发表机构
Indian Institute of Astrophysics; Pondicherry University（印度天体物理研究所; 本地治里大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究基于MaNGA数据，发现棒状星系具有更高的恒星形成率，且黑洞质量较低，揭示了恒星棒在星系演化中的关键作用。
AI 中文摘要
本研究利用SDSS-IV MaNGA巡天中的7,408个星系（其中2,641个为棒状星系），探讨了恒星棒和活动星系核（AGN）等内部结构在塑造星系演化中的作用。我们的分析覆盖了从矮星系到大质量星系的广泛恒星质量范围，研究了内部和环境过程如何调节星系演化。星系按形态（椭圆星系（E）、透镜星系（S0s）、早型旋涡星系（ETS）和晚型旋涡星系（LTS））、环境以及是否存在棒进行分类。我们发现，在大多数恒星质量区间内，棒状星系的中位比恒星形成率（sSFR）高于非棒状星系。这种差异随宿主星系形态而变化，LTS和S0星系在不同恒星质量区间表现出不同的趋势。在同一质量区间内，棒状和非棒状星系的环境趋势大致相似。在AGN宿主中，棒状Seyfert星系倾向于位于恒星形成-绿谷边界附近，而棒状LINER星系则优先占据绿谷。我们进一步研究了恒星棒与黑洞质量之间的关系，发现棒状星系中的黑洞质量系统性地低于非棒状星系，而环境效应似乎在塑造这些差异中起次要作用。多变量回归分析还表明，在考虑了恒星质量、局部密度、AGN活动和形态之后，棒-sSFR的正相关关系对恒星形成星系仍然具有统计显著性。我们的结果突显了恒星棒、恒星质量、形态和环境在塑造星系恒星形成中的相互关联作用，为恒星棒在星系演化中的作用提供了新的见解。
英文摘要
This study investigates the role of internal structures, such as stellar bars and active galactic nuclei (AGN), in shaping galaxy evolution using 7,408 galaxies (2,641 barred) from the SDSS-IV MaNGA survey. Our analysis spans a wide stellar mass range, from dwarf to massive galaxies, examining how internal and environmental processes regulate galaxy evolution. Galaxies are categorized by morphology (ellipticals (E), lenticulars (S0s), early-type spirals (ETS), and late-type spirals (LTS)), environment, and the presence of a bar. We find that barred galaxies have higher median specific star formation rate (sSFR) than unbarred galaxies across most stellar mass intervals. This difference varies with host morphology, with LTS and S0 galaxies showing different trends across stellar mass intervals. The environmental trends of barred and unbarred galaxies are broadly similar within the same mass intervals. In AGN hosts, barred Seyferts tend to lie near the star-forming$-$green valley boundary, while barred LINERs preferentially occupy the green valley. We further examine the relation between stellar bars and black hole mass and find that barred galaxies host systematically lower black hole masses than unbarred galaxies, with environmental effects appearing to play a secondary role in shaping these differences. A multivariate regression analysis also shows that the positive bar$-$sSFR association remains statistically significant for star-forming galaxies after accounting for stellar mass, local density, AGN activity, and morphology. Our results highlight the interconnected roles of stellar bars, stellar mass, morphology, and environment in shaping galaxy star formation, providing new insights into the role of stellar bars in galaxy evolution.
Comments14 pages, 7 figures, 2 tables. Accepted for publication in ApJ
