Wind Models and Ionizing Fluxes of Massive Stars at Very Low Metallicity
Wind Models and Ionizing Fluxes of Massive Stars at Very Low Metallicity
复制标题
极低金属丰度下大质量恒星的风模型和电离通量
DOI：
10.1007/10719504_21
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发表时间：
2000
期刊：
影响因子：
--
通讯作者：
R. Kudritzki
中科院分区：
文献类型：
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作者：
R. Kudritzki
风模型的金属丰度在0.0001至1.0太阳的范围内的大质量恒星的计算使用一个新的治疗辐射驱动的风与深度相关的辐射力乘数和一个全面的列表中超过两百万的光谱线NLTE。计算产生的质量损失率，风动量和风能作为金属丰度的函数，并可用于讨论恒星风对恒星种群的演化在星系形成的早期阶段的影响。热恒星的电离通量取决于其恒星风的强度至关重要，修改的吸收边的氢和氦（中性和电离）在远紫外线。因此，新的风模型也被用来预测作为金属丰度函数的大质量恒星的电离通量。
Wind Models of massive stars with metallicities in a range from 0.0001 to 1.0 solar are calculated using a new treatment of radiation driven winds with depth dependent radiative force multipliers and a comprehensive list of more than two millions of spectral lines in NLTE. The calculations yield mass-loss rates, wind momenta and wind energies as a function of metallicity and can be used to discuss the impact of stellar winds on the evolution of stellar populations in the early phases of galaxy formation.Ionizing fluxes of hot stars depend crucially on the strengths of their stellar winds, which modify the absorption edges of hydrogen and helium (neutral and ionized) in the far UV. The new wind models are therefore also used to predict ionizing fluxes of massive stars as a function of metallicity.