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arXiv 0709.3682astro-ph
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Galerkin的Vcirc-sigma0关系

The Vcirc-sigma0 Relation of Galaxies

Stephane Courteau, Michael McDonald, Lawrence M. Widrow

摘要:

Courteau等人(2007 a)报道了星系的最大圆周速度Vcirc与其中心速度色散σ 0的比值对形态的依赖性,或者等价地对总光浓度的依赖性。这种Vcirc-sigma 0浓度关系涉及到局部和全局星系物理的细节,对星系结构模型提出了根本性的挑战。此外,这些模型不仅要重现Vcirc-sigma 0关系及其各种依赖性,它们必须同时匹配其他基本的标度关系,如星系的速度-大小-光度和颜色-光度关系。在这里,我们专注于解释的参数,进入Vcirc-sigma 0关系,使适当的数据模型比较和后续研究的星系建模者和观察者。

英文摘要:

Courteau et al. (2007a) reported on the dependence of the ratio of a galaxy's maximum circular velocity, Vcirc, to its central velocity dispersion, sigma0, on morphology, or equivalently total light concentration. This Vcirc-sigma0 concentration relation, which involves details about the local and global galaxy physics, poses a fundamental challenge for galaxy structure models. Furthermore, not only must these models reproduce the Vcirc-sigma0 relation and its various dependences, they must simultaneously match other fundamental scaling relations such as the velocity-size-luminosity and color-luminosity relations of galaxies. We focus here on the interpretation of parameters that enter the Vcirc-sigma0 relation to enable proper data-model comparisons and follow-up studies by galaxy modelers and observers.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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