A stringent test of the galaxy formation paradigm: detailed modeling of the dynamics and stellar population of the Milky Way

对星系形成范式的严格测试：银河系动力学和恒星种群的详细建模

• 批准号: PP/D005574/1
• 负责人: Michele Cappellari
• 金额: $ 53.09万
• 依托单位: University of Oxford
• 依托单位国家: 英国
• 项目类别: Fellowship
• 财政年份: 2006
• 资助国家: 英国
• 起止时间: 2006 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=PP%2FD005574%2F1
• 关键词: stringent; test; galaxy; formation; paradigm

High and low-redshift observations, in combination with numerical simulations, have provided a scenario, over the last 30 years, in which galaxy formation proceeds in a hierarchical fashion, driven by the gravitational collapse of dark matter (DM). Although the scenario explains most of the observations, its strongest and cleanest predictions still have to be confirmed: (i) galaxies are expected to be embedded in massive DM halos, however, remarkably, the very existence of DM is still debated and the possibility that the laws of gravity are not those of Einstein is under discussion. (ii) the hierarchical build up of galaxies is expected to leave behind a very large number of substructures, in both the dark and luminous matter. Although some substructure in nearby galaxies exists, this is not at the expected level. (iii) galaxy formation models make detailed prediction about the age and chemical composition of galactic substructure, but these information are difficult to extract from galaxy observations. Due to its vicinity, our Milky Way constitute a unique laboratory to perform the above stringent observational tests of the galaxy formation paradigm. For our Galaxy in fact individual stars can be easily observed, and position and velocity can in principle be obtained. The stars could be used as tracers of the gravity to accurately detect the presence of DM. The chemical composition of individual stars can also be measured, and could be used, in combination with the stellar kinematics, to uncover stellar subcomponents in the Galaxy. However until now no such data existed. The situation is soon going to change dramatically. A number of ongoing large observational survey from the ground (RAVE, SEGUE) and from space (Gaia) will measure position and velocities for a large fraction of all the stars in our Galaxy. This will provide the biggest improvement in our knowledge of the Galaxy, since Galileo observed it with its telescope, four centuries ago, first realizing that it was actually made of individual stars. The new data have a similar potential to revolutionize our understanding of how galaxies form. The main goal of my proposed project is to perform the above three stringent tests of the galaxy formation paradigm, by constructing a detailed model of the dynamics and the chemical composition of our Milky Way, to be compared with the position, velocity and chemical composition stellar measurements provided by the RAVE, SEGUE and then Gaia survey.

在过去的30年中，高红移和低红移观察结果与数值模拟相结合，提供了一种场景，在这种情况下，由于暗物质的重力崩溃（DM），银河形成以等级方式进行。尽管该方案解释了大多数观察结果，但仍必须确认其最强和最清洁的预测：（i）预计星系有望嵌入大量的DM光晕中，但是，值得注意的是，DM的存在仍然存在争议，并且重力定律不是Einstein的讨论。 （ii）在黑暗和发光的物质中，星系的分层构建预计将留下大量的子结构。尽管附近星系中的某些子结构存在，但这不是预期的水平。 （iii）银河形成模型对银河系结构的年龄和化学组成进行了详细的预测，但是这些信息很难从星系观测中提取。由于其附近，我们的银河系构成了一个独特的实验室，用于对银河系范式进行上述严格的观察性测试。对于我们的银河系而言，实际上可以很容易地观察到个体恒星，并且可以原则上获得位置和速度。恒星可以用作重力的示踪剂，以准确检测DM的存在。也可以测量单个恒星的化学成分，并可以与恒星运动学结合使用，以发现银河系中的恒星亚组成部分。但是到目前为止，还没有此类数据。情况很快将发生巨大变化。从地面（狂欢，Segue）和太空（GAIA）进行的许多正在进行的大型观察性调查将测量我们银河系中所有恒星大部分的位置和速度。这将为我们对银河系的了解提供最大的进步，因为伽利略在四个世纪前就望远镜观察到了它，首先意识到它实际上是由个别恒星制成的。新数据具有类似的潜力，可以改变我们对星系形成方式的理解。我提出的项目的主要目标是通过构建银河形成范式的三个严格测试，通过构建我们银河系的动力学和化学成分的详细模型，并将其与Rave，Segue和segue和Gaia调查提供的位置，速度和化学成分恒星测量进行比较。

项目成果

DISCOVERY OF AN ACTIVE GALACTIC NUCLEUS DRIVEN MOLECULAR OUTFLOW IN THE LOCAL EARLY-TYPE GALAXY NGC 1266

• DOI: 10.1088/0004-637x/735/2/88
• 发表时间: 2011-04
• 期刊: The Astrophysical Journal
• 作者: K. Alatalo;L. Blitz;L. Young;T. Davis;M. Bureau;Laura A. Lopez;M. Cappellari;N. Scott;K. Shapiro;A. Crocker;Sergio Martín;M. Bois;F. Bournaud;R. Davies;P. Zeeuw;P. Duc;E. Emsellem;Jesus Falcon-Barosso;S. Khochfar;D. Krajnović;H. Kuntschner;P. Lablanche;R. McDermid;R. Morganti;T. Naab;T. Oosterloo;M. Sarzi;P. Serra;A. Weijmans

DYNAMICAL MASSES OF EARLY-TYPE GALAXIES AT z ~ 2: ARE THEY TRULY SUPERDENSE?

z ~ 2 处早期型星系的动态质量：它们真的是超稠密的吗？

• DOI: 10.1088/0004-637x/704/1/l34
• 发表时间: 2009
• 期刊: The Astrophysical Journal
• 作者: Cappellari M

The ATLAS3D project - V. The CO Tully-Fisher relation of early-type galaxies The CO-TFR of early-type galaxies

ATLAS3D 项目 - 五、早型星系的 CO Tully-Fisher 关系 早型星系的 CO-TFR

• DOI: 10.1111/j.1365-2966.2011.18284.x
• 发表时间: 2011
• 期刊: Monthly Notices of the Royal Astronomical Society
• 影响因子: 4.8
• 作者: Davis T

The mass of the black hole in Centaurus A from SINFONI AO-assisted integral-field observations of stellar kinematics

半人马座 A 黑洞的质量，来自 SINFONI AO 辅助的恒星运动学积分场观测

• DOI: 10.1111/j.1365-2966.2008.14377.x
• 发表时间: 2009
• 期刊: Monthly Notices of the Royal Astronomical Society
• 影响因子: 4.8
• 作者: Cappellari M

Measuring the inclination and mass-to-light ratio of axisymmetric galaxies via anisotropic Jeans models of stellar kinematics

• DOI: 10.1111/j.1365-2966.2008.13754.x
• 发表时间: 2008-05
• 期刊: Monthly Notices of the Royal Astronomical Society
• 影响因子: 4.8
• 作者: M. Cappellari