论文标题
银河系的慢星形成：理论符合观察
Slow Star Formation in the Milky Way: Theory Meets Observations
论文作者
论文摘要
可以通过应用金属依赖性因子将CO发光度转换为分子气体质量和每个自由下落时间的恒星形成效率来解释，这是银河系的观察到的星形形成速率，该因子取决于分子云的病毒参数。这些程序还可以预测恒星形成速率表面密度的趋势，而中心半径则可以。病毒参数的每次自由下落时间变化的效率在使理论与观察到的总恒星形成速率一致方面起着主要作用，而CO亮度对质量转化的金属性依赖性在与半乳酸半径的变化中最为明显。这些变化的应用解决了已知近50年的观察到的恒星形成率和理论恒星形成率之间的差异超过100倍。
The observed star formation rate of the Milky Way can be explained by applying a metallicity-dependent factor to convert CO luminosity to molecular gas mass and a star formation efficiency per free-fall time that depends on the virial parameter of a molecular cloud. These procedures also predict the trend of star formation rate surface density with Galactocentric radius. The efficiency per free-fall time variation with virial parameter plays the major role in bringing theory into agreement with observations for the total star formation rate, while the metallicity dependence of the CO luminosity to mass conversion is most notable in the variation with Galactocentric radius. Application of these changes resolves a factor of over 100 discrepancy between observed and theoretical star formation rates that has been known for nearly 50 years.
