标题： SMA 和 NOEMA 揭示了 IRAS23077+6707 原行星盘中的不对称子结构 显示英文标题

标题： SMA and NOEMA reveal asymmetric sub-structure in the protoplanetary disk of IRAS23077+6707

摘要： 我们使用次毫米波阵列（SMA，1.33毫米/225.5吉赫）和北延伸毫米波阵列（NOEMA，2.7毫米/111.7吉赫和3.1毫米/96.2吉赫）提供了IRAS 23077+6707（“德古拉的奇维托”）的高分辨率数据。 IRAS 23077+6707是一个高度倾斜且新发现的原行星盘，首次在2024年报告。 我们结合了SMA的紧凑、扩展和非常扩展阵列的基线，以及NOEMA的A和C配置的基线，并展示了分辨率为${\lesssim}0.8''$的连续谱图像，这些图像是IRAS 23077+6707的首次亚角秒分辨率图。 这些图像显示了延伸的线性发射，跨度为$5.6{-}6.1''$，这符合径向扩展、高度倾斜的原行星盘的预期。 结合较低分辨率的数据，我们表明该盘具有陡峭的光谱指数，范围从$\alpha=3.2{-}3.9$。 我们提供了多个径向发射峰和谷的证据，这可能起源于盘环和中心空腔。 我们进一步提供了这些径向结构不对称的证据；拥有显著的亮度不对称性，北部的发射比南部增强了高达50%。 我们讨论了这些特征的潜在起源假说，包括IRAS 23077+6707可能拥有一个罕见的偏心原行星盘的例子，这可以引起这些径向不对称结构。 我们提出了IRAS 23077+6707的一个简单偏心连续谱模型，并展示了对于偏心率$e \approx 0.26$，这可以再现发射的整体形态。 显示英文摘要

摘要： We present high-resolution data of IRAS 23077+6707 (`Dracula's Chivito') with the Submillimeter Array (SMA at 1.33 mm/225.5 GHz) and the Northern Extended Millimeter Array (NOEMA at 2.7 mm/111.7 GHz and 3.1 mm/96.2 GHz). IRAS 23077+6707 is a highly-inclined and newly discovered protoplanetary disk, first reported in 2024. We combine SMA baselines from the Compact, Extended and Very Extended arrays, and NOEMA baselines from its A and C configurations, and present continuum images with resolution ${\lesssim}0.8''$, which constitute the first sub-arcsecond resolution maps of IRAS 23077+6707. The images show extended linear emission that spans $5.6{-}6.1''$ as expected for a radially extended, highly-inclined protoplanetary disk. Accompanied with lower resolution data, we show that the disk has a steep spectral index, ranging from $\alpha=3.2{-}3.9$. We present evidence of multiple radial emission peaks and troughs in emission, which may originate in disk rings and a central cavity. We further present evidence that these radial structures are asymmetric; hosting a a significant brightness asymmetry, with emission enhanced by up to 50% in the north versus the south. We discuss hypotheses about the potential origins of these features, including the possibility that IRAS 23077+6707 hosts a rare example of an eccentric protoplanetary disk, which can induce these radially asymmetric structures. We present a simple eccentric continuum model of IRAS 23077+6707, and show for an eccentricity of $e \approx 0.26$, that this can reproduce the bulk morphology of the emission.