论文标题
可观察的恒星参数与LMC中AGB恒星的质量损失率的关系
Relation of Observable Stellar Parameters to Mass-Loss Rate of AGB Stars in the LMC
论文作者
论文摘要
使用Riebel等。 (2012) data set for 6,889 pulsating AGB stars in the LMC, we have derived formulae for mass-loss rate as a function of luminosity and pulsation period or luminosity and mass in three ways, for each of five subsets of data: fundamental mode oxygen rich stars, first overtone mode oxygen rich stars stars, fundamental mode carbon stars, first overtone mode carbon stars, and extreme carbon stars.使用恒星在周期与亮度和质量与光度方面的分布，我们能够得出符合质量损失速率对这些数量的依赖的幂律。这导致公式可再现观察到的质量损失率，并且与质量损失模型的预期一般一致，即质量损失率对亮度，质量和脉动时期高度敏感。 在进行此分析的过程中，我们发现了半径质量的露光性，并使用已发表的进化和脉动模型检查了脉动 - 玛迪乌斯关系。这些使我们能够从观察到的数量光度和脉动周期中得出质量和半径。我们还得出了新的质量损失率与颜色关系。
Using the Riebel et al. (2012) data set for 6,889 pulsating AGB stars in the LMC, we have derived formulae for mass-loss rate as a function of luminosity and pulsation period or luminosity and mass in three ways, for each of five subsets of data: fundamental mode oxygen rich stars, first overtone mode oxygen rich stars stars, fundamental mode carbon stars, first overtone mode carbon stars, and extreme carbon stars. Using the distribution of the stars in period versus luminosity and mass versus luminosity, we are able to derive a power-law fit to the dependence of mass-loss rate on those quantities. This results in formulae that reproduce observed mass-loss rates and are in general agreement with the expectation from mass-loss models that the mass-loss rate is highly sensitive to luminosity, mass, and pulsation period. In the process of carrying out this analysis we have found radius-mass-luminosity and examined pulsation-mass-radius relations using published evolutionary and pulsation models. These allow us to derive mass and radius from the observed quantities luminosity and pulsation period. We also derived new mass-loss rate versus color relations.
