M-Sigma项目
The M-Sigma Project
摘要：
超大质量黑洞（SMBH）的质量（M）与主球的恒星速度色散（σ）之间存在着密切的联系。这对我们理解星系和SMBH的形成和演化有着根本性的影响。然而，该关系的分散、斜率和零点是一些争论的主题。为了在这个关系上取得任何进展，M和sigma的既定值必须是稳健的。目前超过50%的M估计已经使用恒星动力学技术。然而，人们对这种方法表示严重关切，这促使对它们进行重新评价。此外，还不清楚如何最好地定义sigma。M-Sigma项目的目的是使用STIS长缝光谱学、积分场光谱学和最新的恒星模型，尽可能多地估计M和sigma的值。该项目将确定M-Sigma关系本身的最合适的属性。
英文摘要：
There is an intimate link between supermassive black hole (SMBH) mass (M) and the stellar velocity dispersion (sigma) of the host bulge. This has a fundamental impact on our understanding of galaxy and SMBH formation and evolution. However, the scatter, slope and zero-point of the relation is a subject of some debate. For any progress to be made on this relation, the established values of M and sigma must be robust. Over 50% of current M estimates have been made using the technique of stellar dynamics. However, there is serious concern over this method that prompts their re-evaluation. In addition, it is not clear how best to define sigma. The aim of the M-Sigma Project is to use STIS long-slit spectroscopy, integral field spectroscopy and the latest stellar models, to best estimate the values of M and sigma in as many cases as possible. The project will determine the most appropriate properties of the M-Sigma relation itself.
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