标题： 银河系与Tully-Fisher关系 显示英文标题

标题： The Milky Way and the Tully-Fisher relation

摘要： 我们基于针对“太阳圆柱体”的模型给出了银河盘在B、V、I波段的面密度和面亮度的更新估计值，该模型经过校准以再现Hipparcos和Tycho的恒星计数。 我们讨论了局部恒星盘的质量-光度比，并推断了银河系的整体光度，结果显示它相对于Tully-Fisher关系而言是欠亮的。 显示英文摘要

摘要： We present an updated estimate of the surface density and surface brightness in B,V,I of the local Galactic disc, based on a model for the "Solar cylinder" calibrated to reproduce Hipparcos and Tycho star counts. We discuss the mass-to-light ratio of the local stellar disc and infer the global luminosity of the Milky Way, which results underluminous with respect to the Tully-Fisher relation.