标题： 利用斯皮策/IRS发现的尘埃行星状星云的甚大望远镜/ X-shooter 光谱学 显示英文标题

标题： VLT/X-shooter Spectroscopy of a Dusty Planetary Nebula Discovered with Spitzer/IRS

摘要： 作为使用斯皮策太空望远镜对年轻恒星进行中红外光谱巡天的一部分，发现了一个未分类的红色发射线天体。根据斯皮策光谱所指示的高电离状态，该天体可能是尘埃弥漫的超新星遗迹（SNR）或者是行星状星云（PN）。在这篇研究简报中，我们对该天体进行了分类，并提供了可用的光谱数据供社区进一步分析。在甚大望远镜（VLT）/X-shooter科学验证运行期间获得了紫外/光学/近红外（UV/optical/NIR）光谱。大量发射线被识别出来，这使得确定该天体的性质成为可能。强烈的窄线（Δv ~ 8 - 74 km/s）以及非常低的线比，如[N II]/Hα和[S II]/Hα，表明该天体是一颗位于蛇夫分子云后方某一未知距离处的行星状星云（PN）。这展示了X-shooter作为有效工具用于约束具有未知光谱特性和颜色的微弱源性质的潜力。 显示英文摘要

摘要： As part of a mid-infrared spectroscopic survey of young stars with the Spitzer Space Telescope, an unclassified red emission line object was discovered. Based on its high ionization state indicated by the Spitzer spectrum, this object could either be a dusty Supernova Remnant (SNR) or a Planetary Nebula (PN). In this research note, the object is classified and the available spectroscopic data are presented to the community for further analysis. UV/optical/NIR spectra were obtained during the science verification run of the VLT/X-shooter. A large number of emission lines are identified allowing the determination of the nature of this object. The presence of strong, narrow (Delta_v ~ 8 - 74 km/s) emission lines, combined with very low line ratios of, e.g., [N II]/Halpha and [S II]/Halpha show that the object is a Planetary Nebula (PN) that lies at an undetermined distance behind the Serpens Molecular Cloud. This illustrates the potential of X-shooter as an efficient tool for constraining the nature of faint sources with unknown spectral properties or colors.