发表机构
Taiwan Astronomical Research Alliance (TARA); Institute of Astronomy and Astrophysics, Academia Sinica（台湾天文研究联盟; 中央研究院天文及天文物理研究所）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究比较有棒与无棒窄线 Seyfert 1 星系，发现大规模恒星棒不增强瞬时光学 AGN 光度，可能调节内区气体输送并建立环核储库。
AI 中文摘要
我们对有棒与无棒窄线 Seyfert 1 星系（NLS1s）进行了统计比较，以研究大规模恒星棒在低质量黑洞活动星系核（AGN）供能中的作用。从 SDSS 和 Pan-STARRS1（PS1）选出的 492 个 NLS1s 母样本中，我们构建了由 101 个有棒和 101 个无棒 NLS1s 组成的 PS1 分辨匹配样本，在红移、倾角和图像质量上进行了匹配。在多个光学 AGN 光度指标中，包括 λLλ(5100 Å)、宽 Hα、宽 Hβ、窄 Hα、窄 Hβ 和 [O III] λ5007，无棒 NLS1s 比有棒 NLS1s 适度但一致地更亮，典型偏移约为 0.1–0.25 dex；宽 Hα 和窄线偏移具有统计显著性，而连续谱和宽 Hβ 偏移则较为边缘。蒙特卡洛重采样和贝叶斯模型支持相同的偏移方向。相比之下，主要的窄线诊断指标，包括 [O III]/Hβ、O3N2 和基于 [S II] 的电子密度，在子样本之间统计上一致，尽管有棒 NLS1s 显示出更高的 N2 比值。在有棒子样本中，棒强度参数 e_max 与光学连续谱和宽巴耳末线光度呈轻度反相关。这些结果表明，大规模恒星棒与增强的瞬时光学 AGN 光度无关。相反，有棒系统可能经历更受调控或随时间变化的内部气体输送，建立环核气体储库，而不一定增加在光学 AGN 发射所追踪的时期观测到的吸积功率。
英文摘要
We present a statistical comparison between barred and unbarred narrow-line Seyfert 1 galaxies (NLS1s) to investigate the role of large-scale stellar bars in fueling AGN with low-mass black holes. From a parent sample of 492 NLS1s selected from SDSS and Pan-STARRS1 (PS1), we construct a PS1-resolved matched sample of 101 barred and 101 unbarred NLS1s, matched in redshift, inclination, and image quality. Unbarred NLS1s are modestly but consistently brighter than barred NLS1s in several optical AGN luminosity indicators, including $λL_λ(5100~A)$, broad H$α$, broad H$β$, narrow H$α$, narrow H$β$, and [O III]~$λ5007$, with typical offsets of $\sim 0.1$--$0.25$ dex; the broad H$α$ and narrow-line offsets are statistically significant, while the continuum and broad H$β$ offsets are marginal. Monte Carlo resampling and a Bayesian model support the same direction of offset. In contrast, the main narrow-line diagnostics, including [O III]/H$β$, O3N2, and the [S II]-based electron density, are statistically consistent between the subsamples, although barred NLS1s show a higher N2 ratio. Within the barred subsample, the bar strength parameter $e_{\max}$ shows a mild anti-correlation with the optical continuum and broad Balmer-line luminosities. These results indicate that large-scale stellar bars are not associated with enhanced instantaneous optical AGN luminosity. Instead, barred systems may experience more regulated or time-variable inner gas delivery, building circumnuclear gas reservoirs without necessarily increasing accretion power observed at the epoch traced by optical AGN emission.
Comments19 pages, 8 figures. Accepted for publication in The Astrophysical Journal
