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.

我要求旅行资金支付在德克萨斯州/美国麦当劳天文台进行观察的费用。我在270万个望远镜病毒-P积分单元（IFU）光谱仪上获得了3晚，以在两个反射烟雾的背景下获得弥漫性星际吸收带（DIB）的空间分辨观测。这些光谱特征来自未知的复合体星际分子，并以某种方式连接到身份不明的红外发射（UIE）特征，但迄今未在如此高的空间分辨率和受控的视线范围内观察到。 IFU光谱将使我们能够研究不同的DIB Speicies的存在和分布，并将强度与内部灭绝等雾化特性进行比较。通过将观察到的吸收光谱与Spitzer红外望远镜产生的UIE图进行比较，我们希望能够更好地了解星际光化学，并因此鉴定这些分子。