN活动的稳健独立关联，尽管中等质量的GD和MA系统中存在微弱增强。当同时考虑棒强度和旋臂AC时，强棒GD+MA星系的AGN占比最高（$0.39^{+0.04}_{-0.04}$），而未受棒扰动的FL系统的AGN占比最低（$0.09^{+0.03}_{-0.02}$）。我们的结果表明，恒星质量和颜色是驱动近邻盘星系AGN活动的主要趋势，而恒星棒和旋臂是次要结构驱动因素；旋臂形态的影响较弱，且在与棒共同考虑时最为明显。
英文摘要
(abridged) We investigate the dependence of AGN activity on bar strength and spiral arm morphology in nearby spiral galaxies, with a particular emphasis on disentangling their individual and joint effects while controlling for galaxy stellar mass and color. We constructed a sample of 843 morphologically undisturbed Sa-Sd galaxies from the MaNGA survey in the redshift range $0.026 \leq z \leq 0.1$. Bar strengths, stellar masses, colors, and AGN classes were adopted from the literature, while spiral arm classes (ACs), i.e., flocculent (FL), multi-armed (MA), and grand design (GD) systems, were visually determined for the entire sample using optical imaging together with bulge-disk decomposition residual maps. The AGN fraction increases systematically with bar strength, from $0.10^{+0.02}_{-0.02}$ in unbarred galaxies to $0.34^{+0.03}_{-0.03}$ in strongly barred systems. After controlling for stellar mass and color, a statistically significant enhancement remains detectable primarily at intermediate stellar masses ($10.5 \lesssim \log(M_\star/M_\odot) \lesssim 11.0$), whereas no significant dependence is found at higher masses. In contrast, spiral arm morphology alone does not show a robust independent connection with AGN activity once stellar mass and color are controlled, although a weak enhancement is present in intermediate-mass GD and MA systems. When bar strength and spiral AC are considered jointly, the highest AGN fraction is observed in strongly barred GD$+$MA galaxies $(0.39^{+0.04}_{-0.04})$, while the lowest AGN fractions are found in unbarred FL systems $(0.09^{+0.03}_{-0.02})$. Our results suggest that stellar mass and color drive the primary trend in AGN activity in nearby disk galaxies, while stellar bars and spiral arms act as secondary structural drivers.
Comments15 pages, 7 figures, 7 tables, online data, Astronomy & Astrophysics, in press
DOI：10.1051/0004-6361/202661413
