标题： 近红外自适应光学成像观测塞弗特星系NGC 3227中的核螺线结构 显示英文标题

标题： Near-IR adaptive optics imaging of nuclear spiral structure in the Seyfert galaxy, NGC3227

摘要： 我们利用CFHT的自适应光学装置获得了NGC3227核区的高空间分辨率近红外J、H、K波段图像。 约0.15弧秒（17秒差距）的分辨率能够探测核心区域的结构。 尘埃遮蔽在更长波长下变得明显减弱，揭示了核心区域的真实几何形状。 我们在观测图中识别出两个主要特征：(i) 一个螺旋状的结块关联，并在哈勃空间望远镜F606W图像中有对应特征；(ii) 一个与结块螺旋正交的小尺度环状结构。 这些特征可能提供了一种将物质向内传输以供能活跃星系核的机制。 显示英文摘要

摘要： We present high spatial resolution, near-IR images in J, H, K of the nucleus of NGC3227, obtained with the Adaptive Optics bonnette on CFHT. The ~0.15 arcsec (17pc) resolution allows structures to be probed in the core region. Dust obscuration becomes significantly less pronounced at longer wavelengths, revealing the true geometry of the core region. We are able to identify two main features in our maps: (i) a spiraling association of knots with a counterpart in an HST F606W image; (ii) a smaller scale annulus, orthogonal to the spiral of knots. These features may provide a means to transport material inwards to fuel the active nucleus.