Using reflection nebulae to study the diffuse interstellar bands

利用反射星云研究弥漫的星际带

• 批准号: 328407358
• 负责人: Dr. Frederic Hessman, Ph.D.
• 金额: --
• 依托单位: Institut für Astrophysik und Geophysik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2016
• 资助国家: 德国
• 起止时间: 2015-12-31 至 2016-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/328407358?language=en
• 关键词: Using; reflection; nebulae; study; diffuse

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.

我正在申请旅行资金，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 3 个晚上的 2.7m 望远镜 VIRUS-P 积分场单元 (IFU) 摄谱仪的奖励，以获得在两个反射星云背景下的弥漫星际吸收带 (DIB) 的空间分辨观测。这些光谱特征大多来自未知的复杂星际分子，并以某种方式与未识别的红外发射（UIE）特征相关，但迄今为止尚未在如此高的空间分辨率和受控视线下观察到。 IFU 光谱将使我们能够研究不同 DIB 物种的存在和分布，并将其强度与内部消光等星云特性进行比较。通过将观测到的吸收光谱与斯皮策红外望远镜生成的 UIE 图进行比较，我们希望获得有关星际光化学的更多知识，从而更好地识别这些分子。