Predicting star formation and metal enrichment in quasars for high-redshift ALMA observations

预测类星体中恒星形成和金属富集以进行高红移 ALMA 观测

• 批准号: 126893565
• 负责人: Professor Dr. Ralf Klessen, Ph.D.
• 金额: --
• 依托单位: Hamburger Sternwarte
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2009
• 资助国家: 德国
• 起止时间: 2008-12-31 至 2013-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/126893565?language=en
• 关键词: Predicting; star; formation; metal; enrichment

The Atacama Large Millimeter/submillimeter Array (ALMA) will lead to a quantum leap in observations, as sensitivity, angular and spectral resolution will all increase by two orders of magnitude compared to previous telescopes. Recent studies by Marco Spaans indicate that observations of miniquasar host galaxies with black hole masses larger than 106Mʘ are feasible at redshift z ~ 10 via redshifted lines of CO and H2 as well as continuum dust emission. In this proposal, we want to make further predictions that are relevant for future observations of ALMA. In particular, we want to address star formation and metal-enrichment in high-redshift quasars and translate it into observables for CO and dust emission. For this purpose, we suggest an approach based on detailed three dimensional numerical simulations taking into account feedback from X-rays, jets and outflows, which was suggested to trigger star formation. As a by-product, we will create a module for the simulation code to handle X-ray chemistry in metal-enriched systems that will be available for the public. We further will employ semi-analytic models that address the cosmic evolution of the miniquasar population, based on current observations of quasar metallicities and constraints from the observed X-ray background.

阿塔卡马大型毫米/亚毫米阵列（阿尔马）将导致观测的飞跃，因为灵敏度，角度和光谱分辨率都将比以前的望远镜增加两个数量级。Marco Spaans最近的研究表明，通过CO和H2的红移线以及连续尘埃辐射，在红移z ~ 10处观测黑洞质量大于106 M Ω的小型类星体宿主星系是可行的。在这个建议中，我们希望进一步预测与未来观测阿尔马有关的情况。特别是，我们要解决星星的形成和金属富集在高红移类星体，并将其转化为观测CO和尘埃排放。为此，我们提出了一种基于详细的三维数值模拟的方法，同时考虑到从X射线，射流和外流，这是建议触发星星形成的反馈。作为副产品，我们将为模拟代码创建一个模块，以处理金属富集系统中的X射线化学，该系统将向公众开放。我们还将采用半解析模型，解决宇宙演化的迷你类星体人口，根据目前的观测类星体金属丰度和约束条件，从观测到的X射线背景。

项目成果

THE GENERATION OF STRONG MAGNETIC FIELDS DURING THE FORMATION OF THE FIRST STARS

第一批恒星形成过程中强磁场的产生

• DOI: 10.1088/2041-8205/721/2/l134
• 发表时间: 2010
• 期刊: The Astrophysical Journal Letters
• 作者: Sharanya Sur;Dominik R. G. Schleicher;Robi Banerjee;Christoph Federrath;Ralf S. Klessen
• 通讯作者: Ralf S. Klessen

Probing high-redshift quasars with ALMA. I. Expected observables and potential number of sources

使用 ALMA I 探测高红移类星体 预期可观测值和潜在源数量

• DOI: 10.1051/0004-6361/200913467
• 发表时间: 2010
• 期刊: Astronomy and Astrophysics
• 影响因子: 6.5
• 作者: Dominik R.G. Schleicher;Marco Spaans;Ralf S. Klessen
• 通讯作者: Ralf S. Klessen

A NEW JEANS RESOLUTION CRITERION FOR (M)HD SIMULATIONS OF SELF-GRAVITATING GAS: APPLICATION TO MAGNETIC FIELD AMPLIFICATION BY GRAVITY-DRIVEN TURBULENCE

自重力气体 (M)HD 模拟的新 Jean 分辨率准则：在重力驱动湍流磁场放大中的应用

• DOI: 10.1088/0004-637x/731/1/62
• 发表时间: 2011
• 期刊: The Astrophysical Journal
• 作者: Christoph Federrath;Sharanya Sur;Dominik R. G Schleicher;Robi Banerjee;Ralf S. Klessen
• 通讯作者: Ralf S. Klessen