标题： 利用斯皮策红外光谱仪（IRS）光谱分析HAeBe星中的禁线氖发射线 显示英文标题

标题： Analysis of Forbidden Neon Emission lines in HAeBe Stars using Spitzer IRS spectra

摘要： 我们利用斯皮策红外光谱仪的数据分析了78颗已知赫比格Ae/Be（HAeBe）星的高分辨率中红外光谱，重点研究了[Ne{\sc II}]和[Ne{\sc III}]发射线以探测电离外流或盘风。在25个源中检测到[Ne{\sc II}]在12.81$\mu$μm处或[Ne{\sc III}]在15.55$\mu$μm处的发射，构成了目前包含这些发射线的最大样本的HAeBe星。 我们的分析显示，在相对吸积光度较低（L$_{acc}$/L$_*$ $<$ < 0.1）的源中发现了更高频率的[Ne{\sc II}]检测，这表明与盘消散阶段存在关联。 我们检查了氖线与各种光谱特征之间的相关性，并研究了[Ne{\sc III}]到[Ne{\sc II}]线流量比，以探索可能的发射机制。 氖发射主要出现在I组源（75%），它们的圆柱盘几何结构可能有助于观测到的发射，可能起源于被辐射的盘大气层。 有趣的是，我们还发现第二组源表现出更高的相对[Ne\textsc{ii}]线亮度（L$_\mathrm{[Ne\,II]}$/L$_*$）中位数，这表明可能与其更稳定的盘结构相关的光蒸发率增强。然而，需要更大的样本量和更高分辨率的光谱来最终确认这一趋势。在高检测率的[Fe{\sc II}]和[S{\sc III}]谱线（通常与EUV主导区域相关）以及在同时检测到这两条谱线的源中[Ne{\sc 三}]-到-[Ne{\sc II}]发射比大于0.1的情况下，这表明EUV辐射是我们样本中氖发射的主要驱动力。 显示英文摘要

摘要： We analyzed high-resolution mid-infrared spectra of 78 well-known Herbig Ae/Be (HAeBe) stars using Spitzer InfraRed Spectrograph data, focusing on the detection of [Ne {\sc II}] and [Ne {\sc III}] emission lines as indicators of ionized outflows or disk winds. Emission from [Ne {\sc II}] at 12.81 $\mu$m or [Ne {\sc III}] at 15.55 $\mu$m was identified in 25 sources, constituting the largest sample of HAeBe stars with these detected lines. Our analysis revealed a higher detection frequency of [Ne {\sc II}] in sources with lower relative accretion luminosity (L$_{acc}$/L$_*$ $<$ 0.1), suggesting a connection to the disk dispersal phase. We examined correlations between neon lines and various spectral features and investigated [Ne {\sc III}]-to-[Ne {\sc II}] line flux ratios to explore potential emission mechanisms. Neon emission is predominantly observed in Group I sources (75\%), where their flared disk geometry likely contributes to the observed emission, potentially originating from the irradiated disk atmosphere. Interestingly, we also find that Group II sources exhibit a higher median relative [Ne\,\textsc{ii}] line luminosity (L$_\mathrm{[Ne\,II]}$/L$_*$), suggesting enhanced photoevaporation rates possibly associated with their more settled disk structures. However, larger samples and higher-resolution spectra are required to confirm this trend definitively. The high detection rate of the [Fe {\sc II}] and [S {\sc III}] lines, commonly associated with EUV-dominated regions, alongside a [Ne {\sc III}]-to-[Ne {\sc II}] emission ratio greater than 0.1 in sources where both lines detected, suggests that EUV radiation is the primary driver of neon emission in our sample.