Using reflection nebulae to study the diffuse interstellar bands

我请求旅费以支付在美国德克萨斯州麦克唐纳天文台进行观测的费用。我获得了在2.7m望远镜VIRUS-P积分场单元（IFU）光谱仪上的3个晚上，在两个反射星云的背景下获得了漫射星际吸收带（DIB）的空间分辨观测。这些光谱特征来自大部分未知的复杂星际分子，并且在某种程度上与未知的红外发射（UIE）特征有关，但迄今为止还没有在如此高的空间分辨率和可控的视线下观察到。IFU光谱将使我们能够研究不同DIB物种的存在和分布，并将其强度与星云特性（如内部消光）进行比较。通过将观测到的吸收光谱与斯皮策红外望远镜产生的UIE图进行比较，我们希望能更好地了解星际光化学，从而识别这些分子。

I am requesting travel funds to cover the expenses of an observing run at McDonald Observatory in Texas/USA. I have been awarded 3 nights on th 2.7m telescopes VIRUS-P integral field unit (IFU) spectrograph to obtain spatially-resolved observations of diffuse interstellar absorption bands (DIB) against the background of two reflection nebulae. These spectral features are from largely unknown complex interstellar molecules and are somehow connected to the unidentified infrared emission (UIE) features but have hitherto not been observed at such high spatial resolution and controlled line-of-sights. The IFU spectra will permit us to study the presence and distribution of different DIB speicies and to compare the strengths with nebular properties like internal extinction. By also comparing the observed absorption spectrum with UIE maps produced by the Spitzer infrared telescope, we hope to gain better knowledge about the interstellar photochemistry and hence identification of these molecules.