High Spectral Resolution Observations of the Interstellar Medium in the Nuclei of Nearby Galaxies using Herschel and SOFIA

使用赫歇尔和索菲亚对附近星系核中的星际介质进行高光谱分辨率观测

• 批准号: 70121006
• 负责人: Professor Dr. Jürgen Stutzki, since 8/2008
• 金额: --
• 依托单位: Institut für Astrophysik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2008
• 资助国家: 德国
• 起止时间: 2007-12-31 至 2012-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/70121006?language=en
• 关键词: Spectral; Resolution; Observations; Interstellar; Medium

The heterodyne instruments on Herschel and SOFIA will provide for the first time an extensive inventory of the major cooling lines of the ISM in galactic nuclei sampling a wide range of physical conditions hardly found in the Milky Way. Previous observations with the KAO and ISO have left many questions unanswered which the FIR observatories with their high angular and high spectral resolutions can now address. We plan to focus on the following three key questions: 1) What are the physical conditions of the emitting star-forming gas in galactic nuclei, and what does the cooling emission tell us about the major pathways heating the gas? This will also tell us the importance of star formation over AGNs, of FUV photons over shocks, or of FUV photons over X-rays. 2) A second key questions is the origin of [CII] emission, the most important cooling line of the ISM. The relative importance of the different phases of the ISM is yet unclear will vary with physical environment. 3) Including the Magellanic Clouds in the sample will allow to study at small spatial scales how variations in the metallicity influence the other physical and chemical properties of the ISM.

Herschel和索菲亚上的外差仪器将首次提供星系核中ISM主要冷却线的广泛清单，对银河系中几乎找不到的各种物理条件进行采样。KAO和ISO以前的观测留下了许多未回答的问题，FIR天文台具有高角度和高光谱分辨率，现在可以解决这些问题。我们计划集中在以下三个关键问题：1）星系核中发射恒星形成气体的物理条件是什么，冷却发射告诉我们关于加热气体的主要途径是什么？这也将告诉我们星星形成对活动星系核的重要性，FUV光子对激波的重要性，或FUV光子对X射线的重要性。2)第二个关键问题是[CII]排放的起源，这是ISM最重要的冷却线。ISM不同阶段的相对重要性还不清楚，将随着物理环境的变化而变化。3)在样本中包括麦哲伦云将允许在小空间尺度上研究金属丰度的变化如何影响ISM的其他物理和化学性质。

项目成果

GREAT confirms transient nature of the circum-nuclear disk

GREAT 证实了环核盘的瞬态性质

• DOI: 10.1051/0004-6361/201219068
• 发表时间: 2012
• 期刊: Astronomy and Astrophysics
• 影响因子: 6.5
• 作者: Requena-Torres;Güsten;Harris;Martìn- Pintado;Stutzki;Heyminck;Risacher
• 通讯作者: Risacher

GREAT/SOFIA atmospheric calibration

GREAT/SOFIA 大气校准

• DOI: 10.1051/0004-6361/201218925
• 发表时间: 2012
• 期刊: Astronomy and Astrophysics
• 影响因子: 6.5
• 作者: Stutzki;Güsten;Requena- Torres;Wiesemeyer
• 通讯作者: Wiesemeyer